げんいん 原因 Common word JLPT N4 Wanikani level 17 Play audio LinksSentence search for 原因Sentence search for げんいんSentence search for げいいんKanji details for 原 and 因Edit in JMdict Noun, Suru verb, Intransitive verb1. cause; origin; sourceOther forms原因 【げいいん】Notesげいいん: Irregular kana usage. Discussions Log in to talk about this word.