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International School of the Sacred Heart (ISSH / Sacred Heart) Complete Guide: Tuition, AP Achievement, Comparison with Seisen, and Interview Preparation Explained【2026 Edition】

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2026 Latest
聖心インターナショナルスクール(ISSH / Sacred Heart)完全ガイド:学費・AP実績・清泉との違い・面接対策を徹底解説【2026年版】 - ELT School 英語学習コラム
Tatsuya Tanaka

Author: Tatsuya Tanaka|Representative Director, ELT Japan

International School of the Sacred Heart (ISSH), located in Hiroo, Shibuya Ward, Tokyo, is a Catholic, US-style international school for girls, founded in 1908. Serving ages 3 to 18, it operates as a coeducational institution in Kindergarten (K3-K5) only, with Grades 1-12 as an all-girls school. As a member of the Sacred Heart Sisters network of 160+ schools worldwide, ISSH enrolls approximately 580 students from over 50 countries.

The school offers 24 Advanced Placement (AP) courses, with a 2025 AP average score of 4.27/5, a 93% pass rate (score 3+), and 301 examinations taken—top-tier performance among US-style international schools. The Class of 2023-2025 acceptances include Harvard, Yale, Brown, Cornell, Dartmouth, UPenn, Cambridge, and UCL, among other world-leading universities. Annual tuition is approximately ¥3.71–4.03 million (2026-2027 estimate), with a distinctive policy that students holding only Japanese nationality may apply only to Grades 10-12.

"I want to seriously pursue admission to a top US Ivy League university"

"I seek depth in AP-based specialization"

"I'm drawn to the culture of a 100+ year heritage institution"

This article is prepared by ELT, which has supported numerous ISSH acceptances, drawing on official data and proprietary teaching expertise to provide comprehensive insight into ISSH and the pathway to acceptance.

For details on Seisen International School, please refer to the article below.

Read article

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

1. International School of the Sacred Heart (ISSH) — Core Information in 5 Minutes

International School of the Sacred Heart is Japan's oldest international girls' school, founded in 1908 in Hiroo, Tokyo. Established by the Society of the Sacred Heart, a congregation founded in France in 1800, ISSH has been a member of the global network of 160+ sister schools and has led international education for girls in Japan for over 115 years.

School Essentials

Item

Details

Official Name

International School of the Sacred Heart

Founded

1908

Location

Hiroo, Shibuya Ward, Tokyo

Grade Range

Kindergarten (age 3) to Grade 12 (age 18)

Coeducational / Single-Sex

Coeducational for Kindergarten (K3-K5) only; Grades 1-12 all-girls

Enrollment

Approximately 580 students (K-12 total)

Nationalities Represented

Over 50

Curriculum

K-12 in-house curriculum + Advanced Placement (AP)

Language of Instruction

English (all classes taught in English)

Accreditations

NEASC, CIS, Japanese Ministry of Education

Founding Organization

Society of the Sacred Heart (established in France, 1800)

Sister School Network

Network of Sacred Heart Schools (160+ schools worldwide)

"Oldest in Japan" Heritage and Modernization

ISSH's 115+ year history mirrors the history of girls' international education in Japan.

  • 1908: Founded by the Society of the Sacred Heart—one of Japan's earliest girls' international schools
  • Pre-, During, and Post-War: Continued operations through wartime disruption
  • Since 1908: Over 100 years supporting global education in Japan, primarily serving families of expatriates
  • Today: AP adoption, expansion to 24 courses, digital education integration—a heritage institution that continuously evolves

"Over 100 years of heritage + modern US-style education" is one of ISSH's defining characteristics.

Shared Campus with Sacred Heart University

ISSH shares the same campus with Sacred Heart University, Tokyo (University of the Sacred Heart), which provides several advantages:

  • Middle-to-University Integration: Access to university facilities and special lectures by university faculty
  • Recommended Admission: Eligible for school-recommended admission to Sacred Heart University
  • Role Models: University students on campus serve as mentors and future-oriented examples

Sacred Heart University is among Tokyo's leading heritage women's universities and maintains international orientation through its English-language degree program. Fostering female leadership through "an integrated Sacred Heart network spanning secondary and university education" is a structurally distinct value unique to ISSH.

2. ISSH Curriculum — Anglosphere In-House Curriculum + AP

ISSH's curriculum structure is not the International Baccalaureate (IB), but rather a "school-designed Anglosphere curriculum + AP". This represents a fundamentally different educational philosophy from Seisen's IB-integrated approach and is the most critical distinction when choosing between the two schools.

K-12 In-House Curriculum Structure

ISSH operates a proprietary, school-designed curriculum across K-12, synthesizing educational standards from English-speaking countries (Anglosphere): the United States, United Kingdom, Canada, and Australia. Rather than adopting external frameworks like the IB or Cambridge IGCSE, ISSH takes responsibility for curriculum design aligned with Sacred Heart Goals—the school's educational philosophy.

