Basic Negation in Japanese

In Brief

Japanese does not use one separate word equivalent to English “not.” Instead, the ending changes according to what is being negated: verbs use ません or a ない-form, い-adjectives use くない, and な-adjectives and nouns use forms such as じゃない or ではありません. For a safe, polite beginner style, use ません with verbs and ～くないです / ～じゃないです or the more formal ～くありません / ～ではありません with descriptions.

Overview

Negation means making a statement negative: “I do not go,” “it is not expensive,” or “she is not a student.” In English, the word not does much of this work. Japanese usually changes the end of the predicate—the part that says what someone does or what something is like. This means that you must first recognize whether the predicate is a verb, an い-adjective, a な-adjective, or a noun.

This is an A1 foundation because negative sentences appear immediately in introductions, shopping, schedules, and everyday preferences. You need them to say that you do not drink coffee, that a shop is not open, or that something is not difficult. Japanese often leaves the subject unstated when the context makes it clear, so 行きません can mean “I don’t go,” “he won’t go,” or another contextually understood subject.

There are also two important style choices. Polite style is the useful default with strangers, teachers, colleagues, and people you do not know well. Plain style is common with family and friends and is also the form used inside many longer grammatical structures. Learn the polite forms first, but learn to recognize the plain forms from the start.

How It Works

The beginner map

A verb names an action or state, such as 行く “to go.” An adjective describes a quality, such as 高い “expensive” or 静か “quiet.” A noun names a person, place, thing, or category, such as 学生 “student.” Japanese has two adjective classes, and they form negatives differently.

Category	Affirmative	Polite negative	Plain negative	Meaning
Verb	行きます / 行く	行きません	行かない	do not go / will not go
い-adjective	高いです	高くないです / 高くありません	高くない	is not expensive
な-adjective	静かです	静かじゃないです / 静かではありません	静かじゃない / 静かではない	is not quiet
Noun	学生です	学生じゃないです / 学生ではありません	学生じゃない / 学生ではない	is not a student

The slash in the polite adjective and noun rows shows alternatives, not pieces that must be combined. じゃないです is widely used polite conversation. ではありません sounds more formal. Both are grammatical.

Verbs: ません and ない

If you already know the polite ます-form, replace ます with ません:

Polite affirmative	Polite negative	Meaning
食べます	食べません	eat → do not eat
飲みます	飲みません	drink → do not drink
します	しません	do → do not do
来ます（きます）	来ません（きません）	come → do not come

The non-past tense covers both present habits and future actions. 肉を食べません may mean “I don’t eat meat,” while 明日は行きません means “I won’t go tomorrow.” Time words and context supply the difference.

The plain negative ends in ない. Its formation depends on the verb group:

• Ichidan verbs (often called “る-verbs” in beginner courses): remove final る and add ない: 食べる → 食べない, 見る → 見ない.
• Godan verbs (often called “う-verbs”): change the final kana to its a-row partner and add ない: 書く → 書かない, 話す → 話さない, 飲む → 飲まない. For verbs ending in う, use わない: 買う → 買わない.
• The irregular verbs are する → しない and 来る（くる）→ 来ない（こない）.

Verb group cannot always be guessed from the final sound alone: 帰る “return” is a godan verb, so its negative is 帰らない, not 帰ない. Learn a new verb together with one useful form or its group.

い-adjectives: replace い with くない

For a true い-adjective, remove the final い and add くない:

• 高い → 高くない “not expensive/high”
• 忙しい → 忙しくない “not busy”
• おもしろい → おもしろくない “not interesting”

Add です for normal polite conversation: 高くないです. The alternative 高くありません is also polite and is more formal or careful. Do not put ではありません directly after an い-adjective.

The major beginner exception is いい “good.” Its inflected forms are based on よい, so “not good” is よくない, not いくない.

な-adjectives and nouns: じゃない or ではありません

な-adjectives behave like nouns at the end of a sentence. Remove the affirmative です and choose a negative ending:

• 静かです → 静かじゃないです / 静かではありません
• 便利です → 便利じゃないです / 便利ではありません
• 先生です → 先生じゃないです / 先生ではありません

じゃ is a conversational contraction of では. This gives a useful register scale:

Form	Typical style	Example	Translation
じゃない	plain, conversational	学生じゃない。	I’m not a student.
ではない	plain, more formal/written	学生ではない。	I am not a student.
じゃないです	polite conversation	学生じゃないです。	I’m not a student.
じゃありません	polite conversation	学生じゃありません。	I’m not a student.
ではありません	formal polite	学生ではありません。	I am not a student.

Although じゃありません appears in many beginner materials, じゃないです is extremely common in present-day conversation. Use ではありません in formal announcements, customer service, and careful writing.

Do not add a separate “not”

Japanese negative endings already contain the negative meaning. Compare 行きます “go/will go” with 行きません “do not go/will not go.” There is no extra word to insert before the verb. This is one of the biggest differences from English word order.

