Japan's clocks

OCO verified: every moment answered by a document or a stated reason, every year of every zone accounted for, today's rule read from law, and a patch where the table was wrong. Read in the original and transcribed twice. 9 of 9 moments answered, 140 of 140 zone-years accounted for. The table holds. Every moment it carries agrees with the documents named below. Every phone, computer and airline uses one table of when each country changed its clocks: the IANA Time Zone Database. This record reads Japan's part of it against the country's own documents. What was not checked is written down. Companion page: https://oco.bg/tz/japan. Part of tzOCO, the OCO Time Zone Database, doi:10.5281/zenodo.22710669: one record per territory, each published as it stands and versioned as its reading moves. Author: Ivan Petrov Ivanov, OCO, Sofia, ORCID 0009-0007-6123-351X.