メインコンテンツにスキップ
Free ConsultationCounseling

The Complete Guide to Seisen International School: Tuition, IB Results, Comparison with Sacred Heart, and Admission Strategies [2026 Edition]

Updated:
Published:
2026 Latest
清泉インターナショナルスクール(Seisen)完全ガイド:学費・IB実績・聖心との違い・入試対策を徹底解説【2026年版】 - ELTスクール 英語学習コラム
Tatsuya Tanaka

Author: Tatsuya Tanaka|Representative Director, ELT Japan

"If I'm sending my daughter to an international school, I want a calm environment where she can truly develop her academic potential."

For parents who feel this way, all-girls international schools in Tokyo are a very attractive option. Among them, Seisen International School, located in the quiet residential area of Setagaya, is known for successfully combining a warm, at-home atmosphere with world-class university placements.

"If you're considering a girls' international school in central Tokyo, should you choose Seisen or the International School of the Sacred Heart?"

"Is admission possible for families holding only Japanese citizenship?"

"How strong is its all-through IB programme?"

In this article, ELT, with a proven track record of helping numerous students gain admission to Seisen, provides a comprehensive overview of the school and a detailed guide to its admission strategies, based on official data and our unique coaching expertise.

In this article, we'll take a deep dive into the features and reputation of Seisen International School, comparing it with its rival, ISSH. We've also included the latest 2025 IB scores and admissions information to help you with your school selection process.

1. In-Depth Comparison: Seisen vs. ISSH — What Are the Key Differences?

First, let's break down the crucial differences between these two schools that many parents consider. The biggest distinction lies in their curriculum (IB vs. AP).

Comparison Point

Seisen

ISSH

Location

Yoga, Setagaya
(Quiet residential area)

Hiroo, Shibuya
(Central area with many embassies)

Curriculum

Full IB School (PYP/MYP/DP)
European-style, inquiry-based learning

American-style + AP Program
North American-style, liberal arts focus

Educational Features

Japan's first all-girls IB Continuum school.
Fosters critical thinking through consistent "inquiry-based learning" from kindergarten to high school.

Based on a traditional American curriculum, with 22 AP (college-level) courses available in high school.

University Placement Trends

Globally diverse.
Strong placements in Europe, Canada, and top Japanese universities (Waseda, Keio, Sophia, ICU) using the IB Diploma.

Strong North American focus.
About half of graduates attend US universities, with many placements in Ivy League and other top schools.

School Culture & Atmosphere

Warm and at-home.
A smaller school (approx. 700 students) with close student-teacher relationships and a family-like atmosphere.

Traditional and cosmopolitan.
Reflecting its Hiroo location, it has a multinational and sophisticated community, including many from embassy families.

【Key Takeaways for Choosing】

  • Who is Seisen a good fit for? Students who are naturally inquisitive and enjoy deep-diving into a single topic. Families considering universities in Europe, Canada, or Japan.
  • Who is ISSH a good fit for? Students who want the flexibility to study a wide range of subjects. Families primarily targeting universities in the United States.

Read article

A Deep Dive into the World's Top 3 Curricula | IB, A-Level, AP: Which One is Right for You?

2. Latest Academic Results and IB Scores

When you hear "at-home atmosphere," you might wonder if the academics are less rigorous. However, Seisen's academic performance is among the best of all international schools in Japan.

Exceptional IB Diploma Pass Rate

The results of the graduating class of 2025 demonstrate the high level of education.

  • Average Score: 35 points (World average: 30.5 points)
  • Pass Rate: 97.7% (World average: approx. 80%)

The IB Diploma is notoriously difficult to obtain, yet at Seisen, nearly all students earn the full diploma and achieve scores well above the global average. The school consistently produces high-scorers with 40+ points (out of 45) each year, indicating an extremely high quality of instruction.

Placements at Top Universities Worldwide

Leveraging these high IB scores, graduates go on to attend prestigious universities across the globe.

  • International: Harvard, Princeton, Columbia, Stanford, MIT, Oxford, Cambridge, and more.
  • Domestic (Japan): Waseda, Keio, Sophia (with Catholic school recommendations), ICU, and more.

Particularly noteworthy is the school's strength in STEM fields. Despite being an all-girls school, many graduates go on to study medicine and engineering, developing their talents in science and math in an environment free from gender bias.

3. The Reality and Reputation of a Catholic Girls' School

We'll address common questions from parents, such as "Is the religious influence strong?" and "Aren't social dynamics difficult at an all-girls school?"

Is it okay for non-Christians?

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

The Unique Leadership Opportunities of an All-Girls School

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

4. Admissions and English Language Support

What kind of preparation is necessary for those wishing to enroll at Seisen?

Admissions for Kindergarten (Montessori) to Early Elementary

Admissions for this age group focus more on observational assessments and interviews rather than written tests.

  • Playdate Format: During a play-based session with teachers, children are observed on their ability to follow instructions, share toys, and engage with activities curiously.
  • English Proficiency: For Kindergarten (K1-K3), native-level English is not required. If a child can say "Hello" and respond to simple instructions from a teacher, they have a good chance of being accepted.

Admissions for Upper Elementary to High School

As students get older, the required level of English proficiency increases significantly.

  • MAP Test: Applicants will take the MAP (Measures of Academic Progress) test, an aptitude test in English and Math used by many international schools.
  • Essay & Interview: The ability to write logically and articulate one's motivations during an interview is assessed.
  • EAL (English as an Additional Language): While English support classes are available, spots are very limited. For transfers into upper grades, sufficient English proficiency to keep up with mainstream classes is generally a prerequisite.

