Japanese Cities Codexery — Data & Quality

We publish our audit record because accuracy claims should be checkable. Every entry on this site runs through an automated fact-audit pipeline (accuracy audit → source-grounded repair → visual QA); this page is generated from that pipeline's own report, not written by hand.

Last full accuracy audit: 2026-08-28 · 5 entries checked · 2 flagged · 4 issues confirmed · 2 corrected · 2 still open

Recent findings (audit lane, verbatim)

Hakodate — Hakodate is the fourth largest city in Hokkaido by population, not the third.

Hakodate — The tombolo formation is dated to around 1000 CE, not 1000 BCE.

Hamamatsu — Hamamatsu is not the largest city in Shizuoka Prefecture by population; Shizuoka City is larger.

Hamamatsu — Hamamatsu is not the second largest government-designated city in Japan by area; it is actually the largest by area among designated cities.

Open data

All content is fetchable as JSON at /data/content/ · llms.txt · sitemap

Corrections

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