思い立っ

思い立っ

"思い立っ" means "to start thinking of doing something" or "to have an idea or impulse to act."

思い立って here means to suddenly decide or come to a realization to take an action.

彼は思い立って、急に旅行を計画しました。

He suddenly decided and planned a trip.

思い立った in this example illustrates the expression that emphasizes the importance of acting on a decision promptly.

思い立ったが吉日と言いますから、早速始めましょう。

As they say, 'when you think of something, any day is a lucky day,' so let's start right away.

思い立つ here is used in the context of reflecting back or recalling memories.

昔のことを思い立つたびに、懐かしい気持ちになります。

Every time I recall old memories, I feel nostalgic.