Read article

MAP Test (MAP Growth) Score Benchmarks and Prep Strategies: How to Interpret RIT & Percentile Scores and Overcome Plateaus

Conclusion: A School Where Warmth and Intellect Coexist

Seisen International School is a place where the "warm, character-focused education" typical of a Catholic school masterfully blends with the "rigorous inquiry-based learning" of an IB World School. While it might sometimes be perceived as a flashy "finishing school for girls," it is, in reality, more like a "dojo"—a training ground where students from diverse backgrounds challenge each other and grow into independent young women.

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Aiming for Admission to Seisen International School? Consider "ELT"

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Apply for a Free Counseling Session at ELT

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

多様な進路に対応

The results of the graduating class of 2025 demonstrate the high level of education.

このような柔軟な経路設計は、「IB Diplomaを取得できる生徒だけが残る」のではなく、多様な強みを持つ女子生徒それぞれに合った進路を保証するという清泉の教育哲学を反映しています。

2. 清泉のカリキュラム — モンテッソーリからIB、IGCSEまでの一貫設計

清泉のカリキュラムの最大の特徴は、幼稚部のモンテッソーリから高校のIB Diplomaまで、探究型学習が一貫して設計されている点です。

Kindergarten(K3-K5): モンテッソーリ+PYP

幼稚部はモンテッソーリ教育を基盤としつつ、IB PYPの要素を導入した独自のプログラムです。子どもの自発性を尊重し、教具を使った具体的な探究活動を通じて、好奇心と自立性を育みます。

清泉のKindergartenは幼稚部のみ共学で、男女が一緒に学べる稀有な環境です。Grade 1進級時に、女子のみが残ります(男子は他校へ進学)。

Grade 1-5: PYP(Primary Years Programme)

PYPは、6つの「探究のテーマ」(自分自身、空間と時間、自己表現、世界の仕組み、組織の仕組み、地球を共有する)に基づく探究型学習です。決まった教科書を順番に進めるのではなく、子ども自身が問いを立て、調べ、まとめ、発表するサイクルを繰り返します。

Grade 5の最終課題はExhibition(公開発表会)。1つのテーマを数ヶ月かけて深く探究し、保護者・教員・後輩の前でプレゼンテーションを行います。これは「PYPの集大成」と位置づけられ、子どもの探究力と発表力の両方を可視化する機会です。

Grade 6-10: MYP(Middle Years Programme、2020年認定)

MYPは概念駆動型学習を特徴とする中学高校前半のプログラムです。8つの教科グループ(言語と文学、言語習得、個人と社会、理科、数学、芸術、保健体育、デザイン)すべてを履修し、教科横断的な学びを通じて批判的思考を育てます。

清泉のMYP認定は2020年。これによりPYP→MYP→DPがすべて自校で完結する稀有な体制が完成しました。

Grade 11-12: DP(Diploma Programme)

IB Diploma Programmeは、世界中の大学が高く評価する高校2年間のプログラムです。清泉では特にTheory of Knowledge(TOK)の指導Extended Essay(EE)のサポートに強みがあります。

Read article

Is the IB (International Baccalaureate) Too Difficult? Understanding the PYP/MYP/DP System and How to Avoid Dropping Out

IGCSE選択 — 他のIB校にはない清泉独自のオプション

清泉は、Grade 11-12でIGCSEを選択できるという、日本のIB校としては珍しい運用をしています。これにより、IB Diplomaを取得しない生徒も、英国の標準資格であるIGCSEを取得して卒業できます。

IGCSE選択の意義は、生徒の柔軟な進路設計にあります。「IB Diplomaの全要素(TOK、EE、CAS、6科目)を履修するのは負担が大きいが、英国系の標準資格は取得したい」という生徒のニーズに応える設計です。

Read article

The Complete Guide to IGCSE/GCSE and Strategy for A-Level & IBDP | Avoiding the 'Subject Selection Trap' and Finding the Shortest Path to Top Universities

3. 2025年最新の学業実績と過去3年トラックレコード

清泉のIB実績は、過去3年間連続で世界平均を大きく上回るという構造的な強さを持っています。

過去3年のIB DP実績

年度

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

平均スコア

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

合格率

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

受験者数

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

40点以上取得者

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

世界平均

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

世界平均との差

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

2025年

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

35点

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

97.7%

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

43名

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

8名

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

30.58点

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

+4.4点

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

2024年

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

34点

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

97.8%

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

非公開

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

4名

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

30.32点

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

+3.7点

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

2023年

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

34点

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

97.6%

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

非公開

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

5名

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

30.24点

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

+3.8点

The results of the graduating class of 2025 demonstrate the high level of education.

出典: 清泉公式School Profile、IBO公式統計

この数字が意味すること

過去3年間、合格率は常に97.6%以上、平均スコアは34-35点で安定推移。これは「年によってばらつく」のではなく、「学校として確立された指導力がある」ことの証拠です。

世界平均との上振れ幅にも注目してください。2025年は世界平均より+4.4点高いという水準は、世界的なエリート校に匹敵します。日本のIB校全体の平均(推定33-34点)と比較しても、清泉の35点は明確に上位です。

40点以上取得者数の意味

IB Diplomaは45点満点で、世界全体で40点以上を取得するのは全受験者の上位5%程度に限定されます。清泉では2025年に8名が40点以上を取得しており、これは受験者43名中の約19%にあたります。

40点以上を取得した生徒は、Oxford、Cambridge、Imperial College London、UCL、Princeton、Stanford等の世界トップ大学への合格圏内に入ります。清泉の40点以上8名という数字は、Class of 2025の進学実績の質を裏付ける重要な指標です。

IGCSE選択者の実績

公式統計には記載されていませんが、IGCSE選択者も例年安定した成績を残しており、英国系大学への進学に有利な評価を得ています。

4. 進学実績 — 世界99大学への分散進学

清泉の卒業生は、2020-2024年の5年間で延べ99大学に進学しています(公式公表)。これは「IB校としての多地域進学の典型」を示すデータです。

Class of 2024 destinations(地域別比率)

進学先地域

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

比率

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

Japan & Asia

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

39%

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

US & Canada

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

35%

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

UK & Europe

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

14%

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

その他

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

12%

The results of the graduating class of 2025 demonstrate the high level of education.

