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Shinagawa International School (SIS) — Relocated From Shibuya in 2018

Tokyo, Japan

An authorised IB continuum school (PYP/MYP/DP). The school name reflects its current location, but it was founded in Shibuya-ku, not Shinagawa.

Researched by William Prep from published sources. Not yet verified by the school. — Last reviewed by William Prep: 2026-09-24

SIS reportedly opened in 2007 in Shibuya-ku, relocating to its current Higashi-Shinagawa (Shinagawa-ku) site in 2018 — and the school's name reflects that post-move location. It's an authorised IB continuum school (PYP/MYP/DP).

At a Glance

Founded	2007 (Shibuya-ku) (not independently confirmed)as of: 2026-09-24
Relocated	2018 (Higashi-Shinagawa, Shinagawa-ku) (not independently confirmed)as of: 2026-09-24
Curriculum	Full IB continuum (PYP/MYP/DP) (not independently confirmed)as of: 2026-09-24
Est. First-Year Cost (Preschool-K)	≈¥3.92M2026-27 · as of: 2026-09-24

The Name Reflects Its Current Location, Not Where It Started

The name "Shinagawa International School" might suggest it was founded in Shinagawa-ku, but it reportedly started in Shibuya-ku in 2007 and moved to Shinagawa in 2018. Worth keeping this relocation in mind when tracing alumni networks or older institutional history.

William Prep’s Analysis

A relocation history like this usually isn't a deciding factor in school choice, but understanding accurately why a school carries the name it does is still worth doing when evaluating a school's history and institutional stability. Relocating itself is unremarkable — many schools go through it as part of growing.

Fees: A Real First-Year Total of About ¥3.92M (Preschool-Kindergarten)

SIS's own 2026-27 fee schedule lists two one-time charges: a ¥40,000 application fee and a ¥1,000,000 enrollment fee. On top of that, an annual maintenance fee (¥250,000) and supply fee (¥50,000) apply alongside grade-banded tuition (¥2,575,000 for Preschool-Kindergarten), for a genuine first-year total of roughly ¥3,915,000. EAL fees (if required) and a learning support fee (¥500,000/yr, if required) are separate.

University Entrance Eligibility in Japan

School-accreditation route	No not publicly confirmedWhether SIS holds any of the six MEXT-recognised accreditations was not confirmed this session.
Student-qualification route (IB, etc.)	Yes

Whether SIS itself holds a MEXT-recognised accreditation was not confirmed this session. A student completing the full IB Diploma qualifies via the individual-credential route regardless.

Fees & Estimated First-Year Cost

academic year: 2026-27

Application Fee	¥40,000
Enrollment Fee	¥1,000,000
Maintenance Fee (annual)	¥250,000
Supply Fee (annual)	¥50,000
Tuition (Preschool-Kindergarten)Preschool-K	¥2,575,000
Tuition (Grade 1-5)G1-G5	¥2,675,000
Tuition (Grade 6-10)G6-G10	¥2,775,000
Tuition (Grade 11-12)G11-G12	¥2,900,000
Estimated First-Year Total	¥3,915,000

Includes: application, enrolment, facilities, other, tuition — Excludes: Excludes the EAL fee (¥150,000-¥200,000, only if required) and learning support fee (¥500,000/yr, only if required). This uses Preschool-Kindergarten as the base.

What Makes This School Distinctive

A school that relocated from Shibuya to Shinagawa

Founded 2007 in Shibuya-ku, relocated to Shinagawa-ku in 2018

Multiple third-party sources consistently report the founding location and relocation year.

A good example of why a school's name alone shouldn't be assumed to reflect its full history.

Admissions

Cycle

未確認 not publicly confirmed

What Japanese Families Should Know

Who Might Find This School a Good Fit

Might suit — Families for whom commuting to Higashi-Shinagawa is realistic

Might not suit — Families prioritizing a long, unbroken institutional history at one site (this school has relocated)

William Prep’s Analysis

Researching SIS surfaced a simple but easy-to-miss fact: a school's name doesn't necessarily tell its whole history. A founding location that differs from the current one only shows up once you actually check the institutional timeline.

Questions to Ask the School

1.Does SIS itself hold a WASC or other MEXT-recognised accreditation?
Why this matters: Not confirmed this session.
2.Are alumni from the Shibuya era and the post-relocation Shinagawa era part of a unified alumni network?
Why this matters: Not confirmed this session.

Sources & Verification

Tuition & Fees — Shinagawa International Schoolprimary source · as of: 2026-09-24Fetched directly. 2026-27: application ¥40,000, enrollment ¥1,000,000 — both one-time. Annual maintenance fee ¥250,000, supply fee ¥50,000, tuition by grade band (Preschool-Kindergarten through Grade 11-12, in three termly installments). Optional EAL fee and learning-support fee (¥500,000/yr if required).
Search synthesis on Shinagawa International School history — Multiplethird-party source · as of: 2026-09-24Established 2007 in Shibuya, relocated to Shinagawa in 2018. Authorised IB Continuum school (PYP/MYP/DP). Not independently confirmed against the school's own history page directly this session.
大学入学資格について — 文部科学省 (MEXT)official source · as of: 2026-09-23Sets out the routes to 大学入学資格: MEXT-designated schools; graduates of 12-year programmes at institutions accredited by WASC, CIS, ACSI, NEASC, Cognia or COBIS; holders of the IB Diploma, Abitur, Baccalauréat, GCE A-Level, International A-Level or European Baccalaureate; 高等学校卒業程度認定試験 (age-18 gated); and individual university review at 18+.

Last reviewed by William Prep: 2026-09-24

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