Key facts
Age range 5–18
Grades K–12
Gender Boys
Faculty —
Students 800–1,000
Tuition ¥2,700,000 – ¥2,850,000

St. Mary's International School (SMIS)

Est. 1954
Tokyo American Curriculum (Common Core) Catholic (Brothers of Christian Instruction), welcoming boys of all faiths. Religion/Ethics is part of the curriculum.

School at a Glance

Age Range 5–18
Grades Offered K–12
Gender Boys
Total Students 800–1,000
Faculty —
Classes per Grade —

St. Mary’s International School (SMIS), founded in 1954, is a leading private all-boys international school in Tokyo. Located on a modern 9-acre campus in Seta, Setagaya-ku, the school serves approximately 900 to 1,000 students from the Readiness Program (Age 5) through Grade 12.

Affiliated with the Catholic Brothers of Christian Instruction, SMIS welcomes boys of all faiths and backgrounds and fosters character, resilience, and leadership within a diverse international community.

The school follows a rigorous American-based curriculum. Elementary and Middle School programs incorporate Common Core, NGSS, and AERO standards, along with specialized subjects such as Robotics and Design Technology. High School students earn a High School Diploma, and more than 85 percent pursue the International Baccalaureate (IB) Diploma Programme.

All instruction is in English, with Japanese and other world languages offered. Student Support Services and EAL programs support students through Grade 8.

SMIS emphasizes three pillars: Academics, Arts, and Athletics. Facilities include one of the largest outdoor playing fields among international schools in Tokyo, a year-round heated 25-meter swimming pool, multiple science laboratories, and extensive performing arts programs supporting 14 music ensembles including internationally recognized choirs.

St. Mary’s International School is accredited by the Western Association of Schools and Colleges (WASC) and the Council of International Schools (CIS). Overseas applications are accepted year-round on a rolling basis, while local applicants typically follow an October 31 deadline.

Fees & Value

Base Currency ¥ (Japanese Yen)
Annual Tuition ¥2,700,000 – ¥2,850,000

Enrollment Fees

  • Application Fee: ¥50,000
  • Registration Fee: ¥400,000
  • Deposit: ¥1,000,000

Payment Schedule

Typically tuition fee is billed in July/August before the start of the academic year.

Additional Fees

Building Maintenance Fee: ¥100,000 (Annual).

Campus & Facilities

Campus Size 9 acres
Library Science Labs School Bus Playgrounds / Outdoor Areas

Sports Facilities

Swimming, Outdoor Playing Field, Four Tennis Courts, Gymnasium

Arts Facilities

Music Rooms

Technology

Multiple Science Labs, Robotics lab, and Design Technology lab

Learning & Curriculum

Curriculum American Curriculum (Common Core)
Diplomas / Certificates High School Diploma, IB Diploma
Languages English
Student Support University Counseling

Extracurricular Activities

Athletics (including swimming, baseball, basketball, ball hockey, soccer, and tennis, competing in all KPASS league events), Creative and Fine Arts (featuring 14 music groups, internationally renowned choirs, Concert Band, Jazz Ensemble, and dramatics opportunities including a tri-school Spring Musical), and Academic/Technical Enrichment (such as Robotics and Design Technology).

Admissions

Application Process

Application form, non refundable application fee

Entry Requirements

SMIS is strictly an all-boys day school (Readiness Program through Grade 12). They must submit transcripts from the current year and the previous two academic years.

Assessment Tests

School Designed Test

Interview Process

Both In-Person and Online Interview Options are conducted to suit the students requirement.

Deadlines

Applications close on October 31st

Required Documents

Passport, Transcripts, Health records

Contact & Location

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