LESSON NOTES · レッスンノート

N5How you sound · Sep 22, 2026

大丈夫だいじょうぶ (daijoubu): the word that means yes, no, and "are you okay?

大丈夫だいじょうぶ means "fine / all right / no problem," but in modern spoken Japanese 大丈夫だいじょうぶです is just as often a soft refusal — "no thanks" — and the only reliable way to tell is the situation you are in.

It is one of the first words learners meet and one of the last they use confidently, because a single 大丈夫だいじょうぶです can accept an offer or decline it. Japanese speakers navigate this by context, and so can you, once you know which contexts push it which way.

The basics

What does 大丈夫だいじょうぶ actually mean?

The core sense is "there is no problem here" — safe, unharmed, functioning, acceptable. It covers a range that English splits between several words.

大丈夫だいじょうぶですか。 — Are you okay? (polite, to someone who tripped, looks pale, or seems stuck) 大丈夫だいじょうぶです。 — I'm fine. (polite, answering that question) 明日あしたでも大丈夫だいじょうぶですか。 — Would tomorrow be all right? (polite, checking a plan)

The kanji are worth a glance: 大丈夫だいじょうぶ originally described a fine, sturdy man, and the sense drifted through "reliable" to "nothing to worry about." Nothing in the modern word is about men, but the "sturdy, no cause for concern" flavour survives.

How do you ask if someone is okay?

大丈夫だいじょうぶですか is the standard, and the casual 大丈夫だいじょうぶ? is extremely common — a friend sees you wince and says one word.

大丈夫だいじょうぶ? — You okay? (casual, friends and family) お怪我けがは大丈夫だいじょうぶですか。 — Is your injury all right? (polite, asking about something specific)

One caution: 大丈夫だいじょうぶですか aimed at a superior's work can land as doubting them. Asking your boss 資料しりょうは大丈夫だいじょうぶですか ("are the documents okay?") reads closer to "sure you did that right?" than you intend. For that direction, 何なにかお手伝てつだいできることはありますか ("is there anything I can help with?") is the safer phrasing.

Why does 大丈夫だいじょうぶです sometimes mean "no"?

Because refusing directly is avoided, and "I'm fine [as I am]" does the job of "no thank you" without the word no. This is now the default reading at a shop counter.

袋ふくろは大丈夫だいじょうぶです。 — I don't need a bag. (polite, declining) お箸はしは大丈夫だいじょうぶですか。 — Do you need chopsticks? (polite, the staff asking)

So the same word appears on both sides: the clerk uses it to offer, the customer uses it to decline. If you want a bag, 大丈夫だいじょうぶです is exactly the wrong answer — say お願ねがいします instead. This soft-refusal habit is part of a larger pattern in how to say no in Japanese, where the direct word いいえ is almost never used.

How do I make sure I am understood?

Attach something that points in one direction. A bare 大丈夫だいじょうぶです is the ambiguous version; a 大丈夫だいじょうぶです with a verb or a はい/いいえ in front of it is not.

はい、大丈夫だいじょうぶです。 — Yes, that's fine. (accepting) あ、大丈夫だいじょうぶです。ありがとうございます。 — Ah, I'm fine, thank you. (declining, warmly) お願ねがいします。 — Yes please. (accepting an offer — the clearest option) 結構けっこうです。 — No thank you. (declining; correct but can sound curt)

The practical rule: to accept, say お願ねがいします. To decline, say 大丈夫だいじょうぶです. Reserve 結構けっこうです for situations where you want a firmer no, because its tone is harder than learners expect.

Beyond the basics

Which meaning is it? A table by situation

Situation 大丈夫だいじょうぶです most likely means
Someone asks if you are hurt I'm fine / unhurt
Shop staff offers a bag, receipt, chopsticks No thanks
A friend offers you more food No thanks, I'm full
Someone apologises to you It's okay, don't worry
Someone asks if a time or date works That works for me
Someone asks if you can do a task I can manage it
Someone offers help you do want ⚠ Ambiguous — say お願ねがいします instead

The pattern: after a question about your condition, it means "I'm fine." After an offer, it means "no thanks." Almost every confusing case is an offer you actually wanted to accept.

