How to Say "No Problem" in Japanese

問題ない

mondai nai

In Japanese, "no problem" can be expressed as 問題ない (mondai nai).

This phrase is used to reassure someone that an error or mistake they made is not an issue and requires no apology.

Meaning: no apology is necessary (intj)

What does it mean word for word?

The phrase is composed of mondai (problem) and nai (does not exist/none).

While 問題ない focuses on the absence of a problem, 大丈夫 is a more common, versatile way to say "it's okay" or "no problem" in daily conversation.

To make the phrase polite, replace the informal nai with the polite form arimasen, resulting in 問題ありません.

mondai nai

If you say 問題ない to a person much older than you, it can unintentionally sound patronizing, as if you are 'granting' them permission to have made the mistake.
The kanji for 'problem' in 問題 consists of the characters for 'question' and 'title', reflecting a historical way of categorizing topics of discussion.
In Japanese business culture, if a superior says 問題ない, it often functions as a command to proceed with a plan rather than just a reassurance that a mistake was forgiven.

問題ないよ。
No problem!
Tatoeba #79868 by tommy_san, translation #413611 by blay_paul
全然問題ないよ！
No problem at all!
Tatoeba #9328935 by small_snow, translation #21085 by blay_paul
問題ない。君は自分の仕事だけしていればいい。
No problem. You can just do your job.
Tatoeba #10079749 by Sim5634, translation #12006854 by Winter
Person A: お手伝いいただきありがとうございました。 Person B: 大丈夫です。
Person A: Thank you for your help. Person B: No problem.
Person A: 遅くなってごめんね。 Person B: 大丈夫だよ。
Person A: Sorry for being late. Person B: No problem. It's okay.
Person A: 電車を間違えた。 Person B: 大丈夫、平気だよ。
Person A: I took the wrong train. Person B: No problem, it's fine.
3 more sentences on Tatoeba

Kenta apologizes to Yui for being late to their meeting.

Sources

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