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Rugby School Japan (RSJ): Tuition, Academic Standards, and Reputation | An Admissions Strategy Based on University Placements

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Published:
2026 Latest
ラグビースクール・ジャパン(RSJ)完全ガイド:学費・偏差値・入試対策・進学実績を徹底解説【2026年最新版】 - ELTスクール 英語学習コラム
Tatsuya Tanaka

Author: Tatsuya Tanaka|Representative Director, ELT Japan

"Is it true there's a prestigious British boarding school accessible from central Tokyo?" "I want to know about the annual fees, academic standards, and admissions difficulty."

Opened in 2023 in Chiba's Kashiwa-no-ha Smart City, Rugby School Japan (RSJ) has captured the intense interest of education-focused families. As a branch of one of the UK's 'Original Nine' public schools, its prime location just 30 minutes from central Tokyo makes it highly attractive.

However, many families have questions like, "What are its academic standards?" or "Which is better: being a day student or a boarder?" In this article, ELT, with extensive experience in supporting successful applications to British boarding schools, will provide a thorough analysis of RSJ's 'true value' and the 'admissions strategy to secure a place,' based on official data and our unique expertise.

1. The DNA of a Prestigious British School: 'The Whole Person' and an Unparalleled Learning Environment

The most defining feature of RSJ is its philosophy of 'The Whole Person, The Whole Point,' which is not just a slogan but fully integrated into the daily life of the school.

While a typical day school in Japan offers around 1,000 hours of learning time per year, RSJ integrates 'intellectual and co-curricular activities' from 7:00 to 22:00, Monday to Friday, plus Saturday mornings. This results in a total annual activity time of approximately 3,000 hours. The school's philosophy is consistently applied to foster not only academic achievement but also physical, creative, and emotional growth, developing resilient individuals through lessons, sports, music, art, community action, and supervised self-study.

2. Fee Breakdown and the Unique 'Three Flexible Styles'

In contrast to Harrow Appi, which is a full boarding school in a natural setting, RSJ's urban location offers the appeal of choosing from three day and boarding styles to suit your family's educational philosophy.

  • Day Pupil: Pay tuition only and commute from home (meals are billed separately).
  • Weekly Boarder: Spend an intensive week in the boarding house from Monday to Friday and return to family for the weekend. This is a very popular option among affluent families in Japan.
  • Full Boarder: Fully immerse in the school community and participate in activities, including weekends.

Crucially, all students, regardless of their status, belong to a House. Each House has dedicated staff, providing a framework for students to develop decision-making and interpersonal skills within a supportive community.

Estimated Annual Costs (Tuition + Boarding) for 2025/26

The following are the officially published annual fees for 'Tuition + Boarding'.

Year Group

Day

Weekly

Full

Year 7

¥4,500,000

¥7,400,000

¥7,700,000

Year 8–9

¥4,750,000

¥7,650,000

¥7,950,000

Year 10–11

¥5,300,000

¥8,200,000

¥8,500,000

Year 12–13

¥5,500,000

¥8,400,000

¥8,700,000

Actual Costs Could Approach ¥10 Million Annually

In addition to the amounts above, the following fees are also required at RSJ:

  • One-time Entrance Fees: Application Fee ¥40,000, Admission Fee ¥500,000, School Development Fee ¥500,000.
  • Annual Fees: A Facilities Maintenance Fee of ¥500,000 is charged annually.
  • Meal Costs: Billed separately, with estimated annual costs of approximately ¥230,000 for Day Pupils, ¥620,000 for Weekly Boarders, and ¥830,000 for Full Boarders.

When all these costs are combined, the actual annual expense, particularly for a Full Boarder in the upper years, can be in the range of ¥10 million.

3. Does Rugby School Japan Have a 'Hensachi' Score? (Academics and University Destinations)

International schools that follow a British curriculum do not use the concept of 'hensachi' (academic deviation scores). RSJ uses the IGCSE curriculum for ages 14-16 and A-Levels for ages 16-18 (assessed by external examinations), managing academic achievement against clear attainment standards.

Read article

The British Curriculum (A-Level / IGCSE) Explained: The Power of Specialization for University Pathways

Exceptional University Placements

Despite being a new school, its university placement record is already world-class. According to an official release from RSJ, its first leavers have gone on to study at universities such as UCL, King's College London, the University of Edinburgh, McGill University, Peking University, and Waseda University. Furthermore, it has been announced that three students from the graduating class of 2026 have received early offers from the University of Oxford and the University of Cambridge (Oxbridge).

4. RSJ's Admissions Process and Expert Preparation Tips

This is not a school you can get into simply by paying the fees. Places in each year group are strictly limited, and applications are processed on a rolling basis, closing once capacity is reached.

The admissions process involves a preliminary meeting, followed by the CAT4 test, the Oxford English Placement Test, and an interview with senior faculty.

① The CAT4 (Cognitive Abilities Test) Hurdle

The most critical component of the entrance assessment is the CAT4, which measures cognitive abilities. This test does not assess 'memorized knowledge' but rather 'core reasoning abilities' (the foundation for learning and growth) across four areas: verbal, non-verbal, quantitative, and spatial. Preparation methods common for Japanese entrance exams are often insufficient, and specialized training can directly impact scores.

Read article

A Complete Guide to the CAT4 (Cognitive Abilities Test): Key to British International & Boarding School Admissions

② Required English Proficiency

While RSJ states there is 'no fixed score requirement for English proficiency,' the entire curriculum is delivered in English, so students must be able to communicate fluently at a native or near-native level. Additionally, as all practical communication with the school is conducted in English, it is essential that at least one parent can correspond in English.

