St. Mary's International SchoolTuition, Admissions & Curriculum
William Michihiko Akiyama
William Prep
Tokyo, Japan
A Catholic-founded, boys-only school across every grade — reportedly open to boys of any faith, not Catholics exclusively.
Last reviewed by William Prep: 2026-09-24
St. Mary's was founded in 1954 by the Brothers of Christian Instruction as a boys' school, moving to its current Setagaya-ku campus in 1971. Every grade is boys-only, and the school reportedly offers the IB Diploma at the high-school level.
At a Glance
| Coeducation | Boys-only, all grades (not independently confirmed)as of: 2026-09-24 |
| Faith Policy | Catholic-founded, open to all faiths (not independently confirmed)as of: 2026-09-24 |
| Curriculum | IB Diploma (high school) (not independently confirmed)as of: 2026-09-24 |
| Est. First-Year Cost (Elementary) | ≈¥4. 51M2026-27 · as of: 2026-09-24 |
01Tuition & Fees
Fees: A Real First-Year Total of About ¥4. 51M (Elementary)
St. Mary's own 2026-27 fee schedule lists three non-refundable one-time charges for new students: a ¥50,000 application fee, a ¥400,000 registration fee, and a ¥1,000,000 development fund. On top of that, an annual ¥200,000 building maintenance fee applies alongside grade-banded tuition (¥2,860,000 for Elementary). Added together, a genuine first-year total comes to roughly ¥4,510,000.
academic year: 2026-27
| Application Fee | ¥50,000 |
| Registration (new students) | ¥400,000 |
| Development Fund (new students) | ¥1,000,000 |
| Building Maintenance Fee | ¥200,000 |
| Tuition (Elementary)Elementary | ¥2,860,000 |
| Tuition (Middle School)Middle | ¥2,970,000 |
| Tuition (High School)High | ¥3,050,000 |
| Estimated First-Year Total | ¥4,510,000 |
Includes: application, registration, capital, facilities, tuition — Excludes: Excludes IB exam fees (¥20,000/subject), the Grade 12 graduation fee, and iPad/MacBook costs. This uses Elementary tuition as the base.
02Admissions
| Cycle | 未確認 not publicly confirmed |
University Entrance Eligibility in Japan
| School-accreditation route | Yes (not independently confirmed) |
| Student-qualification route (IB, etc.) | Yes |
The WASC/CIS accreditation is based on third-party reporting, not confirmed against either registry directly in currently available public information. Independent of that, a student completing the full IB Diploma qualifies via the individual-credential route regardless.
What Japanese Families Should Know
Questions to Ask the School
1.How much religious instruction or worship is actually part of the day-to-day curriculum?
Why this matters: Public information does not establish this clearly; confirm it directly with the school.
2.What is the current status of the WASC and CIS accreditations?
Why this matters: Public information does not establish this clearly; confirm it directly with the school.
03Curriculum
04School Features
Catholic-Founded, but Reportedly Open to All Faiths
The school's founding mission is Catholic education, but it reportedly now welcomes boys of any faith, not Catholics exclusively. The assumption that "Catholic-founded" means "Catholics only" doesn't hold here.
Key Point
How much daily worship or religious instruction is actually built into the curriculum matters differently to different families, so a family considering St. Mary's regardless of faith background should ask the school directly what religious education actually looks like day to day, rather than assume from the "Catholic-founded" label alone.
What Makes This School Distinctive
An interfaith-open policy inside a Catholic-founded boys' school
Catholic-founded, but reportedly open to boys of any faith
Multiple search-aggregated sources report the all-faiths policy consistently.
Families who ruled out Catholic-founded schools on religious grounds may want to reconsider, given this reported policy.
Who Might Find This School a Good Fit
Might suit — Families specifically seeking a boys-only environment
Might not suit — Families wanting coeducation, or with a daughter to enroll
Explore Other Schools
- American School in Japan (ASIJ)Chōfu
- Tokyo Metropolitan Kokusai High School (Kokusai-kō)Meguro-ku
- Tokyo International School (TIS)Minato-ku (Mita)
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