Seisen International School (SIS) — IB Primary Education in Tokyo
Shinagawa-ku, Tokyo, Japan
Seisen International School (SIS) is an international school in Shinagawa-ku, Tokyo. This profile reviews its primary curriculum, fees, campus information, and admissions questions using official sources where available.
Last reviewed: 2026-10-21
Seisen International School (SIS) is located in Shinagawa-ku, Tokyo and serves K–G12 (all-girls G1–12) through IB PYP / MYP / DP (Montessori in K). It was founded in 1962. William Prep has verified Main campus for primary-age provision.
At a Glance
- Year Founded
- 1962
- Curriculum
- IB PYP / MYP / DP (Montessori in K)
- Enrollment
- 700
- Tuition & Major Fees
- 2026-27: Tuition (Grade 1–5) ¥2,650,000; Application Fee ¥30,000; Registration Fee ¥300,000; Land and Building Development Fee ¥700,000; Building Maintenance Fee ¥150,000
Key Features and Institutional Notes
- The published grade range is K–G12 (all-girls G1–12); the stated curriculum is IB PYP / MYP / DP (Montessori in K).
- Listed as an international school; the primary directory contains Main campus.
- Programme authorisations recorded in William Prep's source file: IB-PYP, IB-MYP, IB-DP. Reconfirm current status before applying.
- Institutional accreditations recorded in William Prep's source file: CIS, NEASC. Reconfirm current status before applying.
- School bus: available. Boarding: not available.
Who Might Find This School a Good Fit
Might suit
- Families seeking a primary programme built around IB PYP / MYP / DP (Montessori in K).
- Families for whom regular travel to Shinagawa-ku, Tokyo is practical.
Might not suit
- Families requiring Article 1 status; compulsory-education treatment should be checked with the relevant municipality.
- Families requiring all parent-school communication in Japanese; the recorded parent-language note is: Not required (EN-medium).
- Families for whom the published fee figure (¥2,800,000–3,100,000) plus transport, meals, uniforms, and other extras would exceed budget.
This fit assessment is based on published curriculum, location, legal status, fees, and language requirements. It is not a ranking of educational quality.
Sources
- Tuition & Fees ↗Seisen International School · School official
- Main campus location information ↗Seisen International School (SIS) · School official
- School website ↗Seisen International School (SIS) · School official
Fees, admissions rules, and accreditation statuses change. Check the latest school-issued documents before making an application decision.
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