Word Network: 悔いる

Regrettable; frustrating; mortifying.

Kōkai refers to the feeling of regret or remorse over a past action or a missed opportunity. It expresses the desire that a different choice had been made in the past.

Regret, remorse, or repentance.

To regret; to lament; to repent.

A process of self-reflection or introspection where one examines their past actions or thoughts to recognize mistakes. It is often used constructively to think about how to improve oneself for the future.