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 tuition ranges from JPY 2,225,000 at early years to JPY 2,550,000 for the DP, with an annual maintenance levy and supply fee on top. 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 tuition sits 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 2,225,000-2,550,000 - 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 |
|---|---|---|
| Early Years (Ages 3-5) | 3 | 13,925 |
| Primary (Grades 1-5) | 6 | 14,707 |
| Middle Years (Grades 6-10) | 11 | 15,333 |
| Diploma (Grades 11-12) | 16 | 15,959 |
Fees converted from JPY. For the most up to date and accurate figures please double check with the school.
Additional Fees
| Fee | Amount |
|---|---|
| Application Fee | 250 |
| Enrollment Fee | 6,258 |
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.