Japanese Grammar

Explanation & Emphasis: ใ€œใ‚“ใงใ™ / ใ€œใฎใงใ™

The grammar ~n desu / ~no desu is incredibly common in spoken Japanese, but hard to translate directly. It signals that you are providing an EXPLANATION or seeking one.

What does ~n desu mean?

Think of ~n desu as adding the nuance: 'The fact is that...' or 'The reason is that...' or simply 'You see,...'. It signals to the listener that what follows is relevant context or an explanation.

GIVING an explanation: 'Sushi o tabemasen.' (I don't eat sushi) is a plain fact. 'Sushi o taberarenain desu.' (The fact is I can't eat sushi) โ€” implies there's a reason, like an allergy.

SEEKING an explanation: 'Dou shitan desu ka?' means 'What happened / What's the matter?' (Asking for an explanation of an unusual situation).

How to form ~n desu

Verbs and I-Adjectives
Rule
โ†’Plain Form + ใ‚“ใงใ™ / ใฎใงใ™
Just add 'n desu' or 'no desu' to the plain form
่กŒใ (iku)
โ†’่กŒใใ‚“ใงใ™ (iku n desu)
The fact is (I) am going / (I) go because...
้ซ˜ใ„ (takai)
โ†’้ซ˜ใ„ใ‚“ใงใ™ (takai n desu)
The thing is, it's expensive...
Na-Adjectives and Nouns
IMPORTANT: Drop ใ , add ใชใ‚“ใงใ™
โ†’ใช + ใ‚“ใงใ™
Na-adj/noun: add 'na' BEFORE n desu
ๅ…ƒๆฐ—ใ  (genki da)
โ†’ๅ…ƒๆฐ—ใชใ‚“ใงใ™ (genki na n desu)
The thing is, (I) am well...
ๅญฆ็”Ÿใ  (gakusei da)
โ†’ๅญฆ็”Ÿใชใ‚“ใงใ™ (gakusei na n desu)
The fact is, (I) am a student...
Casual Speech
In casual speech
โ†’Plain Form + ใ‚“ใ  (n da)
Replace 'desu' with 'da' for casual
่กŒใใ‚“ใ  (iku n da)
โ†’่กŒใใ‚“ใ ๏ผ
Oh, so you're going! (Realization)
Question: ่กŒใใฎ๏ผŸ
โ†’Iku no?
Are you going? (Seeking explanation/confirmation)

Example Sentences

็†ฑใŒใ‚ใ‚‹ใ‚“ใงใ™ใ€‚ใ ใ‹ใ‚‰ใ€ไปŠๆ—ฅใฏไผ‘ใฟใพใ™ใ€‚
Netsu ga aru n desu. Dakara, kyou wa yasumimasu.
The thing is, I have a fever. That's why I'm taking today off. (Explanation)
ใฉใ†ใ—ใŸใ‚“ใงใ™ใ‹๏ผŸ
Dou shita n desu ka?
What's the matter? / What happened? (Seeking explanation)
ใ“ใ‚Œใ€้ซ˜ใ„ใ‚“ใ ใ‚ˆ๏ผ
Kore, takai n da yo!
This is expensive, you know! (Emphasizing a fact)

Teacher's Advice

Overusing ~n desu

~n desu makes everything sound like you are explaining yourself, which can feel like over-justifying in some contexts. For simple factual statements with no implied explanation, just use the plain masu/desu form. Use ~n desu when there is an emotional or contextual reason behind what you are saying.

JLPT Exam Patterns

  • โ€ขNa-adjectives and nouns use 'na' before n desu: ๅ…ƒๆฐ—ใ€Žใชใ€ใ‚“ใงใ™ (N4)
  • โ€ขUsing ~n desu ka to ask for an explanation in conversation (N4)
  • โ€ข~n da is the casual equivalent for dialogue questions in the N4 reading section

Sound More Natural

Practice adding ~n desu to sentences to make explanations feel natural.

Start Practice โ†’
Japanese ใ€œใ‚“ใ  / ใ€œใฎใ  (n da / no da): Explanation & Emphasis | Nihongo Pass