Photograph pending
Yokohama Kokusai High School — a "Dual Language" IB, Not a Full-English One
Kanagawa, Japan
A Kanagawa Prefectural public high school that established an IB course — a Dual Language Diploma Programme — within its International Studies Department in FY2019.
Researched by William Prep from published sources. Not yet verified by the school. — Last reviewed by William Prep: 2026-09-24
Yokohama Kokusai High School is a Kanagawa Prefectural public high school that established an IB course — a Dual Language Diploma Programme (DLDP) — within its International Studies Department in FY2019. Like Tokyo Metropolitan Kokusai High School (already profiled by William Prep), it's one of the few public schools in Japan offering the IB Diploma.
At a Glance
| IB Course Established | FY2019as of: 2026-09-24 |
| DP Model | Dual Language (only English and Maths in English)as of: 2026-09-24 |
| Admission | General ≈20 places, returnee-special ≈5 placesas of: 2026-09-24 |
| Extra Costs | ¥100,000-200,000+/yr in IB-related costs (unconfirmed) not publicly confirmedas of: 2026-09-24 |
What "Dual Language DP" Actually Means
This school's IB course teaches only English and Maths in English — Japanese language, history, sciences, and music are taught in Japanese. Worth understanding that this is a genuinely different model from a full-English DP, not a lighter version of the same thing.
William Prep’s Analysis
This isn't a lesser version of the IB — it's a deliberately different design, letting students earn an internationally recognised credential while keeping most learning grounded in Japanese. For a family without full confidence in English, or wanting to preserve Japanese-language thinking skills, that's arguably the better fit. But a family expecting an English-immersion environment specifically would find the reality doesn't match that expectation.
Fees: Standard Public-School Rate Plus Unconfirmed IB Costs
As a Kanagawa Prefectural school, base tuition follows the standard public-school rate set by the prefecture. On top of that, third-party sources report additional IB-related materials and training costs in the range of ¥100,000-200,000+/yr, but the school's own itemized fee page wasn't accessible directly this session (a 404 on direct fetch).
University Entrance Eligibility in Japan
| School-accreditation route | Yes (estimated) |
| Student-qualification route (IB, etc.) | Yes |
On top of the Article 1 graduation route, a student completing the IB Diploma via the DLDP track also qualifies via the individual-credential route — the same dual-route structure as Tokyo Metropolitan Kokusai High School (already profiled by William Prep).
Fees & Estimated First-Year Cost
academic year: 2026
| IB-related costs (materials, training, estimated) | not publicly confirmed |
What Makes This School Distinctive
One of the few public schools in Japan offering the IB Diploma
Runs a Dual Language Diploma Programme model
The school's own IB course page states the language used for each subject.
A rare option to attempt the IB Diploma at public-school fee levels.
Admissions
| Cycle | 一般入試（約20名）・特別入試（帰国生対象、約5名） |
What Japanese Families Should Know
Who Might Find This School a Good Fit
Might suit — Families wanting to pursue the IB Diploma while keeping Japanese as the primary language of thinking
Might not suit — Families expecting a full-English-immersion environment
William Prep’s Analysis
What made researching Yokohama Kokusai valuable is confirming, alongside Tokyo Metropolitan Kokusai, that the "public school + IB" category can vary in how much English intensity it actually builds in. Even schools using the same "Dual Language" label may run it differently in practice — a comparison worth pursuing in a future research pass.
Questions to Ask the School
1.What are the exact IB-related fee amounts?
Why this matters: The school's own itemized fee page wasn't accessible this session.
2.How does this DP course differ from Tokyo Metropolitan Kokusai's (e.g., in English intensity)?
Why this matters: This comparison was not confirmed this session.
Sources & Verification
- 国際バカロレアコース — 神奈川県立横浜国際高等学校official source · as of: 2026-09-24Fetched directly. IB course established FY2019 (平成31年度). Runs a Dual Language Diploma Programme (DLDP) — English and Maths taught in English, other subjects (Japanese A, History, Sciences, Music) taught in Japanese. General admission ≈20 places; special (overseas returnee) admission ≈5 places.
- Search synthesis on 横浜国際高校 fees — Multiple (TCK Workshop, studychain.jp)third-party source · as of: 2026-09-24As a Kanagawa prefectural public high school, base tuition follows the prefectural standard rate (not itemized here separately — see kanagawa-pref-hs-tuition). Reports private-expense (私費徴収金) charges around ¥33,000-38,000 in year 3, plus additional IB-related materials/training costs reported in the ¥100,000-200,000+/yr range — not confirmed against the school's own 私費徴収金額一覧 page directly this session (404 on direct fetch).
- 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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