At the A1 level, you can think of '専門家' (specialist) as a job title. Just like 'doctor' or 'teacher', it is a person who knows a lot about one thing. You might see it in simple introductions. Example: 'He is a computer specialist.' It is a bit difficult for A1, but useful for describing people's roles in a simple way. Focus on the 'person' (家) part of the word.
At the A2 level, you start to use '専門家' with the particle 'の' to describe what kind of expert someone is. For example, '料理の専門家' (cooking specialist). You can use it to talk about people you see on TV or in books. You should understand that this person is an 'expert' and their advice is important. It is more formal than just saying 'someone who is good at something'.
At the B1 level, you should be able to use '専門家' in discussions about problems or advice. You can say things like 'We should ask a specialist' (専門家に聞きましょう). You understand that a 専門家 has formal training. You can also distinguish it from 'プロ' (pro), knowing that 専門家 is often used for academic or technical fields like science, law, or history.
At the B2 level, you use '専門家' to discuss complex social issues. You can use phrases like '専門家によると' (According to experts...) to back up your arguments in essays or debates. You understand the nuance of '専門家としての意見' (an opinion from the standpoint of an expert). You are comfortable seeing this word in news articles and can identify the specific field of expertise mentioned before the word.
At the C1 level, you recognize the subtle differences between '専門家', '有識者' (knowledgeable person), and '権威' (authority). You can use '専門家' in professional reports and academic writing. You understand the societal role of experts in Japan, such as their involvement in 'shingikai' (government councils). You can also use the word ironically or critically when discussing 'so-called experts'.
At the C2 level, you have a complete grasp of the word's connotations, including its etymological roots and its role in the 'expert vs. layman' (専門家と素人) dichotomy in philosophy or sociology. You can use it fluently in high-level discourse, understanding how the term confers legitimacy and power within Japanese institutional structures. You can navigate complex texts where the definition of 'expertise' itself is being questioned.

専門家 in 30 Sekunden

  • A person with deep, specialized knowledge in a specific field.
  • Used in formal, academic, and professional contexts.
  • Implies authority and years of dedicated study or practice.
  • Commonly paired with 'の' to specify the field (e.g., ITの専門家).

The term 専門家 (Senmonka) is a cornerstone of Japanese professional and academic vocabulary. At its core, it refers to an individual who possesses a deep, concentrated level of knowledge or skill in a specific niche. Unlike a generalist, a 専門家 has dedicated significant time to mastering the intricacies of a particular 'gate' (門) of knowledge. The word is composed of three kanji: (exclusive/specialty), (gate/field), and (person/professional/house). Together, they evoke the image of someone who has entered a specific gate and made it their home.

Etymological Depth
The 'Ka' (家) suffix is particularly important; it is the same 'ka' found in 'Artist' (芸術家) or 'Writer' (作家), implying that the expertise is not just a job, but a defining characteristic of the person's identity.
Scope of Expertise
A 専門家 can be found in any field—from high-level quantum physics to the specific craft of traditional tea ceremony. It implies a level of authority that commands respect in formal settings.

「この問題については、専門家の意見を聞く必要があります。」

— Translation: Regarding this issue, we need to hear the opinion of a specialist.

In contemporary Japan, the word is frequently used in news broadcasts, where 'senmonka' are invited to provide commentary on complex social issues, medical breakthroughs, or economic shifts. This role as a 'public intellectual' or 'technical authority' is central to the word's modern identity.

1

Academic Context

In universities, a 専門家 is someone who has published extensive research and is recognized by their peers as a leading voice.

2

Legal/Medical Context

When legal or medical disputes arise, a 専門家 is called as an expert witness to provide objective, technical testimony.

Using 専門家 correctly requires understanding its grammatical placement and the level of formality it carries. It is a noun that can function as a subject, object, or modifier using the particle 'の'.

As a Modifier (Noun + の + 専門家)
ITの専門家 (IT specialist), 法律の専門家 (Legal expert), 料理の専門家 (Culinary expert).
With Verbs of Consultation
専門家に相談する (Consult a specialist), 専門家に依頼する (Request a specialist's help).

One of the most common sentence patterns involves seeking an 'expert opinion' (専門家の意見). This is a standard phrase in business and academic writing. When you want to emphasize that someone is acting in the capacity of an expert, you use the 'として' structure.

「彼は経済の専門家として政府に助言している。」

(He is advising the government as an economic specialist.)

It is also important to note that 専門家 is a neutral to formal term. While you can use it to describe yourself in a resume, in humble conversation, you might use more specific job titles or phrases like 'まだまだ勉強中ですが' (I am still studying, but...) to avoid sounding overly boastful, even if you are indeed an expert.

You will encounter 専門家 in environments where technical precision and authoritative knowledge are valued. It is a 'high-frequency' word in formal media and professional discourse.

  • News Media: TV news programs often feature a '専門家パネル' (expert panel) to discuss topics like climate change, pandemics, or international relations.
  • Corporate Settings: During strategy meetings, a manager might say, 'We need a 専門家 for this specific technical hurdle.'
  • Educational Institutions: Professors are often introduced as '〇〇分野の専門家' (a specialist in the field of 〇〇).
  • Documentaries: Narrators use the word to introduce the people they are interviewing.

Learners often confuse 専門家 with other words that mean 'professional' or 'skilled person'. Understanding these distinctions is key to reaching B2/C1 proficiency.

Mistake 1: Using 'Pro' (プロ) for Academic Experts
'プロ' usually refers to someone who makes a living from a skill (like a pro golfer or pro gamer). You wouldn't usually call a theoretical physicist a 'プロ' in a formal context; '専門家' is the correct term for academic or technical authority.
Mistake 2: Confusing with 'Tokui' (得意)
'Tokui' means you are good at something. You can be 'tokui' at cooking without being a '料理の専門家' (culinary specialist). 'Senmonka' implies formal study and recognized status.