Advanced Placement (AP) in Upper Grades

In Grades 11-12 (or from Grade 10 with acceleration), students study primarily College Board Advanced Placement (AP). AP's defining characteristics are:

Feature

Details

Number of Courses Offered

24 courses (2025-26 academic year)

Enrollment Model

Individual course selection on a year-by-year basis (not a required package like IB)

Scoring

5-point scale (1-5). Score 3+ indicates "pass"; 4-5 indicates "advanced"

University Recognition

Recognized by leading universities worldwide, particularly US institutions

University Credit

Often qualifies for college credit at US universities

Read article

The Complete Guide to AP (Advanced Placement) [2026 Edition] | Subject List, Exam Dates, Scores, and College Credit

Essential Differences Between IB and AP

Understanding the fundamental differences between IB and AP is essential for parents choosing between ISSH and Seisen.

Aspect

AP (ISSH)

IB Diploma (Seisen)

Structure

Individual course-based standardized tests

Package of 6 courses + TOK + EE + CAS

Flexibility

High (students may take more courses in subjects of strength)

Low (one course per group of 6 mandatory)

Specialization

Deep expertise in individual subjects

Balanced proficiency across disciplines

University Alignment

Optimized for US universities

Recognized by universities worldwide

Assessment

Standardized exam (once per year)

Standardized exam + internal assessment + Extended Essay

Choose AP (ISSH) if you aim to cultivate depth in specific subjects and pursue top US universities; choose IB (Seisen) if you prioritize balanced development while building credentials recognized internationally.

Read article

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

AP Capstone — ISSH's Distinctive Research Program

ISSH offers the AP Capstone Diploma program, combining "AP Seminar" and "AP Research"—a research initiative equivalent to the IB Extended Essay (EE).

  • AP Seminar (Grade 11): Students learn research methodology and argumentation
  • AP Research (Grade 12): Students produce a 5,000-word independent academic thesis

AP Capstone addresses the absence of IB at ISSH and is valued equally to IB Diploma by top US universities.

3. Latest 2025 AP Results and Three-Year Track Record

ISSH's AP performance demonstrates consistent excellence above global averages over three consecutive years.

Three-Year AP Results

Year

Total Exams Taken

Average AP Score

Pass Rate (Score 3+)

Perfect Score Rate (Reference)

2025

301 exams

4.27 / 5

93%

High

2024

253 exams

3.8 / 5

86%

–

2023

238 exams

3.95 / 5

90.3%

–

Source: ISSH High School Profile

What These Numbers Mean

Three consecutive years of AP averages between 3.8 and 4.27, with pass rates between 86% and 93%—this demonstrates institutional teaching excellence.

Notably, 2025's 4.27/5 is significant. Since the US national AP average is approximately 2.9-3.0, ISSH's students score approximately 1.3 points above the national average. This is comparable to top-tier US private schools.

Continuous Expansion of AP Offerings

ISSH's ongoing increase in AP courses is noteworthy:

Year

AP Courses Available

2023-24

22 courses

2024-25

23 courses

2025-26

24 courses

This trajectory reflects the school's commitment to AP and expanding options for specialized academic development.

Growth in Exam Volume

The rise from 238 to 253 to 301 total exams indicates an increase in the average number of AP courses per student, reflecting higher academic ambition among the student body.

The school officially states its AP performance exceeds that of international peers, a claim supported by these metrics.

4. University Admissions Outcomes — Placement at US Ivy League and British Oxbridge

ISSH's most distinctive feature in university admissions is consistent placement of students across all eight US Ivy League universities.

Note on Public Admissions Data

ISSH publishes a "2023-2025 College Acceptances" list but does not disclose matriculation data (actual enrollment) by country or university, unlike Seisen. Therefore, acceptance counts differ from actual enrollment figures. Nevertheless, the universities represented on the acceptance list reflect the school's selectivity and reputation.

Acceptances to US Ivy League and Top Private Universities

University

Category

Harvard University

Ivy League

Yale University

Ivy League

Brown University

Ivy League

Cornell University

Ivy League

Dartmouth College

Ivy League

University of Pennsylvania

Ivy League

Johns Hopkins University

Top U.S. Private Universities (Medicine & Research)

Georgetown University

Top U.S. Private Universities (International Relations)

Tufts University

Top U.S. Private Universities (Liberal Arts)

New York University

Top U.S. Private Universities

Northeastern University

Top U.S. Comprehensive Universities

Consistent admissions from 6 of the 8 Ivy League schools, excluding Princeton and Columbia—this represents one of Tokyo's most impressive track records for girls' schools aiming toward top U.S. universities.

Top U.S. Public Universities and Prestigious West Coast Institutions

University

Comment

UC Berkeley

Top-tier public university, strong in STEM and business

UCLA

Most selective California State University

University of Southern California (USC)

Prestigious West Coast private institution

University Admissions to the UK, Canada, and Japan

Region

University

UK

Cambridge, UCL, Edinburgh, Durham, King's College London, Warwick

Canada

McGill, UBC, Toronto, Waterloo, Western

Japan

University of Tokyo, Keio, Sophia, Waseda, ICU, Tsukuba, Nagoya

Notable is the confirmation of both admissions to Cambridge University and University of Tokyo. Rather than focusing solely on the United States, ISSH positions itself as a school that is U.S.-focused but strong across multiple regions.

