Notes on verification

Confirmed by multiple independent bibliographic databases (CiNii, NDL Search, Calil) and researcher profile pages, all matching ISBN 978-4-7872-3425-4, publisher Seikyusha, and publication date October 2017. [tier=silver indep_score=0.525 clusters=3 claim_tier=everyday | framework convergence=partial (upstreams: CiNii Books (National Institute of Informatics), National Diet Library (NDL) catalog, JPRO (出版情報登録センター) publisher registration data) — publishers independent, evidence may not be | kind=empirical eligibility=high]