過か去こは過か去こ

expression

the past is the past; let bygones be bygones

A set phrase used to accept that past events cannot be changed and should be left behind. Often used when forgiving, moving on, or refusing to dwell on old matters.

• 過か去こは過か去こだ。今いまは前まえに進すすもう。

  The past is the past. Let's move forward now.

• あの失しっ敗ぱいはもう過か去こは過か去こだから、気きにしないで。

  That mistake is water under the bridge now, so don't worry about it.