Complete Guide to St. Mary’s International School (Boys’ School)

St. Mary’s International School, commonly known as St. Mary’s, is one of Tokyo’s most established international schools, renowned for its academic excellence, strong extracurricular programs, and its unique position as an all-boys institution. Founded in 1954 by the Catholic order of the Brothers of Christian Instruction, the school continues to uphold its mission of providing a well-rounded education rooted in values, leadership, and global citizenship. This guide explores everything prospective families and students should know about St. Mary’s International School.

Overview and Philosophy

St. Mary’s International School is located in Setagaya, Tokyo, and offers education from kindergarten through Grade 12. Its educational philosophy is centered around nurturing the whole child — academically, physically, socially, and spiritually. The school emphasizes discipline, leadership, teamwork, and respect, values which are interwoven into the curriculum and daily life.

Being an all-boys school, St. Mary’s creates an environment tailored to the learning and developmental needs of male students. It also positions itself as a community that builds resilience, camaraderie, and a sense of responsibility among its students. While rooted in Catholic tradition, the school welcomes students of all faiths and cultural backgrounds.

Academic Programs

Curriculum

St. Mary’s offers an American-style curriculum that is designed to prepare students for higher education worldwide. Students progress from a strong foundation in core subjects in the elementary school through to specialized coursework in middle and high school.

Key features include:

• Elementary School (K–Grade 5): A focus on literacy, numeracy, inquiry-based science, and foundational social studies, integrated with art, music, and physical education.

• Middle School (Grades 6–8): Introduction to subject-based learning, with more independence and exposure to foreign languages, technology, and leadership training.

• High School (Grades 9–12): A rigorous program with advanced coursework, electives, and options for International Baccalaureate (IB) Diploma Program and Advanced Placement (AP) courses.

International Baccalaureate (IB) and AP

St. Mary’s is an authorized IB World School, offering the IB Diploma Program in the final two years of high school. This globally recognized qualification provides students with opportunities to enter top universities worldwide. In addition, AP courses are available, giving students flexibility in pursuing areas of strength and interest.

College Counseling

The school has a well-developed college counseling program. Counselors work closely with students and families from Grade 10 onwards to prepare them for university applications. Alumni attend prestigious institutions in the U.S., U.K., Japan, Canada, and beyond.

Extracurricular Activities

Athletics

St. Mary’s is particularly well known for its athletics program. The school has a proud tradition in sports such as rugby, basketball, swimming, wrestling, baseball, tennis, and track and field. As a founding member of the Kanto Plain Association of Secondary Schools (KPASS), it competes against other top international schools in Tokyo.

Sports are not only about competition but also about discipline and teamwork. The school’s athletics program has produced numerous accomplished athletes, and its rugby and wrestling teams are particularly respected.

Arts and Music

Beyond athletics, the arts are also central to St. Mary’s education. The school boasts a strong music program, including orchestra, choir, and band. Students are encouraged to pursue creative expression in visual arts, theater, and media.

Leadership and Clubs

A wide range of clubs, from debate and Model United Nations to robotics and service organizations, provide opportunities for students to develop leadership skills and explore personal interests.

Facilities

The Setagaya campus is expansive and purpose-built to support both academic and extracurricular excellence. Facilities include:

• Modern classrooms and science laboratories

• A large library with multilingual resources

• A state-of-the-art performing arts center

• Multiple sports fields, gymnasiums, a swimming pool, and wrestling facilities

• Chapel and spaces for reflection

• Dedicated spaces for technology and design

The campus reflects the school’s commitment to providing an environment conducive to both learning and personal growth.

Student Life

Life at St. Mary’s is dynamic, structured, and community-oriented. Students experience a strong sense of brotherhood, with older students often mentoring younger peers. School traditions, spirit days, and events such as cultural festivals and international days foster community bonding.

The all-boys environment promotes confidence and encourages students to take risks academically and socially. Many students form lifelong friendships during their time at the school.

Admissions

Application Process

Admission to St. Mary’s is competitive and involves several steps:

1. Application Form & Documentation – Including previous school records and teacher recommendations.

2. Testing & Interview – Students are assessed on academic ability and interviewed for fit within the school’s community.

3. Decision – Families are notified after review by the admissions committee.

Applications are accepted on a rolling basis, but early application is recommended due to limited spots.

Requirements

• Proficiency in English (support is available for students requiring additional language help).

• A record of good academic performance.

• Commitment to the school’s values and willingness to participate fully in its programs.

Tuition and Fees

St. Mary’s tuition is comparable to other leading international schools in Tokyo, reflecting its strong reputation and facilities. For the 2024–2025 academic year, fees include:

• Tuition: Approximately ¥2,400,000–¥2,700,000 annually depending on grade level

• Building Fee & Capital Levy: Required for facility maintenance and development

• Application and Enrollment Fees: Non-refundable

While tuition is significant, many families see the investment as worthwhile for the quality of education, facilities, and opportunities for higher education placements.

