要因 (Youin) is a Japanese noun meaning “main cause, primary factor”.
Meanings
- noun, adjectival nounmain cause; primary factor
Examples
健康は幸福の重要な要因だ。
Health is an important factor of happiness.
富は幸福の一要因ではあろう。
Wealth may be a factor of happiness.
その犯罪の第一の要因は何ですか。
What is the main cause of the crime?
Sentences from Tatoeba (CC BY 2.0 FR).