Is 大丈夫だいじょうぶ a noun, an adjective, or what?

It is a な-adjective, which is why it behaves the way it does in longer sentences.

大丈夫だいじょうぶな人ひと。 — A reliable person / someone who will be fine. (な before a noun) 大丈夫だいじょうぶじゃない。 — Not okay. (casual negative) 大丈夫だいじょうぶでした。 — It was fine. (polite past)

The trap is the same one every な-adjective sets: no です in front of な, and the past tense goes on the copula, not the word. 大丈夫だいじょうぶかったです does not exist. If that distinction is shaky, い-adjectives vs な-adjectives is the underlying rule.

How casual can it get?

Very. The middle syllable collapses in speech, and in text it gets shortened further.

だいじょぶ? — You okay? (casual, the everyday spoken form) 大丈夫だいじょうぶだよ。 — I'm fine, really. (casual, reassuring) だいじょばない。 — Not okay. (joke form, treating it like a verb — young, playful, not standard)

だいじょばない is a deliberate joke and worth recognising rather than using. It shows up in casual text and manga because Japanese speakers enjoy conjugating words that cannot be conjugated.

Is there a formal version?

Yes: 大丈夫だいじょうぶでしょうか softens a question, and 問題もんだいございません replaces it entirely in business settings.

日程にっていは大丈夫だいじょうぶでしょうか。 — Would the schedule be all right? (polite, softer than 大丈夫だいじょうぶですか) 問題もんだいございません。 — There is no problem. (formal, business)

In written business Japanese, 大丈夫だいじょうぶ can read as slightly casual — 可能かのうでしょうか or 差し支さしつかえありません often replace it. This is the same register ladder as everywhere else, and choosing a rung is the skill described in keigo vs casual.

Do Japanese people argue about this word?

They do, and the argument tells you something useful. Older speakers complain that young people use 大丈夫だいじょうぶです for refusals where 結構けっこうです or いいえ would be clearer. The complaint is losing: in shops and restaurants the refusal sense is now ordinary from speakers of every age, including the ones complaining.

What this means for a learner is that you will meet both readings and should not treat either as an error. The safety net is the one above — say お願ねがいします when you mean yes, and nobody can misread you.

Common mistakes

  • Saying 大丈夫だいじょうぶです when you want the thing. The commonest learner accident in a convenience store. You have politely declined the bag you needed. Use お願ねがいします.
  • Using 結構けっこうです to be polite. It is polite, but it lands firm and slightly cold. 大丈夫だいじょうぶです is the warmer refusal.
  • 大丈夫だいじょうぶかったです. な-adjectives do not take い-adjective endings. The past is 大丈夫だいじょうぶでした.
  • Asking a superior 大丈夫だいじょうぶですか about their work. It reads as doubting them. Offer help instead of checking up.
  • Assuming a 大丈夫だいじょうぶ answer means everything is genuinely fine. It is also the standard way to wave off concern. If someone looks unwell and says 大丈夫だいじょうぶです, that is a social answer, not a medical one — see how to say "I'm sick" for the vocabulary that follows.

Practice

Answers are hidden — build yours first, then open. Questions 1 and 2 are a pair: the same offer, two different intentions.

1. At a convenience store, the clerk asks 袋ふくろはいりますか. You want a bag.

Show answer

お願ねがいします — the clear "yes please." 大丈夫だいじょうぶです here would decline the bag you wanted, which is the single most common learner mistake with this word.

2. Same question, but you have your own bag.

Show answer

大丈夫だいじょうぶです — the standard soft refusal. いいえ would be understood but sounds unnecessarily blunt.

3. A friend trips on the street in front of you. One word.

Show answer

大丈夫だいじょうぶ? — the casual condition question. Rising intonation carries the whole sentence.

4. Someone apologises for being five minutes late. Reassure them.

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大丈夫だいじょうぶですよ — the よ adds warmth and tells them there is genuinely nothing to worry about.