2025年プロフィールでさらに詳細な内訳

進学先国・地域

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

比率

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

Japan

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

35%

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

USA

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

21%

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Canada

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

14%

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

UK

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

8%

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Netherlands

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

4%

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Hungary

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

4%

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Australia / New Zealand

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

4%

The results of the graduating class of 2025 demonstrate the high level of education.

Matriculating Students 2022-2025の具体的大学名

地域

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

大学名

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

日本

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

東京大学京都大学早稲田大学、慶應義塾大学、上智大学、ICU(国際基督教大学)、立教大学

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

米国

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Amherst College、NYU、Northwestern、Notre Dame、UC Berkeley、UCLA、UC San Diego、University of Michigan

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

カナダ

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

UBC、McGill University、University of Toronto、University of Waterloo

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

英国

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

King's College London、UCL、University of Edinburgh、University of Bristol、University of Warwick、University of Manchester

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

アジア

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Chinese University of Hong Kong、HKU、KAIST、Yonsei University

The results of the graduating class of 2025 demonstrate the high level of education.

出典: 清泉公式 Matriculating Students 2022-2025

注目すべき4つのポイント

1. 東大・京大・早慶への進学

「IB校から日本のトップ大学は難しい」という一般論に反し、清泉は東京大学・京都大学・早稲田・慶應への進学実績を着実に積み上げています。これはIB Diplomaを活用した総合型選抜・国際生入試と、上智カトリック推薦枠の活用が功を奏しています。

2. 米国アイビーリーグおよびリベラルアーツの厚み

NYU、Northwestern、UC Berkeley、UCLAは米国の総合大学トップ校。Amherst Collegeはリベラルアーツのトップ校で、女子校として米国リベラルアーツ進学に強い清泉の特徴を表しています。

3. STEM分野への強さ

KAIST、Waterloo、UIUC(過去実績あり)、Michigan等の理工系名門校への進学が目立ちます。これは後述するFirebird Science & Innovation Teamの活動が、生徒のSTEM志向を支えていることを示しています。

4. 英国・カナダ・欧州への分散

UCL、Edinburgh、McGill、Toronto、UBCは英連邦圏の名門総合大学。IB Diplomaの国際的通用性を最大限活用した進路設計です。

5. 【最重要】清泉 vs 聖心(ISSH)— 6つの本質的な違い

カトリック系女子インターを検討する保護者にとって、最大の論点は「清泉と聖心のどちらを選ぶべきか」です。両校とも東京を代表する女子インターですが、カリキュラムから入試の制度まで、6つの本質的な違いがあります。

比較表

違い

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

清泉(Seisen)

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

聖心(ISSH)

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

1. カリキュラム

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

IB一貫(PYP/MYP/DP)+ IGCSE選択可

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

米国式 + AP(24科目)

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

2. 学業実績の見え方

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

IB35点(過去3年トラックレコード)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

AP4.27/5、3+が93%

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

3. 進学傾向

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

多地域分散(日アジア39%、米加35%、英欧14%)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

米国トップ志向

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

4. 日本家庭の制度的入学難易度

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

海外在住歴2年以上で経路あり

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Gr9以下は本人または親の片方が非日本国籍必須

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

5. 校風

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

アットホーム / 小規模 / 家庭的

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

伝統 / フォーマル / お嬢様学校

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

6. 卒業要件の宗教教育

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Religious and Cultural Exploration 3単位

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Values 1単位

The results of the graduating class of 2025 demonstrate the high level of education.

違い①: カリキュラム — IB一貫 vs APベース

清泉は幼稚部のモンテッソーリからGrade 12のIB Diplomaまで、探究型学習を一貫して設計しています。一方、聖心は米国式カリキュラムをベースに、Grade 11-12で24科目のAP(Advanced Placement)を提供。「探究の一貫性」を重視するなら清泉、「米国大学進学を見据えた科目別深掘り」を重視するなら聖心、という構図です。

違い②: 学業実績の見え方

両校とも世界トップレベルの学力ですが、評価指標が異なります。

  • 清泉: IB Diploma平均35点、合格率97.7%(2025年)。世界平均30.58を+4.4上回る
  • 聖心: AP平均4.27/5、3+が93%(2025年)。301試験を実施

IBは「総合的な学力と探究」を、APは「科目別の到達度」を測ります。どちらも世界の大学が高く評価する資格ですが、可視化される強みの形が異なるため、家庭の進路観に応じた選択が必要です。

違い③: 進学傾向 — 多地域分散 vs 米国トップ志向

清泉のClass of 2024はJapan & Asia 39%、US & Canada 35%、UK & Europe 14%という多地域分散型。一方、聖心はHarvard、Yale、Brown、Cornell、Dartmouth、UPenn等の米国アイビーリーグ進学に厚みがあります。

「米国一流私大を本気で目指す」なら聖心、「世界中のどこにでも進学できる柔軟性」なら清泉、という棲み分けです。

違い④: 日本家庭の制度的入学難易度

ここが実務上、最も重要な違いです。

聖心はGrade 9以下の出願者は、本人または親のどちらかが非日本国籍であることが原則(公式Admissions Policy)。日本国籍のみの家庭は、Grade 10-12のみ出願可能となります。

