At the A1 level, you don't need to use 'seijō' often. You usually use 'ii' (good) or 'genki' (healthy). However, you might see 'seijō' on your computer or phone screen when everything is working correctly. Think of it as a green light signal. It means 'No problem' or 'OK' in a technical way. You might see it in simple error messages that say 'Normal' vs 'Error.' Focus on recognizing the kanji '正' (correct).
At the A2 level, you can start using 'seijō' to describe things like your body or your tools. If you go to the doctor, you might hear 'Seijō desu' (It's normal). If your computer is working fine, you can say 'Seijō ni ugoite imasu.' It's a more 'adult' and 'professional' way to say things are working than just saying 'daijoubu.' You should learn the opposite word, 'ijō' (abnormal), at this stage too.
At the B1 level, you should use 'seijō' to distinguish between 'average' (futsuu) and 'functioning correctly' (seijō). This is important for business and technical discussions. You should be able to use it as a na-adjective (seijō na jōtai) and an adverb (seijō ni kinō suru). You will encounter this word in news reports about the economy or health. It's a key word for describing systems and processes.
At the B2 level, you should understand the nuance of 'seijō' in abstract contexts, such as 'seijō na handan' (normal/rational judgment). You'll see it in literature or editorials discussing social norms or psychological states. You should also be familiar with related terms like 'seijō-ka' (normalization). You can use it to argue whether a situation is standard or if it has deviated from the expected path.
At the C1 level, you should be comfortable using 'seijō' in specialized fields like medicine, law, or engineering. You understand the legal implications of 'seijō na ishiki' (normal consciousness/sound mind) in contracts or court cases. You can discuss the 'normalization' of political relations or market conditions using the word fluently. You also recognize when 'seijō' is used ironically to critique what society considers 'normal.'
At the C2 level, you have a masterly grasp of 'seijō.' You can use it to discuss complex philosophical concepts of 'normality' versus 'pathology.' You understand its use in high-level academic papers regarding systemic equilibrium. You can distinguish between 'seijō,' 'teikei' (typical), and 'standard' in nuanced ways. You are sensitive to how the definition of 'seijō' changes across different historical and cultural contexts in Japanese society.

正常な en 30 secondes

  • Means 'normal' or 'functioning correctly.'
  • Used for machines, health, and systems.
  • Formal/Technical nuance compared to 'futsuu.'
  • Opposite of 'ijō' (abnormal).

The Japanese word 正常な (せいじょうな - seijō na) is a formal and technical na-adjective that translates to 'normal,' 'regular,' or 'healthy.' Unlike the more casual word 普通 (futsuu), which describes things that are common or average, 正常 specifically refers to a state that conforms to a standard, a rule, or a functional requirement. It is the opposite of 異常 (ijō), which means 'abnormal' or 'faulty.'

Technical Normality
Used when describing machines, software, or biological systems functioning exactly as they were designed to.
Medical Context
Used for test results, heart rates, or mental states that fall within the expected healthy range.
Logical Soundness
Refers to a person's ability to make rational, 'normal' judgments under pressure.

機械は正常な状態で動いています。(The machine is operating in a normal state.)

— Example of mechanical status

検査の結果、心拍数は正常な範囲内でした。(As a result of the test, the heart rate was within the normal range.)

彼は正常な判断ができる状態ではない。(He is not in a state where he can make a normal/rational judgment.)

このプログラムは正常な動作を保証しません。(This program does not guarantee normal operation.)

社会の正常な発展を願っています。(I hope for the normal development of society.)

Common Collocations
正常な動作 (Normal operation), 正常な数値 (Normal numerical value), 正常な反応 (Normal reaction).

Since 正常 is a na-adjective, it follows standard grammatical rules for that category. You will most often see it followed by the particle when modifying a noun, or when used as an adverb to describe how something is functioning.

  • As an Adjective: [Noun] + は + 正常だ (The [Noun] is normal). Example: 血圧は正常だ (Blood pressure is normal).
  • Modifying a Noun: 正常な + [Noun]. Example: 正常なプロセス (A normal process).
  • As an Adverb: 正常に + [Verb]. Example: 正常に作動する (To operate normally).

In technical documentation, you will frequently see the phrase 正常終了 (Seijō Shūryō), which means 'Successful completion' or 'Normal termination' of a computer process. Conversely, an error is an 異常終了.

