いちにちじゅう 一日中 Common word LinksSentence search for 一日中Sentence search for いちにちじゅうSentence search for 1日中Kanji details for 一, 日 and 中Edit in JMdict Adverb (fukushi), Noun1. all day long; all the day; throughout the dayOther forms1日中 【いちにちじゅう】 Discussions Log in to talk about this word.