Translation guide
Expressing a change in one's feelings, opinion, or decision, often implying a reversal or reconsideration.
To express that someone has changed their mind about a previous stance, plan, or belief.
A common, natural way to say 'change one's mind'. Literally 'one's ki (mind/spirit) changes'. Used for personal decisions or feelings.
I was planning to go at first, but I had a change of heart.
He suddenly had a change of heart and decided not to quit his job.
Literally 'one's thinking changes'. Slightly more rational or opinion-focused than 気が変わる.
After the discussion, he had a change of heart.
A more literary or dramatic term for a change of heart, often implying fickleness or a shift in affection/loyalty.
Her change of heart was sudden.
To describe a profound shift in someone's attitude, often from negative to positive, such as becoming kinder or more honest.
Means to reform oneself, turn over a new leaf, or have a moral awakening. Often used for criminals or people with bad habits.
He had a change of heart in prison.
I had a change of heart and decided to live honestly.
Means reflection or self-examination, often leading to a change of heart. Used as a noun or with する.
To indicate that someone decided not to do something they previously intended to do.
気が変わる is for everyday changes of mind (e.g., plans, preferences). 改心する is for moral or ethical reform, often in serious contexts like crime or bad behavior.
I was going to have Japanese for lunch, but I changed my mind and went for Italian.
He admitted his crime and had a change of heart.
Avoid directly translating 'change of heart' as 心の変化 (こころのへんか). While understandable, it sounds unnatural and clinical. Use the idiomatic expressions above instead.
Literally 'replace one's heart'. Implies a conscious decision to change one's ways or attitude for the better.
I'll have a change of heart and devote myself to studying.
反省して、もう嘘はつかないと決めた。
After reflecting, I had a change of heart and decided not to lie anymore.
He had a change of heart about resigning.