Saint Mary's International School offers US Curriculum and Advanced Placement (AP).

Annual tuition at Saint Mary's International School ranges from ¥2,860,000 to ¥3,050,000 (JPY), depending on the grade level.

In addition to tuition, Saint Mary's International School charges a registration fee of ¥400,000, deposit of ¥300,000.

Admissions at St. Mary's is selective, seeking boys who will thrive in its English-based college-prep environment. Entry requirements include previous school transcripts, standardised test results, a placement/screening exam, and a family interview. Applicants must be prepared to succeed in a rigorous English-language IB curriculum. The school does not discriminate by nationality or creed. Applications for the Readiness Program and Grade 1 typically open in early September and close by late October, with assessment tests in November, group observations and individual interviews in November–December, and results notified by end of February.

The application deadline for RP / Grade 1 Applications Open is 2025-09-01.

Saint Mary's International School is located in Tokyo, Japan.

Saint Mary's International School accepts students from age 6 to 18.

Saint Mary's International School has approximately 1,000 students from 47+ nationalities.

The student-teacher ratio at Saint Mary's International School is 8.8:1.

Yes, Saint Mary's International School provides EAL (English as an Additional Language) support.

Yes, Saint Mary's International School offers a school bus service with 11 routes. School operates 11 school bus routes covering most areas of Tokyo's 23 wards. Buses pick up and drop off students at designated stops across the metropolitan area.