一方、清泉は「海外在住歴2年以上の日本人生徒」「国際校からの転入」など日本永住家庭にも一定の経路があるという運用です。日本のみの永住家庭にとって、清泉の方が制度的に入学しやすいという構造があります。

違い⑤: 校風 — アットホーム vs 伝統

校風は、両校の歴史と立地が反映されています。

  • 清泉: 1962年創立、世田谷区用賀。約700名の小規模校で、「アットホームな雰囲気」「親しみやすい保護者コミュニティ」「先生と生徒の距離が近い」という評価が中心
  • 聖心: 1908年創立、渋谷区広尾。「伝統」「お嬢様学校」「フォーマル」というイメージが残るが、実際は親しみやすい雰囲気との評判

違い⑥: 卒業要件の宗教教育

両校ともカトリック校ですが、宗教教育のカリキュラム上の比重が異なります。

  • 清泉: 卒業要件にReligious and Cultural Exploration(宗教・文化探究)3単位が含まれる
  • 聖心: 卒業要件はValues(価値)1単位のみ

清泉の方が「宗教教育がカリキュラムに組み込まれている度合い」が高いと言えます。ただし両校ともノンクリスチャンを歓迎する姿勢で、改宗を求めることはありません。

聖心の詳細はこちらの記事で解説しています。

1. In-Depth Comparison: Seisen vs. ISSH — What Are the Key Differences?

6. 学費の完全解説 2025-2026年度

清泉の学費は、東京の他のインターナショナルスクールと比較して中位帯に位置します。

年間学費(2025-2026年度)

学年

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

授業料

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

建物維持費

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

年間合計

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

幼稚部(全日)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

2,200,000円

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

100,000円

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

2,300,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

初等部(Grade 1-5)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

2,350,000円

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

100,000円

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

2,450,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

中等部(Grade 6-8)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

2,370,000円

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

100,000円

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

2,470,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

高等部(Grade 9-12)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

2,370,000円

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

100,000円

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

2,470,000円

The results of the graduating class of 2025 demonstrate the high level of education.

入学時のみ必要な初期費用

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

金額

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

出願料(Application Fee)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

20,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

登録料(Registration Fee)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

300,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

土地建物開発費(Capital Levy)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

500,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

初期費用合計

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

820,000円

The results of the graduating class of 2025 demonstrate the high level of education.

出願料を除く2項目(80万円)は入学時のみ支払う費用で、退学時の返金はありません。

初年度総費用シミュレーション

Grade 1-5に新規入学する場合の最低ラインは以下の通りです。

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

金額

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

授業料(Grade 1-5)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

2,350,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

建物維持費

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

100,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

出願料

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

20,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

登録料

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

300,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

土地建物開発費

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

500,000円

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

初年度総額

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

3,270,000円

The results of the graduating class of 2025 demonstrate the high level of education.

これに、Pad購入(Grade 3以上)、制服、Field Trips費用、IB試験料(Grade 11-12のみ・科目あたり約20,000円)等が別途必要となります。実務的には初年度約350万-380万円程度を見込むのが現実的です。

学費レベルの位置づけ

東京のインターナショナルスクールの年間学費は約230万-500万円の幅がありますが、清泉は中位帯(230万-250万円)に位置します。聖心ISSH(年間学費約280万-290万円)と比較するとやや低めの設定です。

「IB一貫教育」「過去3年連続のIB高実績」「東大・京大・早慶への進学実績」を考慮すると、学費に対するコストパフォーマンスは非常に高いと言えます。

7. 「カトリック女子校」の実態 — 卒業要件3単位の宗教教育とは

清泉は、カトリック系女子校の中でも宗教教育がカリキュラムに明確に組み込まれている学校です。これは表面的な「祈りの時間」レベルではなく、卒業要件として高校でReligious and Cultural Exploration 3 creditsを履修する設計です。

Religious and Cultural Explorationとは

「宗教・文化探究」と訳されるこの3単位は、Grade 9-12にかけて履修する高校卒業要件です。内容は単なる「カトリック教義の暗記」ではなく、キリスト教を中心に世界の宗教・文化を体系的に学び、多元的視点を育てるプログラムです。

具体的な学習内容には以下が含まれます。

  • 旧約聖書・新約聖書の理解
  • カトリックの倫理学
  • 世界の宗教の比較(仏教、ヒンドゥー教、イスラム教、ユダヤ教等)
  • 倫理的ジレンマの議論
  • 奉仕活動(Community Service)の実践

"God comes first" — Guiding Statementsの意味

清泉のGuiding Statementsには「God comes first」という言葉が掲げられています。これは「神を第一に置く」という意味で、清泉の教育の根幹を表しています。

ただし、これは「キリスト教徒のみを受け入れる」という意味ではありません。清泉はノンクリスチャン家庭を積極的に受け入れる方針で、実際に在校生の多くは非カトリックです。むしろ、「自分とは異なる信仰や価値観を尊重する姿勢」を、カトリック教育を通じて学ぶ場としてのスタンスを取っています。

朝の祈り、ミサ、宗教行事

日々の学校生活には、以下の宗教的要素が組み込まれています。

  • 毎朝の祈りで1日が始まる
  • 学年に応じたミサへの参加
  • クリスマスページェント(クリスマス前のキリスト誕生劇)
  • Easter(復活祭)の祝祭
  • 校内の聖母マリア像や宗教画

