then; well; so; well then
じゃあ、先に帰るね。
Well then, I'll head home first.
じゃあ明日の朝また会おう。
Then let's meet again tomorrow morning.
雨が降りそうだし、じゃあ出かけるのはやめよう。
It looks like it might rain, so let's not go out.