YOU SAID:

You'll live to regret it, young fellow! Why didn't you go too?

INTO JAPANESE

君は一生後悔することになるよ、若者よ！ 君もなぜ行かなかったんだ？

BACK INTO ENGLISH

You'll regret it for the rest of your life, young man! Why didn't you go too?

INTO JAPANESE

一生後悔することになるぞ、若者よ！ 君もなぜ行かなかったのか？

BACK INTO ENGLISH

You'll regret it for the rest of your life, young man! Why didn't you go too?