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.
最初は行くつもりだったけど、気が変わった。
I was planning to go at first, but I had a change of heart.
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.
彼は刑務所で改心した。
He had a change of heart in prison.
To indicate that someone decided not to do something they previously intended to do.
A very common casual expression meaning 'after all, I'll stop/pass'. Implies a change of heart based on second thoughts.
買おうと思ったけど、やっぱりやめた。
I was going to buy it, but I had a change of heart.
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.
ランチは和食にしようと思ったけど、気が変わってイタリアンにした。
I was going to have Japanese for lunch, but I changed my mind and went for Italian.
彼は罪を認めて改心した。
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.
彼は急に気が変わって、会社を辞めないことにした。
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.
話し合いの後で、彼の考えが変わった。
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.
彼女の心変わりは突然だった。
Her change of heart was sudden.
I had a change of heart and decided to live honestly.
Literally 'replace one's heart'. Implies a conscious decision to change one's ways or attitude for the better.
心を入れ替えて、勉強に励みます。
I'll have a change of heart and devote myself to studying.
Means reflection or self-examination, often leading to a change of heart. Used as a noun or with する.
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.
Literally 'rethink'. Used when reconsidering a decision and often changing it.
彼は辞職を思い直した。
He had a change of heart about resigning.