今いまとなっては

expression

now (that it's come to this); at this stage; after all this time

Expresses that the situation has changed or that something is too late now. Often implies regret, resignation, or a contrast with the past.

• 今いまとなっては、あの時ときの決けつ断だんが間ま違ちがいだったと分わかる。

  Now, I realize that decision back then was a mistake.

• 今いまとなってはもう遅おそい。

  It's too late now.