要因 よういん youin main cause JLPT N1 noun no-adjective Common word The kanji in this word 要 need, main point, essence JLPT N3 · Strokes 9 因 cause, factor, be associated with JLPT N3 · Strokes 6 In this level 弓 揺らぐ 緩む 緩める 緩やか 溶液 用件 養護 用紙 様式 Back to the JLPT N1 list Practise these words