You na adjectives in Japanese, also called な adjectives, use な when they directly modify a noun in the affirmative non-past form: 静かな町 (shizuka na machi, “quiet town”. At the end of the sentence, however, the pattern changes: 町は静かです (Machi wa shizuka desu, “The town is quiet”.
The main rule is not to treat な as a fixed ending of the word. It appears in a specific function. To negate, talk about the past, connect characteristics, or indicate change, な adjectives follow other patterns.
What are adjectives in Japanese?
な adjectives describe qualities, states, preferences, and evaluations. Some frequent examples are 静か (shizuka, quiet), 便利 (benri, practical or convenient), 有名 (yūmei, famous), きれい (kirei, beautiful or clean), and 好き (suki, which one likes).
The name “な-adjective” comes from the pattern used before a noun: 静かな部屋 (shizuka na heya), “quiet room”. This does not mean that the dictionary form is 静かな nor that every occurrence requires な.
It is also not safe to classify the word by its last letter. きれい visually ends in い, but belongs to the な group: say きれいな公園, not きれいい公園. The general guide adjectives in japanese compares the two classes, while the article on い adjectives delves deeper into the other pattern.
Frequent な-adjectives to learn with the class
Memorize each word along with the pattern used before a noun. This is more reliable than trying to guess the class by spelling.
| Word | Reading | Common meaning | With noun |
|---|---|---|---|
| 静か | shizuka | quiet; silent | 静かな場所 |
| 便利 | benri | practical; convenient | 便利な道具 |
| genki | genki | healthy; well | a healthy child |
| 大切 | taisetsu | important; precious | an important book |
| kantan | kantan | simple; easy | a simple problem |
| きれい | kirei | pretty; clean | a clean room |
| 好き | suki | liked; favorite | favorite music |
好き deserves attention because it often corresponds to “to like” in translation, but it does not function as a verb. In I like Japanese (Watashi wa Nihongo ga suki desu), the construction presents Japanese as the thing that is liked.
When to use な and when not to use it
Use な between the adjective and the noun in the affirmative non-past form. In the polite predicate, use the adjective followed by です, without な.
| Function | Structure | Example | Translation |
|---|---|---|---|
| Before the noun | Na-adj + な + noun | Convenient app | practical app |
| In the predicate | topic + は + ナA + です | This app is convenient. | This app is practical. |
O Irodori from the Japan Foundation presents the contrast between ナA-な N and ナA-です. This difference avoids forms like 便利なです, which mix the two constructions.
In negative or past forms before a noun, な also does not remain:
- 静かじゃない町 — city that is not quiet;
- 静かだった町 — city that was quiet;
- 静かじゃなかった町 — city that was not quiet.
The four main forms of adjectives
Organize the forms by two choices: non-past or past and affirmative or negative. The plain style is common in informal conversations and grammatical structures; the polite style is suitable for more formal situations.
| Form | Plain form | Common polite form |
|---|---|---|
| Non-past affirmative | 静かだ | It is quiet |
| Non-past negative | It is not quiet | It is not quiet (polite) / It is not quiet (formal) |
| Affirmative past | It was quiet | It was quiet (polite) |
| negative past | It was not quiet | It was not quiet (polite) / It was not quiet (formal) |
THE Marugoto conjugation table, from the Japan Foundation, records the four polite forms. The Irodori material on the past confirms patterns like きれいでした and 大変じゃなかったです.
What is the difference between じゃないです and ではありません?
Both forms can produce a polite negative. じゃないです is common in speech and everyday situations; ではありません is more formal. In the past, compare じゃなかったです and ではありませんでした. Choose the register according to the situation, without changing the core meaning.
Instead of thinking that です is simply the “verb to be,” look at the whole sentence. The article about です in Japanese explains in more detail the relationship between predication, tense, and politeness.
How to connect adjectives with ～で
To link a な adjective to another characteristic or continuation, use ～で:
この町は静かで、便利です。
This town is quiet and convenient.
Kono machi wa shizuka de, benri desu.
This city is quiet and practical.
O Irodori teaches ナA-で to connect characteristics. Compare with the pattern of い adjectives, which uses ～くて. Depending on the relationship between the parts, ～で can also present a cause or reason.
How to indicate manner and change with ～に
The form in ～に can show how an action happens:
静かに話してください。
しずかに はなしてください。
Shizuka ni hanashite kudasai.
Please speak quietly.
With なる, the pattern ナA + に + なる indicates a change of state:
町がにぎやかになりました。
まちが にぎやかに なりました。
Machi ga nigiyaka ni narimashita.
The town became lively.
The Japan Foundation records ナA-に なります as a pattern of change. To fit these structures into complete sentences, review the method of Japanese sentence formation.
Common mistakes with adjectives in
- Add な at the end of the sentence: say 部屋は静かです, not 部屋は静かなです.
- Omit な before the noun: say 静かな部屋, not 静か部屋.
- Keep な in all forms: the negative is It is not quiet, and the past is It was quiet.
- Classify only by appearance: きれい and 嫌い end in い, but they are な adjectives.
- Confuse で of connection with the place particle: in 静かで便利です, で connects two characteristics.
These contrasts become clearer when you understand the function of each element. If you need to review topic, predicate, and particles, see the Basics of Japanese Grammar.
Short dialogue with adjectives in the
A: 新しい図書館はどうですか。
あたらしい としょかんは どうですか。
Atarashii toshokan wa dō desu ka?
How is the new library?
B: 静かで、きれいです。勉強に便利ですよ。
しずかで、きれいです。べんきょうに べんりですよ。
Shizuka de, kirei desu. Benkyō ni benri desu yo.
It's quiet and clean. It's convenient for studying.
A: 前の図書館も静かでしたか。
まえの としょかんも しずかでしたか。
Mae no toshokan mo shizuka deshita ka?
Was the previous library also quiet?
B: いいえ、あまり静かじゃなかったです。
いいえ、あまり しずかじゃなかったです。
Iie, amari shizuka janakatta desu.
No, it wasn't very quiet.
Commented exercise
- Complete “uma pessoa famosa”: 有名な人.
- Passe 便利です para a negativa simples: 便利じゃない.
- Passe It is quiet para o passado educado: It was quiet (polite).
- Una きれいです and 便利です: きれいで、便利です.
- Expresse “ficou famoso”: 有名になりました.
A regra de consulta rápida é: use な apenas diante do substantivo na forma afirmativa não passada; use だ／です no predicado, じゃない in the negative, だった／でした no passado, で to connect and に before なる or to modify an action.
What are adjectives in Japanese?
These are words that describe qualities, states, or evaluations and use な before a noun in the affirmative non-past form, such as 静かな町. In the polite predicate, they appear without な, as in 町は静かです。
When should I use な after an adjective?
Use な when the adjective directly modifies a noun in the affirmative non-past form: 便利なアプリ. Do not use な before です nor keep it automatically in the negative or past tense.
How to put an adjective in the negative form?
In the simple form, use じゃない, like 静かじゃない. In polite style, 静かじゃないです is common, as is the more formal alternative 静かではありません.
How to put an adjective in the past tense?
In the simple affirmative form, use だった: 静かだった. In the polite form, use でした: 静かでした. The negative past can be 静かじゃなかった or 静かじゃなかったです.
What is the difference between i-adjectives and na-adjectives?
い-adjectives keep the い before the noun and use forms like くない and かった. な-adjectives take な before the noun and use patterns like じゃない, だった, で, and に.