これらは「強制ではなく、参加する文化」として運営されており、ノンクリスチャンの生徒も自然に文化として体験することになります。

ノンクリスチャン家庭の実態

清泉に通うノンクリスチャン家庭の保護者の声には、「最初は宗教色が強いと感じたが、実際は『他者への思いやり』『奉仕の精神』『自己の振り返り』という普遍的価値の教育として捉えられる」というものが多く聞かれます。

聖心との比較

聖心は卒業要件がValues 1単位のみで、清泉と比べて宗教教育のカリキュラム上の比重が軽めです。「カトリック教育の深さを体験させたい」家庭は清泉、「カトリック的価値観は大切だが宗教教育の負担は最小限にしたい」家庭は聖心、という選択軸が成立します。

聖心の詳細はこちらの記事で解説しています。

1. In-Depth Comparison: Seisen vs. ISSH — What Are the Key Differences?

8. 女子校だからこそのSTEM強化 — Firebird Science & Innovation Team

「女子校はSTEMに弱い」という従来のステレオタイプを、清泉はFirebird Science & Innovation Teamの活動で覆しています。

Firebirdとは

Firebirdは、清泉のミドル・ハイスクール生徒で構成される科学・イノベーションチームです。「女子だけのSTEAM大会出場チーム」として、国内外のコンペティションに参加しています。

公式公開のプロジェクト例

清泉公式が紹介しているFirebirdの代表的プロジェクトは以下の通りです。

プロジェクト

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

Is it okay for non-Christians?

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

高齢者孤独死対策パッチ

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

体動センサーで異常を検知し家族にアラート

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

太陽光パネル自動除塵装置

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

パネル表面の埃を機械的に除去し発電効率を維持

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

藻類ブルーム対策AI装置

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

水域の藻類異常発生をAI画像認識で検知

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

災害時ドア圧警報システム

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

地震等で歪んだドアの開閉障害を事前検知

The results of the graduating class of 2025 demonstrate the high level of education.

これらは「科学クラブの遊び」レベルではなく、実社会の課題に対する実装プロジェクトです。中学生・高校生がこのレベルの社会実装に取り組むのは、清泉でも特筆すべき活動です。

DEIJ(多様性・包摂性・公正性)の哲学

清泉はDEIJ(Diversity, Equity, Inclusion, and Justice)を学校文化として明示しており、特にDEIJページでは"women empowerment are core elements"と明言しています。「女子校=伝統的な女性像の継承」ではなく、「女子校だからこそジェンダー平等と女性のリーダーシップを育てる」という姿勢です。

STEM進学実績との連動

Firebirdの活動と、清泉の進学実績は明確に連動しています。

大学

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

注目分野

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

KAIST

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

韓国

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

理工系トップ大学

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

University of Waterloo

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

カナダ

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

コンピュータサイエンスの世界的名門

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

University of Michigan

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

米国

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

工学・コンピュータサイエンス

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

UC Berkeley

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

米国

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

STEM全般のトップ校

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Imperial College London(過去実績)

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

英国

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

STEM特化大学

The results of the graduating class of 2025 demonstrate the high level of education.

女子校でありながら、理工系世界トップ大学への進学実績を着実に積み上げている点は、清泉のユニークな強みです。

「STEM女子」を育てる学校

「女子だから理系は苦手」「数学・物理は男子向け」というステレオタイプは、清泉の校内には存在しません。男子の目を気にせず伸び伸びと理数系に取り組める環境が、Firebirdのような実装プロジェクトを生み出しています。

9. 入学要件と入試プロセス — 公式7ステップ

清泉の入試は、公式に明確化された7ステップで進行します。「ペーパーテスト一辺倒」ではなく、学力・適応性・家族の価値観を総合的に評価する設計です。

公式7ステップ

Step

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

Is it okay for non-Christians?

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

Step 1

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

オンライン出願

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Step 2

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

書類審査

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Step 3

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

学校による評価

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Step 4

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Math and English assessment(Grade 1-11全員)

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Step 5

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Family Interview(家族面接)

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Step 6

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

合否判定

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

Step 7

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

入学手続き

The results of the graduating class of 2025 demonstrate the high level of education.

出典: 清泉公式Admissions Page、FAQ

Step 1-3: オンライン出願と書類審査

出願は通年で受け付けるローリング方式で、定員に達し次第締切となります。出願時に必要な書類は以下の通りです。

  • パスポートのコピー
  • 過去2年分の成績証明書(英訳)
  • 推薦状(現在の担任または校長から)
  • 健康診断書
  • 出願者本人と保護者の写真

Step 4: Math and English assessment(Grade 1-11全員)

清泉公式がStep 4で全Grade 1-11受験者にMath and English assessmentを実施すると明記しています。これは英語の読解・作文と数学の基礎学力を測るテストです。

幼稚部(K3-K5)受験者は個別面接+遊びを通した行動観察の形式で、ペーパーテストはありません。「初対面の大人と目を合わせて話せるか」「おもちゃをシェアできるか」「指示を理解して行動できるか」等が評価されます。

Step 5: Family Interview(家族面接)

家族面接は、両親と本人の出席が必須です。面接で評価される軸は以下の通りです。

評価軸

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

具体的に問われる内容

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

学術的好奇心

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

「最近、何に夢中になっている?」「読んでいる本は?」

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

志望動機

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

「なぜ清泉なのか」「他の学校でなく清泉を選ぶ理由」

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

家族の教育観

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

「家庭でどのような価値観を大切にしているか」

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

カトリック教育の理解

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

「Religious and Cultural Explorationを受け入れる準備があるか」

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

学校文化への適合

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

「清泉のアットホームな環境にお子様は適応できるか」

The results of the graduating class of 2025 demonstrate the high level of education.