5. Make 大丈夫だいじょうぶ modify the noun 人ひと ("a person who will be fine").

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大丈夫だいじょうぶな人ひと — 大丈夫だいじょうぶ is a な-adjective, so it takes な before a noun. 大丈夫だいじょうぶの人ひと is wrong.

6. Say "it was fine" in polite past tense.

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大丈夫だいじょうぶでした — the past goes on です, not on the adjective. 大丈夫だいじょうぶかったです does not exist.

7. Ask a client, politely and softly, whether Friday works.

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金曜日きんようびは大丈夫だいじょうぶでしょうか — でしょうか is softer than ですか because it leaves them room to say no.

8. Your boss asks whether you can finish by tonight, and you can.

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大丈夫だいじょうぶです — after a question about your capacity, this reads as "I can manage it." Adding はい in front removes any doubt.

9. Say "not okay" casually.

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大丈夫だいじょうぶじゃない — negative of a な-adjective. The polite version is 大丈夫だいじょうぶじゃないです or 大丈夫だいじょうぶではありません.

10. A waiter asks if you want more water, and you do not.

Show answer

大丈夫だいじょうぶです、ありがとうございます — refusal plus thanks. Adding the thank-you is what keeps a bare 大丈夫だいじょうぶです from sounding abrupt.

FAQ

Is 大丈夫だいじょうぶ rude? No. It is neutral and extremely common. Only the bare-refusal version can feel abrupt, and adding ありがとうございます fixes that entirely.

What is the difference between 大丈夫だいじょうぶ and 結構けっこうです? Both can decline. 結構けっこうです is firmer and more formal, and it can sound cold from a customer to staff. 大丈夫だいじょうぶです is the everyday warm refusal.

Can I use 大丈夫だいじょうぶ to mean "okay" as in agreeing to a plan? Yes — 明日あしたで大丈夫だいじょうぶです means "tomorrow works for me." For plans and times, the accepting reading is the normal one.

Does 大丈夫だいじょうぶ work in writing? In messages and casual email, yes. In formal business writing it reads slightly casual; 問題もんだいございません or 差し支さしつかえありません are the formal equivalents.

Why do I hear だいじょぶ without the う? Ordinary spoken reduction, like "probably" becoming "probly" in English. Both spellings point at the same word, and だいじょぶ is what you will actually hear.

How do I answer 大丈夫だいじょうぶですか if I am not okay? いえ、ちょっと… trailing off, or 実じつは…, followed by what is wrong. A flat 大丈夫だいじょうぶじゃないです is grammatical but sounds dramatic — Japanese usually softens the admission.

Vocabulary from this article

Tap the block to select all of it, then copy. In Anki: File → Import, note type Basic, separator Tab — the first column becomes the front, the second the back.

大丈夫	だいじょうぶ — fine, all right, no problem; also "no thanks"
大丈夫ですか	だいじょうぶですか — are you okay?; is it all right?
大丈夫でしょうか	だいじょうぶでしょうか — would that be all right? (softer)
大丈夫でした	だいじょうぶでした — it was fine
大丈夫じゃない	だいじょうぶじゃない — not okay (casual)
お願いします	おねがいします — yes please; I'd like that
結構です	けっこうです — no thank you (firm, formal)
問題	もんだい — problem
問題ございません	もんだいございません — there is no problem (formal)
袋	ふくろ — bag
お箸	おはし — chopsticks
怪我	けが — injury
日程	にってい — schedule, dates
差し支えありません	さしつかえありません — there is no inconvenience (formal)
実は	じつは — actually, to tell the truth

I'm Yuuki, a Japanese teacher based in Tokyo. I've taught on italki as a Top 1% teacher and watched over 1,500 anime. Every student who spends a week in Japan comes back with the same story: they said 大丈夫だいじょうぶです at a register and did not get the thing they wanted. It is the one word where knowing the grammar does not save you — only knowing the situation does.

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Sources: the author's own lessons and standard reference grammars.

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