What does "II DESU" mean?
To begin with, word "II DESU" is used in the meaning of both the affirmative and the denial.
And, it is a phrase used over many topics like permission, agreement, the proposal, the recommendation, the opinion, information, the denial, anger, and the rejection, etc.
And, the following expressions are chiefly used.
1. いいですよ。[II DESU YO]:(permission, approval, proposal, recommendation, and advice)
2. いいですね。[II DESU NE]: (agreement)
3. いいですか?[II DESU KA?]: (asking for permission(confirms))
4. ...たら いいですか?[...TARA II DESU KA?]: (asking for opinion and information)
5. いいです。/ もういいです。[II DESU/Mooo IIDESU]: (Refusal, rejection, and anger)
1. "II DESU YO" for permission, approval, proposal, recommendation, and advice.
This II DESU YO form is "Sure you can...".
It's an adjective which means "good," "fine," "okay," etc.
"...temo" means something like "if (someone) were to...."
Accordingly, adding "ii desu" makes it "if (someone) were to (do something) it would be okay," "it's okay if (someone does something)," etc.
And, almost all forms of this "II DESU" are "II DESU YO".
Permission Example:
English |
Japanese |
|---|---|
| You can use my PC. | 私 の パソコン を 使って いい です よ。 watashi no PC wo tsukatte ii desu yo. |
| You can watch TV after you've finished your homework. | 宿題 を やったら テレビ を 見て いい(です)よ。 shukudai wo yattara terebi wo mite ii desu yo. |
| You can use my dictionary. | 私 の 辞書 を 使って いい です よ。 watashi no jisho o tsukatte ii desu yo. |
| <Note>: "II DESU(YO)" is a polite form. If you say to your family and friend, you should use "II YO", because "II DESU(YO)" is a polite form. |
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Approval Example:
English |
Japanese |
|---|---|
Okay. |
いい です よ。 |
With pleasure. |
いい です よ。 |
Certainly. |
いい です よ。 |
| Answer if your answer is "YES" when you undertake something as "II DESU YO". | |

Proposal and recommendation: Example:
English |
Japanese |
|---|---|
| Keeping regular hours is good for your health. | 早寝 早起き は 健康 に いい です よ。 hayane hayaoki wa kenkou ni ii desu yo. |
| This sweater fits you very well. | この セーター は あなた に ちょうど いい です よ。 kono seetah wa anata ni choudo ii desu yo. |
| The mountain air would help you get better. | 山 の 空気 は あなた の 健康 回復 に いい です よ。 yama no kuuki wa anata no kenkou kaifuku ni ii desu yo. |
| This "II DESU YO" means "good" or "better". |
|
Advice Example:
English |
Japanese |
|---|---|
| You shouldn't personal e-mail from the computers in the office. | 知らない 人 から の メール は 開かない 方 が いい です よ。 shiranai hito kara no meeru wa hirakanai hou ga ii desu yo. |
| You should see a doctor for advice. | 医者 に 相談 した 方 が いい です よ。 isha ni soudan shita hou ga ii desu yo. |
| Don't underestimate him. | 彼 を 甘く 見ない 方 が いい です よ。 kare wo amaku minai hou ga ii desu yo. |
| The form "方がいいですよ[hou ga ii desu yo]" is often used for "II DESU YO" of advice. This is meaning "You shouldn't do.". |
|
2. "II DESU NE, II DESU YO" for agreement.
This "II DESU NE" is an answer for agreement.
Example:
English |
Japanese |
|---|---|
Sure. |
いい です ね。/いいですよ。 |
How about a drink before dinner? That's great! |
いい です ね。 |
Is this all right? Oh, Okay. |
ああ、いい です ね。/ああ、いい です よ。 |
Let's go for a swim in the pool tomorrow. OK./Yeah, let's. |
明日 プール に 行かない? いい(です)ね。 |

3. "II DESU KA?" for permission.
These are "II DESU KA" when you ask for permission someone.
And, almost all forms of this "II DESU" are "II DESU KA ?".
Example:
English |
Japanese |
|---|---|
|
|
Would you please help me? |
手伝って もらって も いい です か? tetsudatte moratte mo ii desu ka? |
|
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| Are we allowed to take pictures here? | ここ で 写真 を 撮って も いい です か? koko de shashin wo totte mo ii desu ka? |
<Note>: |
|
Column: Ii n desuka vs Ii desu ka
| Understand the difference between "Ii desu ka?" and "Ii n desu ka?" |
|---|
This little "n" thing is difficult to explain, but "n" is often used to refer to something already talked about before. "Ii ndesuka?"("Really? Is THAT ok?") "n" is used for "Ii desuka?" of second time. |
4. "...TARA II DESU KA?" for opinion and information.
This "II DESU KA" is asking for opinion and information.
The meaning is "Where(When, What, etc.) should I ...?" or "What should I do...?".
The form is " .... tara idesuka?"
And use this when you have to cope with difficult situation.
Example:
English |
Japanese |
|---|---|
| Which platform should I go to to get on the Shinkansen train? | 新幹線 に 乗る には 何番線 に 行ったら いいです か? shinkansen ni noru niwa nanbansen ni ittara ii desu ka? |
| Where should I buy shoes ? | どこ で 靴 を 買ったら いい です か? doko de kutsu wo kattara ii desu ka? |
| When should I borrow the book ? | いつ 本 を 借りたら いい です か? itsu hon wo karitara ii desu ka? |
| How should I eat this? | これ は どうやって 食べたら いい です か? kore wa douyatte tabetara ii desu ka? |
| If I have late, what should I do ? | もし 時間 に 間に合わなかったら どうしたら いいですか? moshi jikan ni maniawanakattara doushitara iidesu ka? |
| If I have troubled what should I do? | もし 困った こと が あったら どうしたら いい です か? moshi komatta koto ga attara doushitara ii desu ka? |
Reference: In this way,
Probably, the Japanese is able to understand it. |
|
5. "II DESU, Mooo II DESU" for refusal, rejection, and anger.
This "II DESU" means the refusal.
Almost all Japanese people not use "NO".
Because Japan has the culture that values harmony, the Japanese doesn't use word "NO".
The Japanese think that word "NO" deteriorates the atmosphere of the scene.
Therefore, the Japanese often uses the phrase that shows refusals such as "Kekkou desu" and "Ii desu".
This "II DESU" is the following meanings.
- I'm not in the mood.
- I don't want it.
- I don't want to go.
- I'm reluctant.
"II DESU" is polite and used a lot for conveying a different and negative meaning.

Example:
English |
Japanese |
|---|---|
No, I got it. |
いえ、いい です。 |
How about some coffee? I don't want to drink. |
いい です。 |
I'd like you to come. Sorry, but I can't. |
いい です。遠慮 して おきます。 |

Column: "Mooo ii desu/Mooo iidesu kara"
| What does "Mooo II DESU/ Mooo II DESU KARA" mean? |
|---|
Sometimes you may hear a long mou before the ii. "mou ii desu !". The person who is shouting "Mooo II DESU" is very angry. |
In spite of the same phrase, "IIDESU" is used in various scenes.
Probably you will be confused by these words.
If you are troubled by such a scene, please observe "expression of the Japanese's and behavior" carefully.
If they are nodding, it will be "Consent or approval."
If they are shaking their head, it will be "Refusal."
It is better to ask them their intention once again, when you cannot understand their feeling.
By Hararie



Tokyo Time



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