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Chiyoda Junior and Senior High School — Both "International" and "Musashino University" Dropped From the Name

Tokyo, Japan

Founded in 1888, this school went from a women's academy to coeducational with IB accreditation in 2018, then underwent its third renaming in 2025.

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

This school was founded in 1888 as a women's academy. It became coeducational in 2018, renaming to Musashino University Affiliated Chiyoda High School and gaining IB accreditation the same year. It was renamed again in 2024 to 千代田国際中学校・武蔵野大学附属千代田高等学院. Then, in April 2025, both "International" and "Musashino University Affiliated" were dropped, leaving the simple name Chiyoda Junior and Senior High School. The legacy William Prep directory used the 2018-era name.

At a Glance

Founded	1888 (as a women's academy) (not independently confirmed)as of: 2026-09-24
Name History	2018 coed→2024 renamed→April 2025 dropped both "International" and "Affiliated" (not independently confirmed)as of: 2026-09-24
IB Reference	Not found on the school's current site (third parties report it continues) not publicly confirmedas of: 2026-09-24
Fees	Not confirmed this session (current fee page not located) not publicly confirmedas of: 2026-09-24

No IB Mention on the School's Current Site

Third-party sources report the Dual Language DP programme continues even after the 2025 rebrand. But checking the school's own current site (chiyoda.ed.jp) directly, while it describes inquiry-based, project-based learning, no mention of the IB turned up anywhere. That doesn't necessarily mean the IB was dropped — but at minimum, the school isn't currently foregrounding it.

William Prep’s Analysis

How to handle this discrepancy was a real test of this research's discipline. It would have been easy to simply assert "the IB continues" based on third-party reporting — but since the school's own primary source doesn't back that up, this profile records honestly that it couldn't be confirmed. The decision to drop "International" from the name at all may itself signal a broader shift in how the school now positions itself.

Fees: The Rebrand Is Too Recent for a Current Primary Source

With the April 2025 rebrand still very recent, no dedicated fee page was found on the school's own site this session. Fee information from the old name persists on several third-party sites, but publishing it as if it were still current risked being wrong — the rebrand may have changed the fee structure itself, not just the name.

University Entrance Eligibility in Japan

School-accreditation route	Yes (estimated)
Student-qualification route (IB, etc.)	No not publicly confirmedIf a student completes the IB Diploma, the individual-credential route would apply — but whether the IB programme itself currently still exists wasn't confirmed this session.

Domestic university eligibility via Article 1 graduation is assured. On the IB Diploma question specifically, third-party sources report it continues, but the school's own current site makes no mention of it — a discrepancy this session couldn't resolve. Families planning around the IB should confirm directly with the school before assuming either way.

What Makes This School Distinctive

A 137-year-old school that has been renamed three times

Founded 1888, coed and IB-accredited since 2018, renamed twice more in 2024 and 2025

Multiple third-party sources consistently report this history.

Families searching under the old name might not find the school under its current one.

Admissions

Cycle

未確認 not publicly confirmed

What Japanese Families Should Know

Who Might Find This School a Good Fit

Might suit — Families willing to contact the school directly to confirm the current IB status before applying

Might not suit — Families assuming the IB Diploma is definitely still offered

William Prep’s Analysis

Researching this school, alongside Mita's renaming, stands as one of the clearest demonstrations of William Prep's research policy actually doing its job. Where third-party reporting and the school's own current site disagree, the principle here — trust the primary source, but record the disagreement honestly rather than papering over it — held up exactly as intended.

Questions to Ask the School

1.Is the IB Diploma Programme still offered?
Why this matters: Third-party sources report it continues, but the school's current site makes no mention of it — an unresolved discrepancy this session.
2.What are the current (2026-27) fees?
Why this matters: The rebrand is too recent — a current primary source wasn't located this session.

Sources & Verification

Home — 千代田中学校・高等学校primary source · as of: 2026-09-24Fetched directly. As of the 2025 rebrand, the school operates simply as "千代田中学校・高等学校" (Chiyoda Junior & Senior High School) — the page states "2025年、『千代田中学校・高等学校』が始動しました." No IB DP/DLDP programme is mentioned anywhere on this page, despite third-party reporting (chiyoda-hs-rename-third-party) that the IB programme continues. No dedicated fee page was located this session.
Search synthesis on Chiyoda school renaming history — Multiple (incl. musashino-u.ac.jp press release, Japanese Wikipedia, ibeducation.blog)third-party source · as of: 2026-09-241888: founded as a women's academy. 2018: became coeducational, renamed 武蔵野大学附属千代田高等学院 (Musashino University Affiliated Chiyoda High School), gained IB accreditation. 2024: renamed again to 千代田国際中学校・武蔵野大学附属千代田高等学院. April 2025: renamed a third time to 千代田中学校・高等学校, explicitly dropping both "国際" (International) and "武蔵野大学附属" (Musashino University Affiliated) from the name. Reported that the IB programme (Dual Language DP) and Musashino University internal-recommendation admission routes continue despite the name no longer referencing either. The legacy William Prep directory used the 2018-era name.

Last reviewed by William Prep: 2026-09-24

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