now that I think about it; looking back on it; in retrospect
Used when reflecting on a past event or situation with hindsight, often implying a realization or changed perspective.
Now that I think about it, that moment was a turning point in my life.
In retrospect, he was right.
Phrase composed of 今 (ima, 'now') + 思えば (omoeba, conditional form of 思う, 'to think'). Literally 'if I think now'.