Shinagawa International SchoolVerified
Key Stats
Annual Fees: US$15K - US$17K
Curriculum: IB
Age Range: 3-18
Students: ~250
Location: Shinagawa, Tokyo
Updated April 2026
In Brief
SIS is a genuinely promising option for families in south Tokyo who want a full IB Continuum school without the price tag of BST or KIST. The DP was authorised in 2024 and the first graduating class sits in June 2026 - the school has no published Diploma results yet, so families placing children in the DP should weigh that carefully.
SIS completed its full IB Continuum in 2024 with DP authorisation - PYP was authorised in 2015, MYP in 2023, and Diploma in 2024 - making it Tokyo's newest through-school IB option. The school runs across three small campuses in Shinagawa Ward: secondary at Samezu, primary at Shinagawa Seaside, and the early learning centre near Aomono-yokocho. Around 250 students from 40+ nationalities; class sizes of 16-21 with a 1:6 teacher-to-student ratio that is exceptional by any standard. Japanese nationality capped at 25%.
The fee structure makes SIS one of the more accessible full-continuum IB schools in Tokyo. Annual total runs from JPY 2,450,000 at early years to JPY 2,775,000 for the Diploma years, inclusive of the ¥225,000 annual maintenance fee. The one-time enrolment fee of JPY 1,000,000 is the largest single upfront cost - comparable to Sacred Heart and St. Mary's - but annual fees sit comfortably below KIST and TIS. For families in Shinagawa, Osaki, or neighbouring areas, the location is a practical advantage over schools based further north or west.
The key question for any family considering the Diploma years: SIS's first DP class graduates in June 2026, which means there are no published IB results yet. The school has built credibility through strong PYP delivery over a decade, and the MYP is now into its third year. But if your child is entering Grade 9 or above in the near future, you are enrolling in a DP with no track record. That can be a reasonable bet - early IB authorisation cohorts often perform well - but it is a different risk profile from schools with established result histories. Ask the school specifically how it is preparing the first cohort and what university guidance looks like.
What parents value
- –Full IB Continuum (PYP 2015, MYP 2023, DP 2024) - Tokyo's newest complete IB through-school. Exceptional teacher-to-student ratio of 1:6; class sizes 16-21.
- –Annual fees JPY 2,450,000-2,775,000 - materially lower than KIST or TIS for a full continuum IB school. Well located for Shinagawa, Osaki, and south Tokyo families.
Points of consideration
- –No published IB Diploma results yet - first graduating class sits June 2026. Families placing children in the DP are entering a programme without a track record. Ask directly how the school is preparing this cohort.
- –Three-campus split across Shinagawa Ward; secondary, primary, and ELC are all separate sites. Confirm which campus is relevant for your child's year group and what the journey looks like from your address.
Annual Fees
| Year Group | Age | USDTotal Annual Fee |
|---|---|---|
| Preschool - Kindergarten | 3 | 2,450,000 |
| Grades 1 - 5 | 6 | 2,575,000 |
| Secondary (Grades 6 - 10) | 11 | 2,675,000 |
| Diploma (Grades 11 - 12) | 16 | 2,775,000 |
Fees converted from USD. For the most up to date and accurate figures please double check with the school.
Additional Fees
| Fee | Amount |
|---|---|
| Application Fee | 30,000 |
| Enrollment Fee | 1,000,000 |
Academic Results
Academic results have not been made publicly available by this school.
Extra Curriculars
Contact the school for details on co-curricular activities and facilities. Ask what a normal week looks like outside lessons for your child's interests.
Inspections & Accreditations
Inspection
No published inspection details are currently available.
Accreditations
Accreditation details are not publicly listed.
Memberships
Membership details are not publicly listed.
Student Body
Tokyo's international schools serve a highly diverse student body. Contact the school for current enrolment details.
Leadership
School leadership
Contact the school for details.