St. Mary's International School is a IB Diploma Programme / IB school in Tokyo, Japan. Founded in 1954. Annual tuition ranges from $21,172 to $31,624 USD.
Location & Getting There
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Key Details
Scholarships Available
No publicly posted scholarship program. The school operates as a not-for-profit institution with a Corporate Contribution Program and fundraising activities, but no formal need-based or merit-based scholarships are listed.
Key facts
About
St. Mary's International School is a private day school located in Tokyo, Japan, serving male students. Authorized by the International Baccalaureate Organization since 1979, the school offers the IB Diploma Programme with English as the language of instruction, featuring a comprehensive curriculum across mathematics, sciences, languages, and humanities subjects.
School data verified by NanaSays. Last updated: April 2026.
Why Families Choose
All-boys international school in Tokyo educating approximately 1,000 boys from around 60 different countries. Offers the IB Diploma Programme. Catholic ethos with inclusive religious instruction options. Strong emphasis on social-emotional wellbeing with dedicated counselors, campus minister, and school nurse.
Fees & Financials
| Grade / Year | Annual Fee |
|---|---|
| High School | JPY 2,850,000~$ 18,937 |
| Middle School | JPY 2,800,000~$ 18,605 |
| Elementary School | JPY 2,700,000~$ 17,940 |
Conversions to USD use exchange rates as of April 2026.
Original currency: ¥3,160,000 - 4,720,000. Application fee: $335.
Admissions Process
- 1Online inquiry system available for prospective families. The school has specific admissions processes for Reception/Grade 1 entry. An application fee of ¥50,000 (non-refundable) is required and must be paid before the application is processed. Screening results are used to determine admission priority.
Admissions Details
When a grade level is full, students may be waitlisted. Waitlisted students are expected to continue their education elsewhere while waiting. They are considered for enrollment when a seat opens at their specific grade level. Waitlist status is valid only until a designated date set by Admissions. Admission from waitlist is based on individual screening results, not first-come-first-served.
School Day
School day starts around 8:15–8:25 a.m. and ends around 3:10 p.m. The day includes core subjects and daily specials (art, computer, library, music, PE, swimming) with two recess breaks; religious instruction is provided with options for Catholic, other Christian, or World Faiths.
Student Life
In St. Mary's Kindergarten, a Grizzly House System is in place. Houses are represented by trees — Pine, Birch, Cedar, and Oak — and students participate in monthly house challenges; points are awarded to encourage teamwork, school spirit, and positive behavior.
Uniforms are required from Top of the Class supplier. Middle School uniform includes a long-sleeved white shirt with the school logo and a navy tie; additional items include black socks, a black belt, and black shoes (all black, no secondary colors or logos).
Students go to the cafeteria according to their grade level schedule. A light snack should be brought for milk time at 10:30 a.m. A cashless cafeteria service is available as a separate registration.
Facilities & Programmes
Wellbeing & Safety
Three full-time counselors, a campus minister, and a full-time nurse support students' social, emotional and physical well-being. Counselors participate in admissions, orientations, parent presentations, discussion groups and individual counseling. The campus minister provides spiritual guidance to all denominations. The nurse coordinates health care, wellness information, CPR/First Aid training, and maintains a directory of English-speaking medical professionals in Tokyo including psychological and psychiatric care.
St. Mary's endorses the UN Convention on the Rights of the Child and complies with Japanese Child Protection Laws. A Safeguarding and Child Protection Team oversees all safeguarding and reporting. Staff use CPOMS to document disclosures; reporting channels include in-person reporting, an anonymous QR code, and an online form. Students K–12 receive age-appropriate PSHE on health and safety; Elementary students receive SEL including Child Protection and Bullying Prevention. Safeguarding Coordinator is Ms. Hiromi Sawamura.
Student Demographics
School Background
private
Catholic