Step 6-7: 合否判定と入学手続き

合否判定は通常、家族面接後2-4週間以内に通知されます。合格の場合は入学手続き(登録料・土地建物開発費の支払い)に進みます。

編入の空き状況

清泉のKindergartenは特に競争が激しく、定員に達するタイミングは早めです。一方、Grade 6以降は欠員に応じて編入受け入れが行われるため、タイミング次第で機会があります。

EAL(English as an Additional Language)の限定的提供

公式Admissions Policyに「EAL programmeの席数はlimited(限定的)」と明記されています。「資格を満たしても席がなければ難しい」という運用です。

そのため、清泉の主対象は「英語教育を必要とするexpatriate families(駐在員家庭)」と公式に位置づけられており、英語力が不十分な日本国籍家庭の入学は実務上ハードルが高いと理解しておく必要があります。

保護者の英語要件

公式Admissions Policyに「保護者の英語コミュニケーション能力」が要件として明記されています。学校との連絡(保護者会、教員面談、緊急連絡等)はすべて英語で行われるため、少なくとも保護者1名が英語で実務的にコミュニケーションできる必要があります。

10. 入試対策の年齢別ロードマップ

ELTがこれまでサポートしてきた合格家庭の準備期間から逆算した、実用的な準備ロードマップを提示します。

幼稚部(K1-K3)志望

時期

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

やるべきこと

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

受験18ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

英語の基礎接触(簡単な挨拶、単語、絵本)

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験12ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

プレイデート形式の慣れ、生活習慣(挨拶、片付け)

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験6ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

個別面接対策、英語の自己紹介練習

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験3ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Family Interview対策、保護者の動機整理

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験1ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

面接練習、想定問答

The results of the graduating class of 2025 demonstrate the high level of education.

小学校編入(Grade 1-5)志望

時期

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

やるべきこと

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

受験12ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Math and English assessmentの基礎力構築、英語強化

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験6ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

ELTの清泉対策パッケージ申込推奨

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験3ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

過去2年成績の英訳、推薦状依頼

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験1ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Family Interview対策、英語エッセイ練習

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験当日

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Math and English assessment + 家族面接

The results of the graduating class of 2025 demonstrate the high level of education.

中高編入(Grade 6-12)志望

時期

In short, it's not a problem at all. Many of the students are not Christian. While there are daily prayers and Religious Knowledge classes, these are not intended to force belief but are positioned as part of a character education program to foster a sense of gratitude and ethics. Many parents comment positively, saying, "Through religious events, my daughter has developed a spirit of compassion and service."

やるべきこと

At Seisen, the student council president, sports team captains, and science competition leaders are all girls. By spending their formative years in an environment free from unconscious biases like "boys are better at STEM" or "leaders are men," students naturally develop the confidence that "women can be anything." In fact, it is Seisen's female students who excel in global robotics competitions and science fairs (such as the Firebird team).

受験12ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

英語をCEFR B1-B2へ、IB MYP/DPの予備学習

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験6ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

Math and English assessment対策、エッセイライティング

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験3ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

推薦状、IGCSEまたはIB継続性の確認

If you hope for your daughter to possess both kindness and intellect, and want her to take on challenges in STEM and leadership, Seisen is undoubtedly one of the best environments you can choose.

受験1ヶ月前

At ELT, our native-speaking instructors, who are well-versed in Seisen's admission trends (including Montessori-style observational assessments and MAP test preparation), will support your child's journey to acceptance. We offer comprehensive consulting, from parent interview practice to application essay guidance. Why not start with a free counseling session to assess your child's current English level and chances of admission?

面接練習、MYP/DPでの志望理由構築

The results of the graduating class of 2025 demonstrate the high level of education.

「今から間に合うか」の判断基準

ELTのカウンセリングで最も多い質問が「今から間に合うか?」です。判断基準は以下の通りです。

  • 12ヶ月以上の準備期間がある: 通常合格圏に入る
  • 6-12ヶ月の準備期間: 集中的な対策で十分可能
  • 3-6ヶ月の準備期間: 英語力・基礎学力が既にある場合に限り可能
  • 3ヶ月未満: 英語力・基礎学力が高いケースを除き、次年度への延期を推奨

11. ELTが分析する「清泉に合格する家庭」の特徴

ELTは、Year 7新規入学からGrade 6-11編入、Grade 12 Sixth Form入学まで、多数の清泉合格をサポートしてきました。その経験から見えた、合格する家庭に共通する5つの特徴を共有します。

特徴①: IB一貫教育の意義を理解している

合格する家庭は、「英語が学べるから」「インターだから」というレベルを超えて、なぜIBなのか、なぜ清泉のIB一貫教育を選ぶのかを明確に説明できます。「探究型学習」「批判的思考」「世界中で通用する卒業資格」というIBの本質を、家庭の教育観として整理できているかが鍵です。

特徴②: カトリック教育を受け入れるスタンス

清泉の卒業要件にRelegious and Cultural Exploration 3単位が含まれることを理解し、「カトリック教育を子どもに受けさせる選択」を家族として明確に決断していることが重要です。「ノンクリスチャンだけど大丈夫?」と不安そうに尋ねるのではなく、「カトリック的な倫理観・奉仕の精神を子どもの人格教育の一部として歓迎する」というスタンスが面接で評価されます。

特徴③: 学校との英語コミュニケーションが完結する

清泉の保護者連絡は基本的に英語です。少なくとも保護者1名が英語で実務的にコミュニケーションでき、子どもの学校生活に積極的に関わる姿勢が必要です。

特徴④: 多地域進学を視野に入れている

「日本のトップ大学一辺倒」ではなく、世界中の大学を視野に入れた進路観を持つ家庭が清泉に向いています。Class of 2024の進学先内訳(日アジア39%、米加35%、英欧14%)を見て「これが理想的」と感じる家庭は、清泉の文化と整合します。