Medical and STEM Program Examples

University

Country

Field

Semmelweis University of Medical Sciences

Hungary

Medicine

University of Debrecen

Hungary

Medicine

University of Pécs

Hungary

Medicine

University of Szeged

Hungary

Medicine

HKUST

Hong Kong

Engineering & Science

Purdue University

United States

Engineering

Rochester Institute of Technology (RIT)

United States

Technology

The placement of multiple students in Hungarian medical programs reflects ISSH's strong awareness of European English-language medicine pathways.

Recommended School Entrance (Designated School Recommendation) to University of the Sacred Heart

One of ISSH's major university pathways is Recommended School Entrance (Designated School Recommendation) to University of the Sacred Heart, Tokyo. University of the Sacred Heart shares its campus with ISSH, and longstanding coordination between the two institutions has been established over many years.

While specific recommendation allocations and faculty-based quotas are not disclosed in public materials, ISSH graduates have historically benefited from this arrangement as a reliable pathway to Japan's traditional women's universities.

5. [Critical] University of the Sacred Heart vs. Seisen—Six Essential Distinctions

For parents considering Catholic girls' international schools, the paramount question is "Should we choose University of the Sacred Heart or Seisen?" Both are Tokyo's leading girls' international schools, yet there are six essential differences spanning curriculum structure to admissions systems.

Comparison Table

Distinction

ISSH (University of the Sacred Heart)

Seisen

1. Curriculum

Anglosphere in-house curriculum + AP (24 subjects)

IB continuum (PYP/MYP/DP) + IGCSE option

2. Academic Achievement Metrics

AP average 4.27/5, 3+ represents 93% (2025)

IB average 35 points, pass rate 97.7% (2025)

3. University Placement Trends

Strong depth in U.S. Ivy League and top private universities

Geographic diversity (Japan & Asia 39%, U.S. & Canada 35%, UK & Europe 14%)

4. Admissions Accessibility for Japanese Families

Grade 9 and below requires the applicant or one parent to hold non-Japanese citizenship

Pathways available for applicants with 2+ years overseas residence

5. School Culture

1908 founding tradition / structured PA-PAC-Homeroom Parent three-tier system / Hiroo location

Warm, welcoming atmosphere / compact enrollment / Setagaya location

6. Religious Education

Delivered through Goals / Values / Spirituality framework

Required Religion classes, weekly Mass, daily prayer

Distinction 1: Curriculum—AP-Based vs. IB Continuum

ISSH employs an "Anglosphere curriculum model + 24 AP subjects" designed to allow students to deepen expertise in their stronger subjects. Conversely, Seisen follows a"PYP-through-DP IB continuum design" emphasizing inquiry-based learning.

If your goal is "targeting U.S. universities while developing deep specialization in strength areas," ISSH is the fit. If you prioritize "balanced overall development and inquiry-based learning while considering universities worldwide," Seisen aligns better.

Distinction 2: How Academic Achievement Is Measured

Both schools rank at the global apex, but their assessment metrics differ.

  • ISSH: AP average 4.27/5, with 93% achieving 3+ (2025; 301 exams)
  • Seisen: IB average 35 points, 97.7% pass rate, 8 students scoring 40+ (2025; 43 students)

AP measures "subject-specific mastery," while IB assesses "holistic intellectual capability and inquiry depth." The visible strengths differ in form, requiring family consideration of educational priorities.

Distinction 3: University Placement Trends—U.S. Ivy Focus vs. Geographic Diversity

ISSH shows significant strength in placement at U.S. Ivy League universities such as Harvard, Yale, Brown, Cornell, Dartmouth, and UPenn. By contrast, Seisen's Class of 2025 shows Japan 35%, USA 21%, Canada 14%, UK 8%—a geographically distributed pattern.

If "seriously pursuing top-tier U.S. private universities" is your priority, ISSH is optimal. For "global flexibility across placement destinations," Seisen excels.

Distinction 4: Admissions Accessibility for Japanese Families

This is the most operationally significant difference.

ISSH's official Admissions Policy requires that applicants Grade 9 and below have either the applicant or one parent hold non-Japanese citizenship. Japanese-only families may apply only at Grade 10-12.

Seisen, meanwhile, maintains pathways for Japanese permanent residents, including those with 2+ years overseas residence or international school transfer backgrounds. For Japanese resident families, Seisen presents a more accessible admissions structure.

Distinction 5: School Culture—Tradition vs. Intimate Community

Each school's character reflects its founding and setting.

  • ISSH: 1908 founding heritage. Organized parent community through PA-PAC-Homeroom Parent three-tier structure. International Hiroo location
  • Seisen: 1962 founding. Approximately 700 students with "warm, accessible atmosphere" and parent community centered on close relationships

Preference for "historic tradition and structured community" points to ISSH; desire for "intimate, welcoming environment" aligns with Seisen.

