せい 所為か LinksSentence search for 所為かSentence search for せいかKanji details for 所 and 為Edit in JMdict Expressions (phrases, clauses, etc.)1. it may be becauseUsually written using kana aloneぎょうざのぐ具のあまりは?ギョーザ餃子をいえ家でつく作りましたが、かわ皮がすく少なかったせいか、ぐ具がすこ少しあま余ってしまいました。Gyoza stuffing? I made some gyoza at home but, possibly because I didn't have enough dough, I had some of the filling left over. Discussions Log in to talk about this word.