Translation guide
A phrase used when a thought suddenly occurs to you, often introducing a new idea or recalling something. In Japanese, it is expressed with various adverbial phrases that signal a shift in thinking.
To introduce a thought that just occurred to you, often mid-conversation, similar to 'now that I think about it' or 'actually'.
The most common and natural way to say 'come to think of it' when you suddenly remember or realize something related to the current topic. Used in casual and polite speech.
To smoothly bring up a new subject that just crossed your mind, often in casual conversation.
そういえば is for spontaneous recollections, while 考えてみれば implies a more conscious reflection. Use そういえば in everyday chat; 考えてみれば when you're analyzing a situation.
Come to think of it, I forgot my wallet. (sudden realization)
Come to think of it, tomorrow is a holiday.
Come to think of it, I haven't replied to him yet.
Literally 'if I try thinking about it', used when you reflect on something and realize a new perspective. Slightly more deliberate than そういえば.
Come to think of it, that's only natural.
Used when someone's remark makes you realize something. 'Now that you mention it' or 'come to think of it' in response to another person.
Come to think of it, you might be right.
Literally 'if I think carefully', used when you reconsider something and change your mind or realize a mistake. More introspective.
Come to think of it, that plan is impossible.
Also works perfectly for this use. It's the go-to phrase for 'by the way, I just thought of something'.
Come to think of it, are you going to the party next week?
A very casual interjection meaning 'Oh, that's right' or 'Oh, I just remembered'. Often used when a thought suddenly pops up.
Oh, come to think of it, I need to buy milk.
考えてみれば、彼の言う通りだ。
Come to think of it, he's right. (after reflection)
Avoid literal translations like 「それについて考えるようになる」. They sound unnatural and are not used as conversational fillers.