Distinction 6: Religious Education—Values Framework vs. Explicit Coursework

Both are Catholic schools, yet religious education operates distinctly.

  • ISSH: Operates through Sacred Heart Goals / Values / Spirituality framework. Values 1 credit required for graduation. Welcomes multiple faith traditions; Junior School assemblies include prayers led by students of diverse religious backgrounds
  • Seisen: Required Religion classes, weekly Mass, daily prayer as explicit curriculum components. Religious and Cultural Exploration 3 credits required

ISSH presents religious education more as values-formation and community-building, which may feel more accessible to non-Christian families. Seisen integrates Catholic practice directly into its academic structure.

Detailed analysis of Seisen can be found in the article below.

Read article

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

6. Complete Tuition Breakdown 2026–2027 Academic Year

ISSH tuition is positioned in the mid-to-upper range among Tokyo's international schools.

Annual Tuition (2026–2027 Academic Year—Projected)

Grade Level

Annual Tuition

K3–K4

¥3,710,000

K5

¥3,830,000

Grade 1–8

¥3,920,000

Grade 9–11

¥3,940,000

Grade 12

¥4,030,000

One-Time Enrollment Fees

Item

Amount

Application Fee

¥30,000

Registration Fee

¥300,000

Capital Levy (Educational & Building Development)

¥600,000

Total Initial Fees

¥930,000

First-Year Total Cost Projection

For new enrollment in Grades 1-8, the minimum baseline is as follows.

Item

Amount

Annual Tuition (Grades 1-8)

¥3,920,000

Application Fee

¥30,000

Registration Fee

¥300,000

Education and Building Development Fee

¥600,000

Total First Year

¥4,850,000

Additionally, uniform costs (Grade 1 and above), lunch service, AP examination fees (Grade 11-12 only), and field trip expenses are required separately. In practical terms, budgeting approximately ¥5,000,000–5,400,000 for the first year is realistic.

Grade 12: Annual Tuition Exceeds ¥4 Million

In particular, the annual tuition for Grade 12 (the graduation year) is ¥4,030,000, placing it at the highest level even among Tokyo international schools. This is presumed to reflect "enhanced university guidance and additional programs" at graduation.

Tuition Level Positioning

Tokyo international schools' annual tuition ranges from approximately ¥2.3 million to ¥5 million, and Sacred Heart occupies the middle-to-upper band (¥3.7 million–¥4 million). Compared to Seisen (annual tuition of approximately ¥2.3 million–¥2.47 million), Sacred Heart's tuition is approximately ¥1.4–1.6 million higher annually.

Considering the Sacred Heart network, over 100 years of tradition, and Ivy League university placement records, families' assessment of value for tuition varies significantly based on their educational objectives. If your family is seriously committed to university education at top US institutions, Sacred Heart's tuition represents a sound investment.

7. The Reality of a "Catholic Girls' School" — Implementation of Sacred Heart Goals and Values

ISSH is a Catholic girls' school founded in 1908, but its religious education is not designed as "rote memorization of doctrine." Instead, it is structured as "value-based education" centered on Sacred Heart Goals, Values, and Spirituality.

What Are Sacred Heart Goals?

More than 160 Sacred Heart sister schools worldwide, including ISSH, share a common educational philosophy called Sacred Heart Goals and Criteria.

The Foremost of Five Goals: "A Personal and Active Faith in God"

The highest principle in ISSH's education is "A Personal and Active Faith in God." This does not mean "enforcing Catholic belief," but rather fostering broader spiritual growth by cultivating "the capacity to hold one's own faith and values seriously, and to act upon them".

Welcoming Diverse Beliefs

ISSH actively welcomes students from diverse religious backgrounds, and according to official information, students represent nearly 20 unique religions, denominations, and belief systems.

Notably, during Junior School assembly, students from different religious and belief traditions lead the prayers. This is not a restrictive approach where "only Catholics may lead prayer at a Catholic school," but rather ISSH's distinctive open approach where "prayer time operates as a space that respects all faith traditions."

Graduation Requirement: The Meaning of Values 1 Unit

ISSH's high school graduation requirements include 1 unit of Values. Rather than making Theology or Bible classes mandatory, the school operates these as "values education".

Specifically, coursework includes the following topics:

  • Discussion of ethical dilemmas
  • Comparative understanding of diverse religions and philosophies
  • Examination of social justice
  • Self-discovery and community responsibility

How Multiple Faith Backgrounds Coexist

The reason ISSH is described as "a Catholic school where non-Christian families can comfortably apply" lies in the following approach:

  • While placing faith at the top of Goal 1, the school does not prescribe what that faith must be
  • Prayer from multiple faith traditions is implemented during Junior School assembly
  • Values is the sole required unit, kept to a minimum
  • Pastoral care (spiritual and psychological support) is central
  • Conversion is never required

Non-Christian parents frequently comment: "Initially, the religious emphasis seemed strong, but in practice, it is an education that respects diversity while cultivating one's own values."

