もしそうなら

expression

if so; in that case

A conditional phrase used to introduce a consequence or question based on a preceding statement. Common in both spoken and written Japanese.

• もしそうなら、すぐに出しゅっ発ぱつしましょう。

  If so, let's leave right away.

• もしそうなら、なぜ教おしえてくれなかったの？

  If that's the case, why didn't you tell me?