システムが正常に起動しました。(The system started up normally.)

When talking about people, 正常 is used for their physical or mental health status. However, be careful: calling someone's personality 'normal' using 正常 can sound overly clinical, like you are a psychiatrist evaluating them. For everyday social 'normality,' 普通 (futsuu) is much more common.

You will encounter 正常な in several specific environments:

1. Medical Settings

Doctors and nurses use this word constantly. When you get your blood work back, the report will list the 'Normal Range' as 正常値 (seijō-chi). If your heart sounds fine, they might say it's 正常な音 (seijō na oto).

2. IT and Engineering

This is perhaps the most common place for learners to see the word. Error messages, status reports, and logs will use 正常 to indicate that there are no bugs or hardware failures. If your Wi-Fi is working, the status might be 正常.

3. News and Formal Reports

When discussing the economy or international relations, commentators might talk about the 正常化 (seijō-ka)—the 'normalization'—of relations between two countries or the return of the market to a 正常な状態 after a crisis.

The most frequent mistake is confusing 正常 (seijō) with 普通 (futsuu).

Mistake: Using 'Seijō' for 'Common'
If you want to say 'I am a normal student,' saying 私は正常な学生です sounds like you are saying 'I am a student who is not medically insane or physically broken.' Use 普通の学生 instead.
Mistake: Forgetting the 'Na'
Because it ends in 'jou,' some learners treat it like a noun only. Remember: 正常な動作, not 正常動作 (though the latter is used in compound technical nouns).

Another mistake is using it to mean 'correct' in a moral sense. While means 'correct,' 正常 is about 'functioning.' If you want to say 'That is the right answer,' use 正しい (tadashii), not 正常な.

Understanding the synonyms helps define the boundaries of 正常:

  • 普通 (Futsuu): General 'ordinary' or 'average.' Used for social norms and everyday items.
  • 一般的 (Ippanteki): 'General' or 'Typical.' Used for trends or common opinions.
  • 健全 (Kenzen): 'Wholesome' or 'Healthy.' Often used for a 'sound' mind or a 'healthy' economy.
  • 正規 (Seiki): 'Regular' or 'Formal.' Used for 'regular employees' (正規雇用) or 'official' channels.

While 正常 is 'functioning as intended,' 健全 is 'robust and healthy,' and 普通 is just 'what most people do.'

How Formal Is It?

Niveau de difficulté

Grammaire à connaître

Na-adjective noun modification

Adverbial '~ni' formation

Negative '~de wa nai'

Potential form of verbs (often used with 'seijō ni')

State of being '~da/desu'

Exemples par niveau

1

このカメラは正常です。

This camera is normal (working fine).

Simple [Noun] + desu structure.

2

正常なボタンを押してください。

Please press the normal button.

Na-adjective modifying a noun.

3

体温は正常です。

Body temperature is normal.

Medical context.

4

正常な音を聞きます。

I hear a normal sound.

Describing a sensory input.

5

アプリは正常に動いています。

The app is moving (working) normally.

Adverbial use with 'ni'.

6

正常な色は何ですか?

What is the normal color?

Asking for a standard.

7

心臓は正常ですか?

Is the heart normal?

Question form.

8

はい、正常です。

Yes, it is normal.

Short affirmative response.

1

機械が正常に作動しています。

The machine is operating normally.

Using the verb 'sadou' (operate).

2

正常な数値に戻りました。

It returned to a normal numerical value.

Using 'modoru' (return).

3

彼の血圧は正常な範囲です。

His blood pressure is in the normal range.

Using 'hani' (range).

4

正常な生活を送りたいです。

I want to lead a normal life.

Using 'seikatsu o okuru' (lead a life).

5

データは正常に保存されました。

The data was saved normally.

Passive voice 'hozon sareta'.

6

正常な判断ができませんでした。

I couldn't make a normal judgment.

Negative potential form.

7

エンジンは正常な音を立てている。

The engine is making a normal sound.

Using 'oto o tateru' (make a sound).

8

正常な状態を確認してください。

Please confirm the normal state.

Using 'kakunin' (confirm).

1

システムを正常な状態に復旧させる。

Restore the system to a normal state.

Using 'fukkyū' (restore).

