いっしゅん 一瞬 Common word JLPT N3 Wanikani level 46 Play audio LinksSentence search for 一瞬Sentence search for いっしゅんKanji details for 一 and 瞬Edit in JMdict Noun, Adverb (fukushi)1. instant; moment; for an instant Discussions Log in to talk about this word.