特徴⑤: 小規模アットホームコミュニティへの適性

清泉は約700名の比較的小規模な学校で、教員と生徒の距離が近い「家庭的な雰囲気」が特徴です。「先生に丁寧に見守られる環境を求める」「保護者同士の親しみやすいコミュニティを求める」家庭に向いています。一方、「大規模校での多様な人間関係」「フォーマルで伝統的な学校環境」を求める家庭には、聖心の方が適合します。

Year別の合格者プロファイル例

ELTがサポートしてきた合格者の典型的なプロファイルを紹介します。

  • Kindergarten新規入学: 都内私立幼稚園または海外駐在帰国の3-5歳児。英語の基礎接触あり、家族で清泉のキャンパスツアーに参加し、ハウス(教室)の雰囲気を確認
  • Grade 1-5編入: 海外帰国子女、または都内インターからの転校。英語力CEFR A2-B1相当。Math and English assessment対策を6-12ヶ月実施
  • Grade 6-11編入: IBインター在籍中、または英語強化校からの編入。英語力B2相当。MYP予備学習またはIB DPに向けた科目選択の事前検討
  • Grade 12 Sixth Form入学: 海外帰国子女または英語インター卒。Full IB Diplomaを目指すかIGCSE選択かを早期判断

12. 清泉に向いている家庭・向いていない家庭

正直に申し上げると、清泉はすべての家庭に向く学校ではありません。年間230万-250万円の学費、初年度総額約330万-380万円、そしてIB一貫教育という選択を考えると、家族の価値観と教育観の適合度を慎重に判断すべきです。

向いている家庭

  • IB一貫教育(PYP/MYP/DP)を求める家庭 — 探究型学習を子どもに受けさせたい
  • 多地域進学を視野に入れている家庭 — 米国、英国、日本、アジア、欧州への柔軟な選択肢
  • アットホームな環境を求める家庭 — 小規模で先生と生徒の距離が近い文化
  • カトリック教育の深さを歓迎する家庭 — 卒業要件3単位の宗教・文化探究を価値教育として受け入れる
  • 日本国籍のみだが海外在住歴のある家庭 — 聖心と比べて清泉の方が制度的に入学しやすい
  • 女子校でリーダーシップとSTEMを伸ばしたい家庭 — Firebird Teamのような実装プロジェクト

向いていない家庭

  • APベースの米国型カリキュラムを求める家庭 — 聖心ISSHが適合
  • 大規模校での多様な人間関係を求める家庭 — ASIJ、清泉以外のインターを検討
  • カトリックの宗教教育を最小限にしたい家庭 — 聖心はValues 1単位のみで、清泉より宗教カリキュラムが軽め
  • 日本のトップ大学(東大・京大の一般入試)を主目標とする家庭 — IB DP+一般入試の両立は困難
  • 英語が話せず、学校とのコミュニケーションを子に依存する家庭 — 緊急時のリスクが高い

「清泉と聖心のどちらか迷っている家庭」への判断指針

迷っている場合、以下の5つの問いで答えが見えてきます。

  1. IB一貫の探究型学習を求めるか、科目別深掘りのAPを求めるか
  2. 多地域進学を視野に入れるか、米国トップ大志向を持つか
  3. アットホームな小規模校を求めるか、伝統的な雰囲気を求めるか
  4. カトリック教育の深さを歓迎するか、宗教教育は最小限を望むか
  5. 日本国籍のみの家庭か、非日本国籍のメンバーがいる

これらの問いに対して、3つ以上で清泉寄りの回答が出る家庭は、清泉が適合する可能性が高いと言えます。

14. ELTの清泉受験対策:合格までの一貫サポート

ELTは、Kindergarten新規入学からGrade 1-11編入、Grade 12 Sixth Form入学まで、すべての学年でSeisen合格をサポートしてきました。「IB一貫校としての清泉の入試特性」「カトリック教育の家庭との適合性」「Math and English assessmentの専門対策」を踏まえた一貫サポートを提供しています。

ELTの清泉受験対策の特徴

  • Math and English assessment対策: 英語の読解・作文と数学の基礎学力を、Grade別に最適化したカリキュラムで強化
  • 英語強化: CEFR B1-B2(Grade 6-11編入)、CEFR B2-C1(Grade 12 Sixth Form)を目指すマンツーマン指導。CELTA/DELTA保有のネイティブ講師
  • Family Interview対策: 清泉のカトリック教育・IB哲学に沿った志望動機の構造化、家族面接ロールプレイ
  • 幼稚部対策: 個別面接+行動観察に対応した、遊びを通したコミュニケーション練習
  • 願書作成サポート: 過去2年成績の英訳、推薦状依頼の助言、エッセイ添削
  • 編入対応: IGCSE / IB MYP / DP の継続性確認、IB予備学習

こんな家庭にELTは選ばれています

  • 清泉と聖心のどちらが家族に合うか判断できない家庭
  • Math and English assessmentの対策方法が分からない家庭
  • Family Interviewでカトリック教育への適合性をどう語ればよいか分からない家庭
  • Year 6以降の編入を検討しているが、現在の英語力で足りるか判断できない家庭
  • 1度不合格になり、次年度の再挑戦戦略を立てたい家庭

無料カウンセリングのご案内

「現在の英語力や成績で清泉の合格ラインに届くか知りたい」「Math and English assessment・面接の具体的対策をプロに任せたい」「Kindergarten新規・Grade 1-11編入・Grade 12 Sixth Formのどれが最適か診断してほしい」、こうしたお悩みに、合格実績豊富なコンサルタントが個別にお応えします

Frequently Asked Questions

A

International schools that adopt British, American, or IB curricula do not use the concept of 'hensachi' (deviation scores). Instead, the IB Diploma Programme score (out of a maximum of 45 points) serves as an academic indicator. Seisen's 2025 DP average is 35 points, which is 4.4 points above the world average of 30.58. In terms of Japanese hensachi, this is often understood as being comparable in difficulty to the most selective combined junior and senior high schools in Japan.

