noun
underground publication; samizdat
Refers to publishing or distributing materials outside official or mainstream channels, often to avoid censorship or legal restrictions.
その地下出版は検閲を逃れるために秘密裏に配られた。
The underground publication was distributed secretly to evade censorship.
Compound of 地下 (underground, secret) and 出版 (publishing). The term is a straightforward modern coinage, likely influenced by English 'underground press' or Russian 'samizdat'.