理性 (Risei) is a Japanese noun meaning “reason, reasoning power, (one's) sense”.
Meanings
- nounreason; reasoning power; (one's) sense
Examples
動物には理性がない。
Animals have no reason.
人間は理性の動物である。
Man is a rational animal.
怒りが彼から理性を奪った。
Anger deprived him of his reason.
Sentences from Tatoeba (CC BY 2.0 FR).