③ The Most Important Component: The Interview

The interview assesses academic curiosity, motivation, and enthusiasm for co-curricular activities. RSJ is looking for individuals who are inquisitive, unafraid of failure, and motivated to contribute to society—in other words, those who embody the 'Whole Person' philosophy. The school rigorously evaluates not just academic ability but also whether a candidate is a good fit for the school's culture and values.

5. ELT's Analysis: Characteristics of Families Who Succeed at RSJ

Based on ELT's experience in guiding successful applicants, families who tend to succeed in the RSJ admissions process are those who can articulate their 'learning aptitude (CAT4 score),' 'academic curiosity,' and 'community fit (adaptability to house life)' in their own words.

It is essential to carefully prepare how to specifically discuss 'Why RSJ?', 'What have you been passionate about?', and 'How would you behave in a communal living environment?' during the interview. Furthermore, the parents' own deep commitment to RSJ's 'whole person' education—which balances sports, arts, service, and academics—is a major key to success.

'Can We Succeed with Our Current Abilities?' Get a Professional Assessment

The RSJ admissions process is unique and does not align with the know-how from Japan's cram-style exam preparation system. If you want to know if your current English level and academic record meet the admission standards, or if you'd like to entrust your CAT4 and interview preparation to professionals, we invite you to use ELT's boarding school admissions counseling service.

Our professionals, with a proven track record of numerous successful placements, will assess your child's potential (CAT4) and propose the optimal roadmap to a successful admission.

Frequently Asked Questions

A

英国式カリキュラムを採用するインターナショナルスクールに偏差値という概念はありません。代わりに、Sixth Form進級基準として「IGCSE 5科目以上でA*〜C(9〜5)取得、選択関連科目でB(6)以上」という明確な数値基準があります。日本の偏差値で言えば「最難関の全寮制中高一貫校に匹敵する難易度」と理解されることが多いです。

A

授業料+寮費の年額は、Year 7のDay Pupilで450万円、Year 12-13のFull Boarderで870万円です。これに食費(Day 23万、Weekly 62万、Full 83万)と施設維持費(年50万)が加算されるため、実質的な年額は473万円〜953万円の範囲となります。

A

Year 7でFull Boarderとして入学する場合、授業料+寮費+食費+出願料+入学金+スクール開発費+施設維持費の合計で、初年度総額は約1,007万円になります。これに制服・PC・外部試験費等を加えると、実務的には1,000万円台前半に収まるケースが多いです。

A

公式FAQでは「固定スコア要件なし」とされていますが、実務的な目安はYear 7でCEFR B2(英検準1級・IELTS 5.5+)、Year 12でCEFR C1(英検1級・IELTS 7.0+)です。英語力が不足する場合、Conditional Offer(条件付き合格)が出されることもあります。

A

CAT4の合格目安スコアは公式には公開されていません。ただしELTのサポート経験では、4領域のSAS(Standard Age Score)平均で115以上が一つの目安となります。CAT4は「学習で覚えた知識ではなく、学習し伸びる土台(learning potential)」を測るテストのため、専門的な対策が必要です。

A

公式には「15カ国からの生徒」と公表されていますが、開校初年度(2023年)はほぼ日本人で構成されていたと報告されています。2025-26年度に300名のマイルストーンを達成した時点では、海外からの生徒も増加傾向にあると推測されますが、具体的な国籍構成は非公開です。

A

全寮制ではありません。Day Pupil(通学)/ Weekly Boarder(週寮)/ Full Boarder(全寮)の3形態から選択できます。ただしどの形態でも全生徒がハウスに所属し、ハウスシステムを通じて寄宿学校のエトスを体験します。

A

2026年卒業予定の15名中3名がオックスフォード大学・ケンブリッジ大学から早期オファーを獲得しています。合格率にして20%という極めて高い水準で、新設校4年目で達成した点が注目されています。

A

両校とも英国名門校の日本姉妹校ですが、立地と運営思想が異なります。RSJは都心から30分の柏の葉でDay/Weekly/Fullを選択可能、ハロウ安比は岩手県安比高原での完全Full Boardingが中心です。「家族時間とのバランス」を重視するならRSJ、「完全な英国式ボーディング体験」を求めるならハロウ安比、という棲み分けです。

A

ローリング方式(随時受付)で、定員に達し次第締め切られます。人気のYear 7・Year 9は特に早期に締切となるため、入学希望年度の前年夏〜秋までには出願を完了するのが安全です。出願から結果通知まで約1〜2週間かかります。

A

英国Rugby School本校が運営する北海道・日高町でのサマースクールがあります。受験前の「学校との接点作り」として活用する家庭もあります。柏の葉キャンパスでのオープンデーやキャンパスツアーも定期的に開催されています。

A

可能です。ただしYear 12志望者は、CAT4・Oxford Placement・面接に加えてA-Level Assessment Papers(英語・数学必須+選択3〜4科目、各30分)を受験する必要があります。履修予定A-Level科目の事前学習が必須となるため、6ヶ月以上前から専門対策を始めることを推奨します。

A

すべての評価が終了してから約1〜2週間で結果通知が届きます。合格の場合は条件付きオファーまたは無条件オファーが提示されます。

A

再応募は可能です。ただし、不合格の理由となった領域(学力、英語力、面接での印象等)を改善した上で、次年度以降に再挑戦する形が一般的です。ELTでは不合格後の再挑戦戦略の設計もサポートしています。

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.

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