Word一因いちいんListenYour browser has no Japanese voice, so Listen is not available.How to add a Japanese voiceCommonMeaningsNounone cause; one reason; one factorIn SpanishcausaKanji in this word一因Dictionary data: JMdict and KANJIDIC2, property of the EDRDG, used under its licence (CC BY-SA 4.0).(opens in a new tab)