申し訳ありません。
Mōshiwake arimasen.
I sincerely apologise.
- Word for word
- “There is no excuse.”
- Politeness: Formal
- Honorific or humble language, or a set business phrase. Customer service, email, speeches.
- When you would say it
- To customers, clients and superiors, for real mistakes.
- Worth knowing
- Even more formal: 申し訳ございません. Use it for a mistake, not for a small bump.