“Now that you mention it” in Japanese
Short answer
Now that you mention it in Japanese is “そう言えば” (souieba). Full meaning: now that you mention it, come to think of it, that reminds me, on that subject, speaking of which.
Other ways to say “Now that you mention it” in Japanese
言われてみれば
iwaretemireba now that you say that, now that you mention it
そういや
souiya which reminds me ..., come to think of it ..., now that you mention it ..., on that subject ..., so, if you say ...
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