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 · 6 entries checked · 5 flagged · 10 issues confirmed · 5 corrected · 5 still open
Akita Prefecture — The entry states that Akita Prefecture was historically part of the ancient provinces of Dewa and Mutsu, but it was entirely within Dewa; Mutsu did not include any part of Akita.
Akita Prefecture — The entry states that in 1871, during the Meiji Restoration, Dewa Province was divided, but modern Akita Prefecture's borders were not finalized until 1876 after merging parts of Mutsu. This is incorrect: Akita Prefecture was created in 1871 from the former De
Aomori Prefecture — Mount Iwaki is not an active volcano; it is classified as a dormant volcano.
Aomori Prefecture — The claim that the Jōmon period continued up to 300 BCE at the Kamegaoka site is incorrect; the Kamegaoka site is associated with the Final Jōmon period (c. 1000–300 BCE), and the Shakōkidogū statuettes found there date to the Late to Final Jōmon period, not s
Chiba Prefecture — The population figure '6,278,060 (1 June 2019)' is incorrect; the official estimated population of Chiba Prefecture as of June 1, 2019, was approximately 6,259,000.
Chiba Prefecture — The claim that the Great Kanto earthquake in September 1923 caused widespread destruction, killing approximately 1,300 people in Chiba City alone, with total prefecture deaths estimated between 1,400 and 1,500, is factually incorrect; the total number of death
Ehime Prefecture — The claim that Dōgo Onsen has been used for over two thousand years is not supported by verifiable historical records; it is a legendary claim, not a confirmed fact.
Ōita Prefecture — The entry omits Miyazaki Prefecture from the list of prefectures bordering Ōita, which is a factual error.
Ōita Prefecture — The population figure '1,081,646 (as of 1 February 2025)' is speculative and not verifiable from official sources as of the knowledge cutoff.
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