Community and Diversity

Although founded by Catholic brothers, St. Mary’s student body is highly diverse, representing over 50 nationalities. The school celebrates multiculturalism while maintaining its traditions of moral education and service. Parents are actively engaged through associations and events, creating a supportive community network.

The school also encourages service learning, with students participating in charitable projects, local volunteering, and international outreach. This instills social responsibility and a sense of global citizenship.

Alumni Network

St. Mary’s has a strong alumni network with graduates excelling in fields such as business, politics, arts, athletics, and academia. Alumni connections provide current students with mentorship opportunities and broaden their professional and cultural horizons.

Why Choose St. Mary’s?

Families select St. Mary’s for a variety of reasons:

• Academic rigor with pathways to global universities

• Unique all-boys environment that supports male development

• Strong athletics and arts programs

• A nurturing community that emphasizes values and leadership

• Rich traditions combined with modern educational approaches

For families seeking a balance of discipline, excellence, and opportunity in Tokyo, St. Mary’s International School remains one of the most respected choices.

Conclusion

St. Mary’s International School stands out in Tokyo’s international education landscape for its unique combination of tradition, academic excellence, and all-boys community. With a focus on holistic development, global citizenship, and leadership, it prepares young men not just for university but for meaningful contributions to society.

Whether a student is drawn by its academics, athletics, or arts, St. Mary’s provides the foundation for success and lifelong brotherhood. For families considering international schooling in Japan, St. Mary’s represents both heritage and forward-looking excellence.

FAQs

What is St. Mary’s International School and what makes it unique?

St. Mary’s International School is a long-established, all-boys international school in Tokyo offering a college-preparatory education from early years through Grade 12. The school blends rigorous academics with character formation, athletics, arts, and service. Its single-gender environment emphasizes brotherhood, leadership, and confidence-building, while welcoming families of all nationalities and faiths.

Which grade levels does the school serve?

The school typically offers sections for elementary (early childhood through Grade 5), middle school (Grades 6–8), and high school (Grades 9–12). The continuum allows students to grow within one community, benefiting from consistent expectations, vertical curriculum alignment, and long-term mentorship.

Is the school Catholic? Do non-Catholic students feel comfortable?

St. Mary’s was founded in the Catholic tradition and maintains values-based education, with opportunities for reflection, service, and moral development. Families from all religious and cultural backgrounds are welcome, and participation in faith life focuses on universal values—respect, compassion, integrity—rather than proselytizing.

What curriculum does St. Mary’s offer?

The academic program follows an international, college-preparatory pathway with a strong foundation in English language arts, mathematics, science, social studies, world languages, and the arts. Critical thinking, research, writing, and presentation skills are systematically developed. Technology, design, physical education, and health are integral parts of the curriculum across divisions.

Does the school offer the IB Diploma Program or Advanced Placement (AP) courses?

The high school program is designed to prepare students for competitive university admissions worldwide. Depending on the year and student interest, students may pursue advanced pathways such as the International Baccalaureate (IB) Diploma Program and/or Advanced Placement (AP) courses. These options provide academic challenge, external benchmarking, and potential university credit. Families should verify current offerings and course availability by year.

How does college counseling work?

Dedicated college counselors guide students through four-year planning, course selection, standardized testing strategy, personal statement development, application timelines, and recommendation processes. The counseling office supports applications to universities in the U.S., U.K., Canada, Japan, Europe, and beyond, coordinating document submission and providing data-informed advice on fit and outcomes.

What is the teaching approach in the elementary and middle years?

In elementary school, instruction emphasizes literacy and numeracy fluency, inquiry-based science, and social studies connected to real-world contexts. In middle school, students transition to subject specialists and develop independence, executive functioning, and foundational research skills. Advisory and homeroom structures build organizational habits and social-emotional competencies.

How are the arts and athletics integrated?

The arts program includes visual arts, band, orchestra, and choir, with opportunities for ensembles, performances, exhibitions, and theater productions. Athletics are a signature strength, with interscholastic teams (e.g., rugby, wrestling, basketball, swimming, track and field, baseball, tennis) that stress discipline, teamwork, and sportsmanship. Both arts and athletics have inclusive entry points and high-performance pathways.

What clubs and leadership opportunities are available?

Students can join academic teams (e.g., debate, robotics, Model United Nations), cultural and language clubs, service organizations, entrepreneurship groups, and student government. Leadership is cultivated through captains’ roles, prefect systems, peer mentoring, and event committees. Many clubs are student-initiated and faculty-advised, encouraging ownership and initiative.

What are class sizes like?

Class sizes are designed to promote participation, individual feedback, and relationships with teachers. Although specific numbers may vary by grade and subject, the school aims to maintain an environment where teachers know students well and can differentiate instruction.

Is there support for English language learners?

Yes. The school typically provides English language support for students who need it, particularly in earlier grades and transition years. Support may include targeted small-group instruction, in-class co-teaching, language labs, and scaffolded assessments. Placement and exit decisions are based on multiple measures of proficiency and progress.

Does the school offer learning support or counseling services?

