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KAIS International School — a US-Style Curriculum School, Not a Bilingual One

Tokyo, Japan

Located in Kami-Osaki, Shinagawa-ku, centred on a US-style curriculum including IEYC and AP.

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

KAIS is based in Kami-Osaki, Shinagawa-ku, reportedly centred on a US-style curriculum including IEYC (International Early Years Curriculum) and AP (Advanced Placement). It serves Pre-K through Grade 12.

At a Glance

Curriculum	US-style (IEYC, AP, English-medium) not publicly confirmedas of: 2026-09-24
Grade Range	Pre-K-Grade 12as of: 2026-09-24
Est. First-Year Cost (Pre-K-G2)	≈¥3.24M2026-27 · as of: 2026-09-24

Not "Bilingual" — an English-Medium, US-Style Curriculum

The legacy William Prep directory described this school as having "own bilingual curriculum." What was actually confirmed this session is an English-medium, US-style curriculum centred on IEYC and AP — no mention of a balanced Japanese/English bilingual approach turned up.

William Prep’s Analysis

"Bilingual" means very different things depending on the school — some treat Japanese and English as equally weighted, others run almost entirely in English with Japanese as a secondary subject. KAIS appears closer to the latter based on what was confirmed this session — worth checking directly if a family is choosing specifically for balanced bilingual education.

Fees: A Real First-Year Total of About ¥3.24M (Pre-K-Grade 2)

KAIS's own 2026-27 fee schedule lists two one-time charges: a ¥400,000 enrollment fee and a ¥400,000 building maintenance fee (Pre-K-Grade 2). On top of that, tuition (¥2,244,358, tax included), materials (¥154,642), and trips/events (¥40,000) apply, for a genuine first-year total of roughly ¥3,239,000. Students progressing internally from Grade 8 to the high school division skip the enrollment fee but still pay building maintenance.

University Entrance Eligibility in Japan

School-accreditation route	No not publicly confirmedWhether KAIS holds any of the six MEXT-recognised accreditations was not confirmed this session.
Student-qualification route (IB, etc.)	No not publicly confirmedWhether KAIS offers the IB or another curriculum that would trigger the individual-credential route was not confirmed this session.

Whether KAIS holds a MEXT-recognised accreditation, and whether it offers a curriculum triggering the individual-credential route, were both not confirmed this session. Families with specific Japanese-university plans should confirm the actual eligibility route directly with the school.

Fees & Estimated First-Year Cost

academic year: 2026-27

Enrollment Fee	¥400,000
Building Maintenance (Pre-K-G2)	¥400,000
Tuition (Pre-K-Grade 2)PreK-G2	¥2,244,358
Materials (Pre-K-G2)PreK-G2	¥154,642
Trips & Events (Pre-K-G2)PreK-G2	¥40,000
Tuition (Grade 3-8)G3-G8	¥2,294,358
Tuition (Grade 9-12)G9-G12	¥2,410,659
Estimated First-Year Total	¥3,239,000

Includes: enrolment, facilities, tuition, other, trips — Excludes: Excludes lunch and school bus (only for those using them). All figures include 10% tax. This uses Pre-K-Grade 2 as the base.

What Makes This School Distinctive

A US-style curriculum centred on IEYC and AP

An English-medium educational programme

Multiple third-party sources consistently report this curriculum structure.

A different reality from the legacy directory's "bilingual" label.

Admissions

Cycle

未確認 not publicly confirmed

What Japanese Families Should Know

Who Might Find This School a Good Fit

Might suit — Families seeking an English-medium, US-style education

Might not suit — Families who had assumed a balanced Japanese/English bilingual programme

William Prep’s Analysis

What mattered in researching KAIS was not taking the word "bilingual" at face value without checking what it actually means here. Trusting the legacy directory's single word alone could have led a family to apply with expectations that don't match reality.

Questions to Ask the School

1.How much weight does Japanese-language instruction actually carry in the curriculum?
Why this matters: Not confirmed this session.
2.Does KAIS itself hold a WASC or other MEXT-recognised accreditation?
Why this matters: Not confirmed this session.

Sources & Verification

Tuition & Fees — KAIS International Schoolprimary source · as of: 2026-09-24Fetched directly. 2026-27: enrollment fee ¥400,000, building maintenance ¥400,000 (both one-time; Grade 8→9 internal progression students skip the enrollment fee but still pay building maintenance). Annual tuition (incl. 10% tax) by grade band: Pre-K-G2 ¥2,244,358, G3-8 ¥2,294,358, G9-12 ¥2,410,659, plus separate materials and trips/events fees per band.
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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