Comparison with Seisen

Seisen implements mandatory Religion classes, weekly Mass, and daily prayer—a more explicit Catholic education than ISSH. Families seeking deeper Catholic experience choose Seisen; those seeking to respect Catholic values while nurturing broader spiritual growth choose Sacred Heart. This distinction creates a clear choice axis for families.

For more on Seisen, please refer to the article below.

Read article

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

8. Leadership and STEM in a Girls' School with Tradition

"Over 100 years of tradition, yet contemporary strength in leadership and STEM" — this is ISSH's distinctive character.

33 Student Council Leadership Positions and 6 Councils

ISSH's high school offers 33 student council leadership positions. The design ensures that every student holds some leadership role, rather than limiting leadership to a select few.

Specifically, each student belongs to one of the following 6 Councils:

Council

Role

Academic Council

Academic initiatives and peer support

Fine Arts Council

Arts, music, and theater activities

Social Service Council

Community service and volunteer activities

Sports Council

Sports programs and athletic events

Well-being Council

Student mental health and wellness

World Council

International exchange and global issues

All students experience a leadership role — this is a structure unique to girls' schools, institutionally ensuring an environment where girls develop leadership confidently, without social pressure from male peers.

Robust STEM Activities — Brain Bowl, Medical Society, Math Field Day, Robotics

"Girls' schools lack strength in STEM" — ISSH challenges this stereotype with multiple STEM clubs and abundant AP STEM courses.

Club / Activity

Description

Brain Bowl

Academic knowledge competition

Medical Society

Club for students interested in medicine

Math Field Day

Mathematics competition

Robotics Program

Participation in VEX Robotics program

An official comment from an ISSH parent states: "My daughter loves the robotics program, and through competition participation, her confidence has grown tremendously." This reflects not merely "it's okay for girls to do STEM," but rather the school's intentional positioning of STEM prominently.

Strength in AP STEM Courses

Among ISSH's 24 AP courses, STEM subjects include the following:

  • AP Computer Science A
  • AP Calculus AB
  • AP Calculus BC
  • AP Biology
  • AP Chemistry
  • AP Physics 1
  • AP Physics 2
  • AP Statistics
  • AP Environmental Science

These courses are significant evaluation assets in university applications for STEM majors.

Why Leadership and STEM Flourish in a Girls' School

Research shows that in coeducational and boys' schools, girls are less likely to volunteer for STEM activities. At ISSH, all student council positions and all STEM club leadership roles are held by girls, creating a culture where girls naturally view "developing leadership" and "pursuing STEM" as ordinary choices.

9. Admission Requirements and Application Process

The most critical consideration in ISSH admissions is the restriction on applications from Japanese national families.

【Most Important】 Japanese National-Only Families: Grade 10-12 Only

ISSH's official Admissions Policy explicitly states the following restriction:

Applicants for Grade 9 and below must have non-Japanese nationality on either the student's or parents' side. Families with Japanese nationality only may apply for Grade 10-12 only.

This policy reflects ISSH's historical operation as a school primarily serving expatriate and international families. For Japanese permanent resident families, admission to Grade 9 and below is structurally challenging.

Grade-Level Admission Assessment

Grade Level

Assessment

K3-K4

Individual interview (specific evaluation criteria are not disclosed)

K5

Group or individual screening

Grades 1-4

Online math assessment + English reading and writing assessment

Grades 5-12

Math + English reading comprehension + English essay writing

Applicants who pass proceed to a family interview.

Positioning of NWEA MAP — Benchmark Testing for Current Students

ISSH uses NWEA MAP (Measures of Academic Progress) as benchmark testing for current students in Grades 1-8. However, the school does not explicitly list MAP as an entrance examination on its admissions page.

To be precise: "ISSH is a MAP school, but publicly disclosed admissions are described as math + reading/writing + essay."

Required Documents

Documents required for application include the following:

  • Passport copy
  • Official transcript for current year and past 2 years (English translation)
  • Recommendation letter (from current form tutor or school principal)
  • Standardized test results where applicable (TOEFL Junior, Eiken, etc.)
  • Medical examination report

Family Interview

After passing the written assessment, a family interview takes place. Attendance of both parents and the student is generally required. The interview evaluates the following:

Evaluation Criterion

Specific Content

Academic curiosity

"What have you been passionate about recently?" "What are you reading?"

Motivation for application

"Why Sacred Heart?" "What is your understanding of Sacred Heart Goals?"

Family's educational values

"What values does your family prioritize?"

Alignment with Goals

"Can the family commit to the school's philosophy?"

Fit with school culture

"Can the family adapt to over 100 years of tradition?"

Application Administration

  • Rolling admissions (applications accepted year-round; closes upon enrollment capacity)
  • Decision notification: Usually within weeks of the family interview
  • Enrollment procedures upon acceptance: Payment of registration and education development fees

10. Required English Proficiency and the Reality of ELA (English Language Acquisition)

ISSH's English proficiency standards are considerably stricter than those of Seisen. This reflects the curriculum's emphasis on US high school standards and AP coursework, which demand high English language capability.