2

正常な取引が行われました。

A normal transaction took place.

Using 'torihiki' (transaction).

3

彼は正常な精神状態ではないようだ。

It seems he is not in a normal mental state.

Using 'seishin jōtai' (mental state).

4

正常な細胞とがん細胞を比較する。

Compare normal cells and cancer cells.

Using 'hikaku' (compare).

5

プログラムが正常終了したことを確認した。

Confirmed that the program terminated normally.

Compound noun 'seijō shūryō'.

6

正常な競争は市場に必要だ。

Normal competition is necessary for the market.

Using 'kyōsō' (competition).

7

この薬は正常な血流を助けます。

This medicine helps normal blood flow.

Using 'ketsuryū' (blood flow).

8

正常な機能を維持するために運動する。

Exercise to maintain normal functions.

Using 'iji' (maintain).

1

両国間の外交関係が正常化した。

Diplomatic relations between the two countries normalized.

Using 'seijō-ka' (normalization).

2

正常な社会の発展には教育が不可欠だ。

Education is indispensable for the normal development of society.

Using 'fukaketsu' (indispensable).

3

彼は極限状態で正常な判断力を失った。

He lost his normal judgment in an extreme situation.

Using 'kyokugen jōtai' (extreme state).

4

正常なルートで商品を仕入れる。

Procure products through normal (official) routes.

Using 'shiireru' (procure).

5

景気が正常な軌道に戻りつつある。

The economy is returning to a normal track.

Using 'kidō' (track/orbit).

6

正常な神経の持ち主ならそんなことはしない。

Anyone with a normal set of nerves wouldn't do that.

Idiomatic expression for 'sane person'.

7

胎児の正常な発育を確認する。

Confirm the normal growth of the fetus.

Using 'hatsuiku' (growth/development).

8

正常な手続きを経て申請してください。

Please apply through the normal procedures.

Using 'tetsuzuki' (procedure).

1

法治国家としての正常な機能を果たす。

Fulfill the normal functions of a constitutional state.

Formal political language.

2

市場の正常な価格形成を妨げる行為だ。

It is an act that hinders the normal price formation of the market.

Economic/Legal context.

3

正常な細胞組織に影響を与えずに治療する。

Treat without affecting normal cell tissue.

Advanced medical context.

4

民主主義が正常に機能しているとは言い難い。

It is hard to say that democracy is functioning normally.

Using 'ii-gatai' (hard to say).

5

正常な倫理観を疑わざるを得ない。

I cannot help but doubt their normal sense of ethics.

Using 'zaru o enai' (cannot help but).

6

通信網の正常な運用を確保する。

Ensure the normal operation of the communication network.

Using 'un'yō' (operation/management).

7

正常な思考回路を遮断するほどの恐怖。

Fear so great it shuts down normal thought processes.

Literary/Psychological context.

8

正常な代謝を促すための食事療法。

Dietary therapy to promote normal metabolism.

Using 'taisha' (metabolism).

1

「正常」という概念自体が社会的に構築されたものだ。

The concept of 'normality' itself is socially constructed.

Philosophical discussion.

2

システムの正常性を担保するための多重化設計。

Redundant design to guarantee the normality (integrity) of the system.

Using 'seijō-sei' (normality/integrity).

3

正常な言説が封じ込められるディストピア。

A dystopia where normal discourse is suppressed.

Literary/Political context.

4

生体恒常性が正常な範囲を逸脱している。

Homeostasis has deviated from the normal range.

High-level biological terminology.

5

正常な市場原理が働かない特殊な状況。

A special situation where normal market principles do not work.

Economic theory.

6

正常な人間関係の構築を阻害する要因。

Factors that hinder the construction of normal human relationships.

Sociological context.

7

正常な精神の均衡を保つのが難しい時代だ。

It is an era where it is difficult to maintain a normal mental balance.

Using 'kinkō' (balance/equilibrium).

8

正常な手続きの瑕疵を指摘する。

Point out a flaw in the normal procedure.

Using 'kashi' (legal flaw/defect).

