そう言えば

come to think of it

→ そう
phrase Rare #23,295
come to think of it Used to introduce a thought or reminder that has just occurred to the speaker, often in response to something previously mentioned. It can also mean “now that you mention it.”
JA: そう言えば、明日はトムの誕生日だね。
EN: Come to think of it, tomorrow is Tom’s birthday.

そう言えば僕を勘当させないことにした

Come to think of it, they decided not to disown me.

— ビッグ・シック ぼくたちの大いなる目ざめ (2017)

どういうわけで渡辺さんの人柄急にあんなふうにどうもそう言えばそうだな

How come Watanabe’s personality suddenly became like that? Hmm, now that you mention it, I suppose so.

— 生きる (1952)

そう言えば買い物したいな

Come to think of it, I want to do some shopping too.

そう言えばそうだ

Come to think of it, that's true.

そう言えばそうか

Now that you mention it, maybe you're right…

— ラブ・アクチュアリー (2003)

そう言えば簡単です

Speaking of which, is it easy?

— 別れる決心 (2022)

そう言えば最近トム会ってない

Come to think of it, I haven't seen Tom lately.

それならそう言えばいいだろう

Then you should just say so, shouldn't you?

— セッション (2014)

そう言えば小さすぎるわよその指輪

Come to think of it, that ring is way too small.