What Is ELA (English Language Acquisition)?

ELA is a support program for students whose first language is not English or whose English proficiency does not meet the grade-level standard.

Grade-by-Grade ELA Implementation

Grade

ELA Implementation

Grade 1-8

In-class support + small group lessons

Grade 9-10

Modified ELA or Regular ELA

Grade 11-12

Regular ELA only (maximum 3 years)

Critical Constraints

The critical constraints explicitly stated in ISSH's official policy are as follows:

  1. Students from non-English-speaking schools are automatically subject to ELA assessment
  2. ELA seats in each grade are limited
  3. If ELA seats are full, students enter the waiting pool even if regular class seats are available
  4. Intermediate level of English is required from Grade 10 onwards
  5. ELA placement is determined by WIDA (assessment agency)

These constraints mean that teaching foundational English after admission is practically impossible. Sufficient English proficiency is required at the time of application.

English Proficiency Benchmarks

Based on ELT's ISSH placement data, the following represents the "safe zone":

Grade

CEFR

EIKEN Reference

TOEFL Junior

K3-K5

A1–A2

–

–

Grade 1-4

A2–B1

Grade 5–Grade 3

600+

Grade 5-8

B1–B2

Pre-2nd Grade–2nd Grade

700+

Grade 9-10

B2

2nd Grade–Pre-1st Grade

800+

Grade 11-12

B2–C1

Pre-1st Grade–1st Grade

–

Parental English Requirements

ISSH's official Admissions Policy explicitly specifies "parental English communication ability" as a requirement. All school communications, parent meetings, teacher conferences, and emergency notifications are conducted in English.

In particular, college guidance and university application support for Grade 12 graduation are entirely conducted in English. At least one family member must be able to communicate practically in English.

11. Family Interview Assessment: Alignment with Sacred Heart Goals

In ISSH's family interview, one of the most critically assessed dimensions is "understanding of Sacred Heart Goals and alignment with family values."

Articulating Goals Through Concrete Family Experiences

Successful families discuss Sacred Heart Goals not as abstract principles, but through specific family experiences and episodes.

For example, when discussing Goal 3: A social awareness which impels to action:

  • × Abstract response: "We value social awareness in our family."
  • ◎ Specific response: "Our child volunteered at a local community food bank for six months when she was eight years old. Through this experience, she developed a realistic understanding of poverty issues and is now leading her school's community service club."

Memorized Responses Are Unacceptable

Merely reciting memorized principles is the pattern ISSH dislikes most. The Goals are not a "formality because it is a Catholic school"—they represent the operational standards the school genuinely values. The interview assesses whether families can articulate these goals as their own lived experience.

Superficial Motivations Are Insufficient

The same applies to application motivation. Responses such as "close to home," "we prefer all-girls schools," or "English environment" are perceived as lacking respect for a century-old tradition.

Successful families structure their response as follows:

  • What aspect of Sacred Heart Goals resonates with your family
  • What attracts you about the school's century-long tradition and culture
  • How you understand the global significance of the sister school network
  • Your family's long-term commitment to the Sacred Heart alumni community

Consistency Between Parents and Applicant

The assessment also evaluates whether parents' and the applicant's responses are consistent. Misalignment—such as when parents describe a "family committed to social service" but the child's response does not reflect this—is interpreted as a lack of genuine commitment to the Goals.

In ELT's interview preparation, we conduct sessions where the entire family translates Sacred Heart Goals into the family's own language, ensuring a consistent family narrative.

12. Characteristics of ISSH-Admitted Families: ELT's Analysis

ELT has supported numerous ISSH-admitted families. From this experience, we share five characteristics common to successful applicants.

Characteristic 1: Sacred Heart Goals Are Implemented as Family Culture

Successful families can articulate how the five elements of Sacred Heart Goals (faith, intellect, social awareness, community, and personal growth) are implemented as lived family culture. Rather than reciting "prepared interview answers," they speak from what their family practices daily. Schools select families that embody these values authentically.

Characteristic 2: Serious Focus on US University Admission

ISSH is optimized for US university admission through AP-based curriculum. Families that are genuinely committed to US university admission and understand AP's academic demands align well with ISSH's curriculum. Families prioritizing Japanese top universities or considering UK, Canada, or European pathways may find Seisen a better fit.

Characteristic 3: Embrace the Century-Old Institutional Culture

ISSH, founded in 1908, has organized community structures including the three-tier parent organization (PA-PAC-Homeroom Parent), Family Festival, and Bingo Night. Families that welcome a formal environment and are willing to actively engage with the school community as parents are well-suited.

Characteristic 4: Complete English Communication Between Parent and Child

As stated in ISSH's Admissions Policy, both parents and child must be able to complete school communication in English. Particularly in upper grades, ELA seats are limited, so the child's sufficient English proficiency is essential.

Characteristic 5: Meeting Institutional Admission Requirements

For grades below 9, either the applicant or one parent must hold non-Japanese nationality. Families with only Japanese nationality who understand this institutional requirement and strategically plan their application for Grade 10-12 succeed.

