よあ 夜明かし LinksSentence search for 夜明かしSentence search for よあかしSentence search for 夜明しKanji details for 夜 and 明Edit in JMdict Noun, Suru verb, Intransitive verb1. staying up all night; all-night vigilOther forms夜明し 【よあかし】 Discussions Log in to talk about this word.