Na-adjective (keiyodoshi)secret; private; surreptitious

NounPeru

Nounsecret (method, trick, etc.); key (e.g. to success); mysteries (of an art, trade, etc.); recipe; trick

Noun, Noun which may take the genitive case particle 'no'(private) secretary · treasured book; secret book

Nounsecret story; unknown episode