Typical Admission Profiles by Year Level

Here are representative profiles of admitted students ELT has supported:

  • Kindergarten new entry: International families (expatriate or mixed Japanese-foreign households) with children aged 3-5
  • Grade 1-8 transfer: Third-culture kids or transfers from urban international schools. English proficiency at CEFR B1 or above
  • Grade 9-12 transfer: International families or Japanese-national students entering at Grade 10 or above. English proficiency sufficient for AP coursework (CEFR B2-C1)
  • Grade 12 Sixth Form entry: Graduates of international or English-focused schools. Strategic US university application plans leveraging AP credits

13. Families for Whom ISSH Is and Is Not a Fit

To be direct, ISSH is not the right school for every family. With annual tuition around 4 million yen, an advanced AP-based US curriculum, and genuine commitment to Sacred Heart Goals, families must carefully assess the alignment of their values and educational philosophy.

ISSH Is a Good Fit For:

  • Families seriously pursuing Ivy League or top US private university admission — AP-based curriculum and strong US college acceptance track record
  • Families seeking to deepen excellence in individual AP subjects — Individual subject depth rather than IB's required comprehensive package
  • International families or those with overseas experience — Meets Grade 9 and below admission requirements
  • Families attracted to a century-long tradition and institutional culture — Organized parent community, enduring alumni networks
  • Families aligned with Sacred Heart Goals — Embody the five elements (faith, intellect, social awareness, community, personal growth) as family culture
  • Families who value Hiroo's location — International environment, urban access

ISSH Is Not a Good Fit For:

  • Families seeking IB-based inquiry-driven learning — Seisen is a better match
  • Families considering multiple regional university pathways — Seisen's distributed network better accommodates this
  • Japanese-national-only families applying for Grade 9 or below — Institutionally ineligible (Grade 10-12 only)
  • Families unable to sustain tuition exceeding 4 million yen annually
  • Families seeking depth in Catholic education — Seisen offers mandatory Religion classes with more explicit religious education
  • Families unable to speak English and depend on their child to communicate with school — High risk in emergencies

Decision Framework for Families Considering Both ISSH and Seisen

If you are undecided, these five questions will clarify your direction:

  1. Do you seriously pursue US university admission, or do you envision multi-regional university pathways?
  2. Do you seek individual AP subject depth, or do you prefer IB's comprehensive balance?
  3. Are you drawn to institutional tradition and culture, or do you prefer a smaller, more intimate community?
  4. Does your family include non-Japanese national members, or is your family Japanese nationals only?
  5. Do you welcome Sacred Heart Goals' character education approach, or do you prefer mandatory Religion classes with explicit religious education?

If three or more of your answers lean toward ISSH, the school likely fits your family well.

15. ELT's ISSH Preparation: Comprehensive Support to Admission

ELT has supported ISSH admission across all grade levels—from Kindergarten new entry through Grade 1-9 transfer (for international families) to Grade 10-12 Sixth Form entry. We provide comprehensive support grounded in the distinctive admissions characteristics of ISSH as a US international school, alignment with Sacred Heart Goals, and English proficiency strengthening in preparation for AP coursework.

ELT's ISSH Preparation Program Features

  • K5 Screening Preparation: Behavioral observation and group/individual assessment coaching, English self-expression practice
  • Grade 1-4 Test Preparation: Online math and English reading/writing assessment training delivered by CELTA/DELTA-qualified native instructors
  • Grade 5-12 Test Preparation: Math, English reading comprehension, and English essay writing instruction with structured essay methodology
  • Family Interview Preparation: Goal-alignment interview coaching and family interview role-play grounded in Sacred Heart Goals
  • English Proficiency Enhancement: One-to-one instruction targeting CEFR B2-C1 for AP readiness
  • Application Documents Support: English translation of past two years' grades, recommendation letter guidance, essay editing
  • Sixth Form Entry Preparation (Grade 10-12): AP course planning and US university application strategy

Families Who Choose ELT

  • Families uncertain whether ISSH or Seisen is the better fit
  • Families unsure how to articulate Sacred Heart Goals in their own family language
  • Families seeking guidance on English essay writing preparation for Grade 5 and above
  • Families considering Grade 10+ transfer but unsure if current English proficiency is sufficient
  • Families aiming for US Ivy League admission through Year 12 Sixth Form entry
  • Families planning to reapply after a previous admission cycle

Free Consultation

If you wonder "Will our current English proficiency and academic record meet ISSH's admission threshold?" or "We want professional guidance on K5 screening, English essay writing, and family interview preparation" or "How do we determine whether Kindergarten entry, Grade 1-9 transfer, or Sixth Form entry is the right path?", our consultants with extensive admission experience will respond to your questions individually.

Frequently Asked Questions

A

International schools that adopt British, American, or IB curricula do not use the concept of 「偏差値」. Instead, AP (Advanced Placement) scores (out of 5) serve as the academic performance indicator. ISSH's 2025 AP average is 4.27/5, with a 93% rate of achieving a 3 or higher. In terms of Japanese 偏差値, this is often understood as equivalent to the difficulty level of Japan's most selective junior-senior high schools.