Student support services generally include learning support, counseling, and wellness programming. The learning support team collaborates with teachers and families to design accommodations and strategies. Counselors address social-emotional development, transitions, study skills, and community resources, fostering a safe and balanced school experience.

What is student life like in an all-boys environment?

Students often describe a strong sense of camaraderie, healthy competition, and willingness to take intellectual and creative risks without stereotype threat. Role models and mentorship across grade levels help younger students develop confidence, while older students practice responsibility and leadership in a supportive culture.

What facilities are on campus?

Facilities typically include modern classrooms, science labs, libraries, arts and music suites, design/technology spaces, athletic fields and courts, gymnasiums, a swimming pool, and a performance venue. Spaces for reflection and community events support the school’s whole-person mission.

Is St. Mary’s a day school? Is there a bus service?

St. Mary’s is primarily a day school. Many international families live within commuting distance of the campus. Depending on grade and residential location, families may use school-arranged buses, public transit, or private transport. Details on routes and fees should be confirmed with the transportation office.

How does the admissions process work?

Admissions typically involve an online application, school reports, teacher recommendations, a student assessment or placement test, and an interview. Rolling admissions may be available, but seats in popular grades fill quickly, so early application is advised. The school seeks mission-aligned families and students who will engage fully in academics, arts, service, and athletics.

Is English proficiency required for admission?

Because instruction is in English, applicants should demonstrate age-appropriate proficiency. The school evaluates language readiness through previous reports and assessments. Where needed—and depending on space—English language support may be provided after enrollment to help students access the curriculum.

Can students transfer mid-year?

Yes, international schools often accommodate mid-year transfers, especially for relocating families. Space availability and course alignment determine feasibility. For high school transfers, credit evaluation and graduation requirements are key; early communication with counseling and admissions helps smooth the process.

How much are tuition and fees?

Tuition is comparable to leading international schools in Tokyo and varies by division. Families should budget for application and enrollment fees, learning materials, transportation (if used), and activity or capital fees where applicable. For the most accurate and current figures, consult the school’s published fee schedule.

Are scholarships or financial aid available?

Some international schools offer limited financial assistance or need-based support. Availability, eligibility criteria, and deadlines vary by year. Families interested in aid should inquire early, as funds—if offered—are typically limited and require additional documentation.

What is the school calendar and daily schedule?

The academic year generally runs from late summer to early summer with breaks in autumn, winter, and spring. The daily schedule includes core academics, arts/PE, advisory, and co-curricular time. High school schedules may feature rotating blocks to support lab courses, extended rehearsals, and athletics. Exact dates and bell schedules are published annually.

Does the school have uniforms?

Many international schools in Japan maintain a uniform or dress code to promote professionalism, equity, and school identity. Families should review the specific uniform list (including PE kit and seasonal items) and vendor details after admission.

How does the school handle technology and devices?

The school integrates technology to enhance learning—research, collaboration, design, and media literacy—while balancing screen time. A bring-your-own-device (BYOD) program or school-issued devices may be in place by division. Digital citizenship, academic honesty, and data security are emphasized through explicit instruction and policy.

What languages are offered besides English?

World language options typically include Japanese and additional languages depending on staffing and demand. Students progress from novice to advanced levels, with culture, communication, and literacy integrated into the curriculum. Native or heritage language pathways may be available.

How are health, safety, and safeguarding addressed?

Student safety is a priority. Protocols usually include child protection training for staff, emergency drills, campus security measures, nurse or health office services, and policies for concussion management, allergies, and medication. Anti-bullying programs, advisory, and counseling support a respectful, inclusive climate.

What is the homework and assessment philosophy?

Homework is purposeful—reinforcing skills, preparing for discussions, or advancing projects—without overwhelming students. Assessment balances formative feedback with summative evaluations such as essays, lab reports, performances, and exams. Rubrics and clear criteria help students understand expectations and track growth.

How can parents get involved?

Parent engagement typically includes a parents’ association, volunteer opportunities, arts and athletics booster groups, cultural events, and workshops. Regular communication—newsletters, portals, conferences—keeps families informed about progress, calendars, and opportunities to connect with the community.

What university outcomes do graduates achieve?

Graduates attend a wide range of selective institutions across the U.S., U.K., Canada, Japan, and other regions. Beyond acceptances, the school emphasizes “fit”—aligning academic goals, interests, finances, and campus culture. Alumni networks often support internships, mentorship, and career exploration.

How can families visit or learn more?

Prospective families can attend open houses, campus tours, information sessions, and student-shadow days when offered. The admissions office provides guidance on application timelines, assessments, and documentation. Reviewing the current course catalog, activities list, and fee schedule is recommended before applying.

What kind of student thrives at St. Mary’s?

Students who embrace challenge, seek brotherhood and leadership, and want to engage fully—in classrooms, studios, stages, laboratories, fields, and service—tend to thrive. St. Mary’s supports boys to become well-rounded young men who are academically capable, principled, and ready to contribute positively to their communities.

Tokyo International School Guide