Japanese phrase
約束を守れなくてごめん。 yaku soku o mamo re na ku te go me n
Meaning
Sorry I couldn't keep my promise.
When to use it
Apologizes for not keeping a promise. It sounds sincere and fits everyday conversations with friends or family.
Example dialogue
一緒に遊ぶって言ったのに、約束を守れなくてごめん。 is sho ni aso bu tte i tta no ni yaku soku o mamo re na ku te go me n
I said we'd play together, but I'm sorry I couldn't keep my promise.
ううん、また遊べばいいよ。 ū n ma ta aso be ba i i yo
No worries. We can play another time.