いっそう 一曹 LinksSentence search for 一曹Sentence search for いっそうSentence search for 1曹Kanji details for 一 and 曹Edit in JMdict Noun1. master sergeant (JGSDF)Military, Abbreviation, See also 一等陸曹Other forms1曹 【いっそう】 Discussions Log in to talk about this word.