A

Annual tuition ranges from ¥3.71–4.03 million per year depending on grade level (2026–2027 academic year, estimated). In the first year, this includes an initial fee of ¥930,000, bringing the total to approximately ¥4.85 million for Grades 1–8 as a baseline. When uniforms, lunch services, AP exam fees, and Field Trips are added, the practical first-year cost is approximately ¥5.00–5.40 million.

A

Yes, ISSH actively welcomes non-Christian families. The current student body represents approximately 20 different religions, denominations, and belief systems, and students from different faiths lead prayers at Junior School assemblies. The school operates under Sacred Heart Goals, Values, and Spirituality without requiring conversion.

A

The official Admissions Policy explicitly states that "parental English communication ability" is a requirement. All school communications are conducted in English, so at least one parent must be able to communicate functionally in English. For Grades 11–12, university guidance is also conducted in English, making an English-speaking environment for the entire family desirable.

A

Grades 1–8 receive in-class support plus small group lessons; Grades 9–10 have access to Modified ELA or Regular ELA; Grades 11–12 have Regular ELA only, with a maximum duration of 3 years. ELA slots are limited at each grade level, and when full, students are placed in a waiting pool even if spaces exist in regular classes. It is practically impossible to "enter and receive basic English instruction from scratch after admission."

A

Both are top-tier girls' international schools but are fundamentally different institutions. Choose Sacred Heart if you seek an AP-based curriculum with US university focus; choose Seisen if you prefer a continuous IB education with geographic diversity. ISSH's institutional requirement that Japanese-national-only families may only apply for Grades 10–12 is also an important decision factor. For detailed comparison, please refer to the "H2-5 Sacred Heart vs. Seisen" section in the main article.

A

2025 AP average: 4.27/5; 3+ achievement rate: 93%; 301 exams administered. The trend over the past 3 years (2023–2025) shows averages of 3.95 → 3.8 → 4.27; 3+ rates of 90.3% → 86% → 93%; and test volume of 238 → 253 → 301 with steady growth. AP subject offerings have also expanded consistently from 22 → 23 → 24, reflecting the school's continued investment in AP.

A

While no fixed score requirement is officially stated, ELT's admission data suggest the following benchmarks:

  • K3–K5: Basic greeting level
  • Grades 1–4: CEFR A2–B1 equivalent (Eiken Grade 5–3, TOEFL Junior 600+)
  • Grades 5–8: CEFR B1–B2 equivalent (Eiken Grade 2–Preparatory Grade 2, TOEFL Junior 700+)
  • Grades 9–10: CEFR B2 equivalent (Eiken Grade 2–Preparatory Grade 1, TOEFL Junior 800+)
  • Grades 11–12: CEFR B2–C1 equivalent (Eiken Preparatory Grade 1–Grade 1)
A

AP allows individual course selection on a subject-by-subject basis, enabling deep specialization in strong subjects and is optimized for US university admission. By contrast, IB Diploma is a package comprising 6 subjects plus TOK, EE, and CAS, offering balanced breadth while being recognized by universities worldwide. If you aim seriously for US universities, choose AP (Sacred Heart); if you are considering universities globally, choose IB (Seisen).

A

ISSH shares a campus with Sacred Heart Women's University and is designated as an eligible school for school-recommended admission (指定校推薦). The specific number of slots varies by faculty and academic year. ISSH graduates have historically benefited from this as a secure pathway to this prestigious Japanese women's university.

A

Brain Bowl (academic knowledge competition), Medical Society (for medically interested students), Math Field Day (mathematics competition), Robotics Program (VEX Robotics), various sports (basketball, volleyball, soccer, etc.), drama, choir, Model United Nations, and many others. The school also features 33 student council leadership positions and 6 Councils (Academic, Fine Arts, Social Service, Sports, Well-being, and World).

A

Extremely strong. The school offers a comprehensive range of AP STEM subjects (Computer Science A, Calculus AB/BC, Biology, Chemistry, Physics 1/2, Statistics, Environmental Science) and maintains active programs in Brain Bowl, Medical Society, Math Field Day, and Robotics. This strength is backed by strong admission records to Ivy League universities and European medical programs such as Semmelweis and Debrecen.

A

Only Grades 10–12 applications are permitted. For Grade 9 and below, either the student or at least one parent must be non-Japanese national as a principle (official Admissions Policy). Japanese-national-only families may apply only for Grades 10–12 (the Sixth Form, the final three years of secondary education). For families considering Grade 1–9 enrollment, Seisen is institutionally a more accessible option.

A

We recommend starting 12 months in advance. For Grade 5–12 applications in particular, English essay writing and alignment with Sacred Heart Goals during the family interview are critical and require adequate preparation time. For Grade 11–12 (Sixth Form) admission, we recommend beginning 18 months or more in advance and securing AP-level English proficiency (CEFR B2–C1).

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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