Notes on verification

Consistently confirmed by publisher (Shogakukan), licensed digital distributor (JapanKnowledge), and Japanese Wikipedia bibliographic data, with no contradicting figures found. [cascade flags: wikipedia_dropped_other_sources_exist | tier=bronze indep_score=0.525 clusters=2 claim_tier=notable | framework convergence=partial on Shogakukan's official publication data for Nihon Kokugo Daijiten 2nd edition (upstreams: Shogakukan (publisher)) — publishers independent, evidence may not be | kind=empirical eligibility=high]