How to Apologize in Japanese for Cultural Faux Pas: Saying 'I Didn't Know' and Recovering
Learn intermediate Japanese phrases to apologize when you break an unwritten rule, explain that you didn't know, and repair the situation politely.
By LiamCulture & nuance · Yapr Learn
Sooner or later you will do something in Japan that you did not know was a problem: wear shoes where you should not, use the wrong chopstick etiquette, or speak too casually to a senior. The skill this lesson teaches is recovery, not prevention. You will learn how to apologize for a cultural faux pas, say clearly that you did not know, ask what you should have done, and promise to be careful. The key pattern is 知らなくて (shiranakute, 'not knowing') plus an apology, and the key attitude is to apologize for the trouble your ignorance caused rather than using ignorance as an excuse.
By the end, you can…
- apologize for a cultural faux pas using 知らなくて and 申し訳ありません.
- explain that I did not know a rule or custom without sounding defensive.
- ask what I should have done and promise to be careful next time.
Listen once. Try it slowly. Then say it without looking.
Checking available voices…
すみません、知りませんでした。
I'm sorry, I didn't know.
su-mi-ma-sen, shi-ri-ma-sen de-shi-ta
The most direct, all-purpose recovery line. Use it immediately after someone points out your mistake; it is polite enough for most everyday situations.
申し訳ありません。知らなかったんです。
I am very sorry. I didn't know.
mō-shi-wa-ke a-ri-ma-sen. shi-ra-na-kat-ta-n-desu
More formal and more apologetic. The explanatory んです softens the statement and asks the listener to understand your situation.
知らなくて、本当に失礼しました。
I didn't know, and I was truly rude.
shi-ra-na-ku-te, hon-tō ni shi-tsu-rei shi-ma-shi-ta
Use when your mistake was not just a misunderstanding but a breach of manners, such as entering a home with shoes on.
教えていただき、ありがとうございます。
Thank you for telling me.
o-shi-e-te i-ta-da-ki, a-ri-ga-tō go-zai-ma-su
Follows an apology to show gratitude rather than resentment. Very effective when someone corrects you.
これから気をつけます。
I will be careful from now on.
ko-re ka-ra ki-o tsu-ke-ma-su
A short promise that closes the exchange and signals that you have learned the rule.
Pronunciation guides are approximate. Slow playback keeps the original pitch.
Make it make sense
Useful pattern
The core pattern is 知らなくて、すみません (shiranakute, sumimasen), literally 'not knowing, I'm sorry.' The て-form 知らなくて links your lack of knowledge to the apology. To make it more formal, use 知りませんでした (shirimasen deshita) or 存じませんでした (zonjimasen deshita) in very polite settings. You can also add 大変失礼しました (taihen shitsurei shimashita) when the faux pas was serious. Avoid saying 知らないから (shiranai kara), which sounds like 'because I don't know,' and can sound like an excuse.
When to use it
Use these phrases when someone has just told you that you broke a rule, especially in a home, a workplace, a shrine, or a traditional restaurant. For example, if you step into a genkan with your shoes on, say すみません、知りませんでした。すぐに脱ぎます (sumimasen, shirimasen deshita. sugu ni nugimasu). If you used the wrong honorific with a client, say 申し訳ありません。知らなかったんです。これから気をつけます (mōshiwake arimasen. shiranakatta-n-desu. kore kara ki-o tsukemasu). The apology should come first, the explanation second, and the promise third.
Listen to each line, then take one part and reply out loud.
すみません、それ、箸を立てるのはマナー違反ですよ。
Excuse me, standing chopsticks upright in rice is bad manners.su-mi-ma-sen, so-re, ha-shi-o ta-te-ru-no-wa ma-nā i-han de-su yoあ、知りませんでした。申し訳ありません。
Oh, I didn't know. I'm very sorry.a, shi-ri-ma-sen de-shi-ta. mō-shi-wa-ke a-ri-ma-sen大丈夫ですよ。知らないと分からないですからね。
It's all right. You can't know what you haven't been told.dai-jō-bu de-su yo. shi-ra-nai-to wa-ka-ra-nai-n-de-su ka-ra ne教えていただき、ありがとうございます。これから気をつけます。
Thank you for telling me. I'll be careful from now on.o-shi-e-te i-ta-da-ki, a-ri-ga-tō go-zai-ma-su. ko-re ka-ra ki-o tsu-ke-ma-suA little context goes a long way
In Japanese apologies, the order matters: apologize first, explain second. Saying 知りませんでした before すみません can sound as if you are defending yourself. Also, すみません covers both 'excuse me' and 'I'm sorry,' while ごめんなさい is more personal and often too casual for a workplace or a stranger. When in doubt with someone older or of higher status, use 申し訳ありません or 失礼しました.
One thing to watch for
Saying 知らなかったから、大丈夫です (shiranakatta kara, daijōbu desu), meaning 'It's fine because I didn't know.'
Try this instead: This sounds like you are dismissing the rule. Instead, apologize and accept the correction: 知りませんでした。失礼しました。これから気をつけます (shirimasen deshita. shitsurei shimashita. kore kara ki-o tsukemasu).
Your turn
Try answering out loud before checking a possible answer.
1You accidentally enter a Japanese home with your shoes on. What do you say first?
Show a sample answer
すみません、知りませんでした。すぐに脱ぎます。
This apologizes first, states that you did not know, and shows immediate corrective action. 申し訳ありません is also correct in a more formal context.
2Your coworker tells you that you should not pour your own drink at a nomikai. How do you respond politely?
Show a sample answer
知らなくて、すみません。教えていただき、ありがとうございます。
This combines an apology with gratitude for the correction. You could also say これから気をつけます to promise improvement.
3Which is more appropriate to a client: ごめんなさい、知らなかった or 申し訳ありません、知りませんでした?
Show a sample answer
申し訳ありません、知りませんでした。
申し訳ありません is more formal and appropriate for a client. ごめんなさい is not wrong in casual settings but can sound too light in business contexts.
When you commit a cultural faux pas in Japanese, apologize first with すみません or 申し訳ありません, explain with 知りませんでした, thank the person for correcting you, and promise これから気をつけます.
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