せい 所為 Common word JLPT N3 Show 1 collocation 所為にする - to lay the blame on LinksSentence search for 所為Sentence search for せいKanji details for 所 and 為Edit in JMdict Noun1. consequence; outcome; result; blame; faultUsually written using kana alone, often ...のせいNotes所為: Rarely-used kanji form. Discussions Log in to talk about this word.