Examples in Context

Japanese	English	Note
毎日はコーヒーを飲みません。	I don’t drink coffee every day.	Polite verb negative
明日は学校に行きません。	I won’t go to school tomorrow.	Non-past form with future meaning
今日は働かない。	I’m not working today.	Plain verb negative
肉は食べないです。	I don’t eat meat.	Conversational polite form built from ない
この本は高くないです。	This book isn’t expensive.	い-adjective
テストは難しくありません。	The test is not difficult.	More formal polite い-adjective form
天気はよくないです。	The weather isn’t good.	Irregular いい → よくない
この部屋は静かじゃないです。	This room isn’t quiet.	な-adjective in polite conversation
このホテルは便利ではありません。	This hotel is not convenient.	Formal polite な-adjective
私は学生じゃありません。	I’m not a student.	Polite noun negative
あの人は先生ではない。	That person is not a teacher.	Plain, formal-sounding noun negative
田中さんは家にいません。	Tanaka isn’t at home.	Negative of いる for living things
冷蔵庫に牛乳がありません。	There is no milk in the refrigerator.	Negative of ある for things
日本語はまだ上手じゃないです。	My Japanese isn’t good yet.	まだ often means “not yet” with a negative

English normally requires an explicit subject in these translations. Japanese does not. In a shop, simply saying 買いません can naturally mean “I won’t buy it” because both the speaker and the item are already understood.

Common Mistakes

Adding ない after a polite verb

• Wrong: 行きませんない。
• Right: 行きません。 or 行かない。
• Why: ません and ない are two different negative endings. Choose one style; do not stack them.

Treating every adjective alike

• Wrong: 静かくないです。
• Right: 静かじゃないです。
• Why: 静か is a な-adjective, even though its dictionary form does not visibly end in な. Only い-adjectives form the negative with くない.

Using じゃない directly after an い-adjective

• Wrong: 高いじゃないです。 when you mean “It isn’t expensive.”
• Right: 高くないです。
• Why: A basic negative い-adjective changes い to くない. Be aware that 高いじゃない！ can exist with a different, advanced meaning such as “It is expensive, isn’t it!”; it is not the neutral negative taught here.

Making いい regular

• Wrong: いくないです。
• Right: よくないです。
• Why: いい uses the stem よ- when it changes form: よくない, よかった, and so on.

Putting です after ません

• Wrong: 食べませんです。
• Right: 食べません。
• Why: ます/ません already marks the verb as polite. No final です is needed.

Confusing は with わ in spelling

• Wrong: 学生じゃないでわありません。
• Right: 学生ではありません。
• Why: The particle は is pronounced wa but written は. The contracted form is written じゃ.

Usage Notes

Politeness is a sentence-level choice

Try to keep the end of a simple sentence consistently plain or polite. 行かない is plain; 行きません is polite. In everyday speech, 行かないです is also a common polite negative, but 行きません is the clearest beginner default in formal or neutral situations.

With adjectives and nouns, conversational Japanese commonly uses 高くないです and 学生じゃないです. Formal service language and official statements favor 高くありません and 学生ではありません. “Formal” does not mean “more negative”; the factual meaning stays the same.

は often marks contrast under negation

The particle は can suggest a limited contrast: 魚は食べません may imply “I don’t eat fish (though I may eat other things).” This implication depends on context. At A1, it is enough to notice that particles do not disappear just because a sentence becomes negative.

ない can mean “there is no…”

Existence uses two basic verbs: いる for people and animals, and ある for inanimate things. Their negatives are いない / いません and ない / ありません. Notice that the plain negative of ある is simply ない, not あらない:

• 猫がいません。 “There is no cat.”
• 時間がない。 “There is no time / I have no time.”

Beyond the Basics

You do not need to master all of the following at A1, but these patterns explain forms you will soon encounter.

Past negatives

Negative forms can also be placed in the past. Polite verbs use ませんでした, while plain ない changes like an い-adjective to なかった.

Category	Non-past negative	Past negative	Example meaning
Verb, polite	行きません	行きませんでした	did not go
Verb, plain	行かない	行かなかった	did not go
い-adjective	高くない	高くなかった	was not expensive
な-adjective	静かじゃない	静かじゃなかった	was not quiet
Noun	学生ではない	学生ではなかった	was not a student

Polite descriptive forms include 高くなかったです, 静かじゃなかったです, and the more formal 高くありませんでした, 静かではありませんでした.

ない is more than a sentence ending

The plain negative can modify a noun or connect to later grammar: 食べない人 means “a person who does not eat,” and 行かないでください means “please do not go.” This is why plain forms matter even if you usually speak politely: Japanese subordinate clauses (parts embedded inside a larger sentence) often use them.

Negative questions depend on tone and context

行きませんか literally has negative form but often functions as an invitation: “Won’t you go?” or more naturally, “Would you like to go?” By contrast, 行かないの？ may simply ask “Aren’t you going?” Do not translate negative questions word for word without considering the situation.

じゃない can seek agreement

At the end of a statement, ～じゃない？ can mean “isn’t it?” or “don’t you think?” rather than making the statement negative: きれいじゃない？ can mean “Isn’t it pretty?” Intonation and context distinguish this from きれいじゃない “It isn’t pretty.” This is a useful recognition point, but beginners should first make the basic negative patterns automatic.

Practice Tips

1. Sort before you negate. Make four lists—verbs, い-adjectives, な-adjectives, and nouns—and convert five items from each list. Saying the category aloud prevents errors such as 静かくない.
2. Practice in polite/plain pairs. Say 行きません → 行かない, 高くないです → 高くない, and 学生ではありません → 学生ではない. This builds recognition without mixing endings in one sentence.
3. Use real contrasts. Look around and make true statements: この店は高くないです, 今日は忙しくないです, or コーヒーは飲みません. Then change one sentence into the past negative when you are ready.

Related Concepts

• Prerequisite: Polite Form ます — learn the affirmative ます-form before replacing ます with ません.