A

The annual school fees, including tuition and the building maintenance fee, range from 2.3 to 2.47 million JPY (for the 2025-2026 school year, depending on the grade level). In the first year, an initial fee of 820,000 JPY is added, bringing the minimum total for Grades 1-5 to approximately 3.27 million JPY. When you add the costs for uniforms, an iPad, IB examination fees, field trips, etc., the practical total for the first year is about 3.5 to 3.8 million JPY.

A

Yes, Seisen actively welcomes families from non-Christian backgrounds. In fact, many of our current students are not Catholic. However, since the graduation requirements include 3 credits in Religious and Cultural Exploration, a willingness to accept Catholic education as part of the curriculum is necessary.

A

The official Admissions Policy explicitly states 'English communication ability for parents' as a requirement. As all communication with the school is conducted in English, it is necessary for at least one parent to be able to communicate effectively in English for practical purposes. A level equivalent to CEFR B1-B2 (Eiken Grade 2 to Pre-1) is a general guideline.

A

Yes, for Grade 1 and above, all applicants are required to take a Math and English assessment. A Family Interview is also mandatory. For Kindergarten, the assessment is in the form of an individual interview and behavioral observation.

A

Both are world-class international schools for girls, but they are fundamentally different. Choose Seisen if you are looking for a full IB education and pathways to universities in various regions; choose Sacred Heart if you prefer an AP-based curriculum with a focus on top US universities. There is also a difference in that it is institutionally easier for families with only Japanese nationality to enroll at Seisen. For more details, please refer to the 'H2-5 Seisen vs. Sacred Heart' section of this article.

A

The 2025 DP average was 35 points, with a pass rate of 97.7%, 43 candidates, and 8 students scoring 40 points or higher (official Seisen data). For the past three consecutive years (2023-2025), the school has maintained a stable record with an average score of 34-35 points and a pass rate of 97.6-97.8%, consistently exceeding the world average by 3.7-4.4 points each year.

A

There are no official fixed score requirements, but based on data from successful applicants, the following are general guidelines:

  • Kindergarten-Grade 2: Basic greeting level (e.g., 'Hello, my name is...')
  • Grade 3-5: Equivalent to CEFR A2-B1 (Eiken Grade 3 to Grade 2)
  • Grade 6-9: Equivalent to CEFR B1-B2 (Eiken Grade Pre-2 to Pre-1)
  • Grade 10-12: Equivalent to CEFR B2-C1 (Eiken Grade Pre-1 to Grade 1)
A

The full IB Diploma is a powerful passport to top universities worldwide, but it involves the burden of completing six subjects plus TOK, the EE, and CAS. On the other hand, choosing the IGCSE path offers flexibility, allowing students to obtain a British-system qualification while avoiding subjects they find difficult. We recommend making the decision by working backward from your target universities (i.e., whether they require the IB Diploma or accept applications with A-levels/IGCSEs).

A

Seisen graduates matriculate annually to top domestic universities, including those at the level of Waseda, Keio, Sophia, and ICU. Sophia University has a special admission process for designated Catholic high schools (recommendation-based admission), and Seisen is one of the eligible schools. The specific number of available spots varies by faculty and year.

A

We offer a wide variety of clubs, including the Firebird Science & Innovation Team, Model United Nations, Drama Club, Choir, various sports teams (basketball, volleyball, cross country, etc.), Medical Career Club, AI Club, and Environmental Action Club.

A

Yes, very strong. The Firebird Science & Innovation Team works on applied projects such as a 'patch to prevent isolated deaths among the elderly' and an 'automatic dust removal device for solar panels,' and has a consistent track record of sending graduates to prestigious engineering and science universities like KAIST, Waterloo, Michigan, and UC Berkeley.

A

Yes, Seisen has admission pathways for Japanese national families who have lived abroad for two or more years, or for families transferring from other international schools. In contrast, Sacred Heart (ISSH) does not accept applications from families with only Japanese nationality for Grade 9 and below (only for Grades 10-12). Due to this policy difference, it is institutionally easier for Japanese families permanently residing in Japan to enroll at Seisen. However, the student's English proficiency and the parent English requirements must still be met.

A

We recommend starting at least 12 months in advance. Starting 6 months before makes preparing for the Math and English assessment and the interview a race against time, and with only 3 months, there isn't enough time to fundamentally improve English proficiency. For Kindergarten applicants, it is safest to start preparing 18 months or more in advance, including establishing daily routines and basic exposure to English.

About the Author

Tatsuya Tanaka

Tatsuya Tanaka

Representative Director, ELT Japan

After graduating from the Department of Mechanical Engineering at the Faculty of Science and Engineering, Waseda University, he pursued graduate studies at the same university, focusing on research in computational fluid dynamics. During his graduate studies, he worked as a visiting researcher at Rice University in Houston, USA, where he was involved in fluid simulations for spacecraft. After returning to Japan, while continuing his research, he also organized career fairs at Harvard University and Imperial College London. In 2019, while still a student, he established Sekijin LLC (now ELT Education Inc.). In 2020, he partnered with the UK-based company ELT School of English Ltd. to launch an online English conversation business for the Japanese market. Since its founding, he has provided counseling to over 1,000 English language learners.

LinkedIn

Related Articles