Collocations courantes

正常な動作 (Normal operation)
正常な数値 (Normal value)
正常な判断 (Normal judgment)
正常な反応 (Normal reaction)
正常な範囲 (Normal range)
正常な細胞 (Normal cell)
正常な発達 (Normal development)
正常な状態 (Normal state)
正常に機能する (Function normally)
正常に終了する (Terminate normally)

Souvent confondu avec

正常な vs 普通 (Futsuu)

Futsuu is 'common/average'; Seijō is 'functioning correctly/healthy.'

正常な vs 正しい (Tadashii)

Tadashii is 'factually/morally correct'; Seijō is 'operationally normal.'

正常な vs 健全 (Kenzen)

Kenzen is 'wholesome/robust'; Seijō is 'standard/non-pathological.'

Facile à confondre

正常な vs

正常な vs

正常な vs

正常な vs

正常な vs

Structures de phrases

[Noun]は正常です。

正常な[Noun]を[Verb]。

[Noun]が正常に[Verb]。

正常な範囲は[Value]です。

正常に戻る。

正常に終了しました。

正常な判断を下す。

正常な発達を遂げる。

Comment l'utiliser

antonym usage

Always pair with 'ijō' in your mind.

technical vs social

Seijō is functional; Futsuu is social.

Erreurs courantes
  • Confusing with 'futsuu' (common).
  • Using 'seijō' for moral correctness.
  • Forgetting the 'na' in 'seijō na'.
  • Using it for 'correct answer' (tadashii kotae).
  • Mispronouncing the long 'o' in 'jō'.

Astuces

Adverbial Use

Remember to use 'ni' when describing how something works: 'Seijō ni ugoite iru.'

Pair with Ijō

Learn 'Seijō' and 'Ijō' together as a set of opposites for systems.

Medical Reports

Look for '正常値' (seijō-chi) on your health check results to see if you are healthy.

Error Logs

If you see '正常' in a log, it means everything is fine. No action needed.

Avoid Overuse

Don't use 'seijō' to mean 'okay' in social situations; stick to 'daijoubu'.

Writing Tip

The 'sei' in 'seijō' is the same as in 'tadashii' (correct).

Clinical Feel

Be aware that 'seijō' has a slightly cold, scientific feel to it.

News Keywords

Listen for 'seijō-ka' when the news discusses international diplomacy.

Compound Nouns

In technical manuals, 'na' is often dropped in compounds like '正常動作'.

Checkmark

Visualize a green checkmark whenever you hear 'seijō'.

Mémorise-le

Origine du mot

Sino-Japanese (Kango)

Contexte culturel

Calling a person 'seijō' can sound like a clinical diagnosis. Use 'matomo' or 'futsuu' for personality.

Use 'seijō' when reporting technical status to a boss. 'Futsuu' is too casual.

Pratique dans la vie réelle

Contextes réels

Amorces de conversation

"検査の結果は正常でしたか? (Were your test results normal?)"

"パソコンが正常に動かなくて困っています。 (I'm in trouble because my PC isn't working normally.)"

"何が「正常な」社会だと思いますか? (What do you think is a 'normal' society?)"

"この数値は正常な範囲内ですか? (Is this value within the normal range?)"

"正常な判断をするために必要なことは何ですか? (What is necessary to make a normal judgment?)"

Sujets d'écriture

Describe a time when you couldn't make a 'seijō na handan' (normal judgment).

Write about the importance of 'seijō na seikatsu' (a normal life) after a busy week.

Discuss whether technology always functions 'seijō ni' (normally) in your experience.

What does 'seijō na jōtai' (a normal state) mean for your mental health?

Reflect on the 'normalization' (seijō-ka) of a relationship in your life.

Questions fréquentes

10 questions

Yes, but only for their health or mental state. For their personality, use 'futsuu' or 'matomo'.

It is a noun that functions as a na-adjective. You use 'seijō na' to modify nouns.

The most direct opposite is '異常' (ijō), meaning abnormal or faulty.

Yes, it is more formal and technical than 'futsuu' or 'daijoubu'.

You say '正常化する' (seijō-ka suru).

It sounds like you are saying 'a person who is not medically ill.' It's a bit clinical.

It means the program finished successfully without errors.

It is 'Heiban' (flat), so try not to stress any specific syllable.

Only in the sense of 'correct functioning,' not 'the correct answer' on a test.

Mainly when talking about health, machines, or news. Not for casual gossip.

Teste-toi 79 questions

/ 79 correct

Perfect score!

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