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School comparison · Tokyo
Side-by-side comparison · Updated 2026-04-26 · Both schools in Tokyo
| Metric | Seisen International School | St. Mary's International School |
|---|---|---|
| Curriculum | IB | IB |
| Qualifications | IB Diploma and PSAT | — |
| Ages served | Ages 3 to 18 | Ages 5 to 18 |
| Language of instruction |
| English |
| English |
| Tuition USD | $14,839-$15,935 | $18,387-$19,355 |
|---|
| True annual cost? | $19,787 | $23,271 |
|---|
| Hidden fee %? | +29% | +23% |
|---|
| First-year cost? | $22,287 | $25,771 |
|---|
| WhereNext Value Score? | 68/100 | 67/100 |
|---|
| Cost percentile (city)? | 57th | 78th |
|---|
| Students | 695 | 864 |
|---|
| Nationalities | 42 | 51 |
|---|
| Avg class size | 20 | 21 |
|---|
| Admissions | Competitive | Moderate |
|---|
Highlighted cells indicate which school holds the more favourable value for arriving expat families on that dimension (e.g. lower tuition, smaller class size, higher Value Score, more open admissions). Some rows are neutral.
Full profile · Seisen International School
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Full profile · St. Mary's International School
View the full St. Mary's International School school profile →
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True annual cost in Tokyo
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