かんじん 肝心 Common word JLPT N1 LinksSentence search for 肝心Sentence search for かんじんSentence search for 肝腎Kanji details for 肝 and 心Edit in JMdict Na-adjective (keiyodoshi), Noun which may take the genitive case particle 'no', Noun1. essential; important; crucial; vital; mainOther forms肝腎 【かんじん】Notes肝腎: Rarely-used kanji form. Discussions Log in to talk about this word.