“By any chance” in Japanese
Short answer
By any chance in Japanese is “万万一” (banbanichi). Full meaning: by any chance, ten thousand to one.
Other ways to say “By any chance” in Japanese
ひょっとして
hyottoshite by any chance, (should) it happen (that), by some chance
若しかして
moshikashite perhaps, possibly, maybe, by any chance, if I'm not mistaken; if, in case, in the event that
若しかしたら
moshikashitara perhaps, maybe, perchance, by some chance, by any chance
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