(historical) a special police force organized by the shogunate during the Bakumatsu period

Alternative spelling of 新選組 (Shinsengumi): a special police force organized by the shogunate during the Bakumatsu period

Used other than figuratively or idiomatically: see 一 and 本 (one thing) / Short for 一本勝ち (ippon-gachi, “winning in one blow”).

a comic book, a cartoon book

(baseball) stealing home

core of the issue / this article

hardcore pornography; 'underground' pornography showing uncensored genitals. Technically illegal in Japan.

banned book

a male given name / a male given name

(sumo) official sumo tournament