expression
now (while the time is ripe); while one still can
Used to express that the present moment is the best or only opportunity to do something. Often followed by に.
雨が降らない今のうちに買い物に行こう。
Let's go shopping now while it's not raining.
今のうちに謝ったほうがいいよ。
You'd better apologize now while you still can.