あとのまつり【後の祭り】 (atonomatsuri) |
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 | being too late (to be of any use); the doctor after death; shutting the stable door after the horse is stolen [has bolted]. |
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 | 今となっては後の祭りだ. It is too late now (to do anything). | You've come a day (too late) after the fair. | The damage is done. |
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 | ・今ごろ悔やんでも後の祭りだ. It's too late regretting it now. | It's too late for regrets now. | It's too late now to regret (what you did). |