ゆいいつふじ 唯一不二 LinksSentence search for 唯一不二Sentence search for ゆいいつふじKanji details for 唯, 一, 不 and 二Edit in JMdict Noun, Noun which may take the genitive case particle 'no'1. one and only; uniqueYojijukugo (four character compound) Discussions Log in to talk about this word.