Kōshin'etsu region, including prefectures of Yamanashi, Nagano, and Niigata in Japan

pornographic publication (magazine, book, etc.); smut

a surname

a book missing a large proportion of its scrolls

(slang, euphemistic) doujinshi, especially those with adult themes

(bibliography) existing / surviving copy

Kyūjitai form of 本拠

Benxi (a city in China)

a book published as an independent volume (as opposed to one of a series of publications)

the main written work, book, or document / the real written work, book, or document / this or the aforementioned or the relevant written work, book, or document