❌ Incorrect:

「彼はテニスの専門家です。」 (He is a tennis specialist - sounds like he studies the physics of tennis.)

✅ Correct:

「彼はプロのテニス選手です。」 (He is a professional tennis player.)

Japanese has a rich vocabulary for 'experts'. Here is how 専門家 compares to its synonyms:

エキスパート (Expert)

Often used in business and tech. It sounds slightly more modern and 'skill-oriented' than the traditional 専門家.

有識者 (Yushikisha)

Literally 'person who has knowledge'. Used for 'knowledgeable persons' or 'intellectuals' invited to government committees.

スペシャリスト (Specialist)

Katana version. Often used in HR and job descriptions to distinguish from 'Generalists'.

権威 (Ken'i)

Meaning 'Authority'. This is the highest level of 専門家—someone who is the leading figure in the entire field.

How Formal Is It?

Schwierigkeitsgrad

Wichtige Grammatik

〜としての (as a...)

〜によると (according to...)

〜ならではの (unique to...)

〜によって (by/depending on...)

〜に関する (regarding...)

Beispiele nach Niveau

1

彼はコンピュータの専門家です。

He is a computer specialist.

Noun + の + 専門家

2

専門家に会いに行きます。

I am going to meet a specialist.

Directional particle に

3

あの人は専門家ですか?

Is that person a specialist?

Question marker か

4

私の父は魚の専門家です。

My father is a fish specialist.

Possessive particle の

5

専門家の本を読みます。

I read a specialist's book.

Object particle を

6

ここに専門家がいます。

There is a specialist here.

Existence verb います

7

専門家はだれですか?

Who is the specialist?

Interrogative だれ

8

専門家の話は面白いです。

The specialist's talk is interesting.

Adjective 面白い

1

料理の専門家に作り方を習いました。

I learned how to cook from a cooking specialist.

Particle に (from/to)

2

専門家の意見を聞きたいです。

I want to hear the specialist's opinion.

Desire form 〜たい

3

彼は有名な歴史の専門家です。

He is a famous history specialist.

Adjective 有名な

4

この問題は専門家でも難しいです。

This problem is difficult even for a specialist.

Particle でも (even)

5

専門家に電話をしてください。

Please call a specialist.

Request form 〜てください

6

彼女は花の専門家として働いています。

She is working as a flower specialist.

Role marker として

7

専門家のチームが調査を始めました。

A team of specialists started the investigation.

Compound noun 専門家のチーム

8

もっと専門家の知識が必要です。

More specialist knowledge is needed.

Noun 知識 (knowledge)

1

専門家の助言のおかげで、成功しました。

Thanks to the specialist's advice, we succeeded.

〜のおかげで (thanks to)

2

どの専門家に相談すればいいですか?

Which specialist should I consult?

〜ばいいですか (should I...)

3

専門家によって意見が分かれています。

Opinions are divided depending on the specialist.

〜によって (depending on)

4

彼はその分野の専門家として知られています。

He is known as a specialist in that field.

Passive voice 知られている

5

専門家の視点から見ると、これは危険です。

From a specialist's perspective, this is dangerous.

〜の視点から (from the perspective of)

6

政府は専門家会議を開くことにした。

The government decided to hold an expert meeting.

〜ことにした (decided to)

7

素人が専門家に勝つのは難しい。

It is difficult for an amateur to beat a specialist.

Noun nominalizer のは

8

専門家ならではの鋭い指摘ですね。

That's a sharp observation unique to a specialist.

〜ならではの (unique to)

1

専門家の分析によると、景気は回復傾向にある。

According to the specialist's analysis, the economy is on a recovery trend.

〜によると (according to)

2

彼女は環境問題の専門家として、世界中で講演している。

As an environmental specialist, she gives lectures all over the world.

Gerund 講演している

3

専門家の間でも、この説は支持されている。

Even among specialists, this theory is supported.

〜の間でも (even among)

4

単なる知識だけでなく、専門家としての経験が求められる。

Not just simple knowledge, but experience as a specialist is required.

〜だけでなく (not only...)

5

専門家に依頼して、鑑定を行ってもらった。

We requested a specialist to perform an appraisal.

Causative-benefactive 〜てもらった

6

この論文は、専門家以外の人が読んでも理解しにくい。

This paper is hard to understand even for non-specialists.

〜にくい (hard to do)

7

専門家を招いて、社内研修を実施した。

We invited a specialist and conducted in-house training.

招いて (inviting)

8

彼はITセキュリティの専門家として、第一線で活躍している。

He is active on the front lines as an IT security specialist.

第一線で活躍 (active on the front lines)

1

専門家の知見を政策に反映させることが不可欠だ。

It is essential to reflect the expertise of specialists in policy.

Reflect (反映させる)

2

その道の専門家であっても、判断を誤ることがある。

Even for a specialist in that field, errors in judgment can occur.

〜であっても (even if)

3

専門家による査読を経て、論文が掲載された。

After peer review by specialists, the paper was published.

査読 (peer review)

4

彼は単なる専門家にとどまらず、社会活動家としての顔も持つ。

He is not just a specialist; he also has a side as a social activist.

〜にとどまらず (not limited to)

5

専門家が警鐘を鳴らしているにもかかわらず、対策が遅れている。

Despite specialists sounding the alarm, countermeasures are lagging.

警鐘を鳴らす (sound the alarm)

6

専門家集団としての倫理観が問われている。

The sense of ethics as a group of specialists is being questioned.

〜が問われている (is being questioned)

7

多角的な視点を持つため、複数の専門家から意見を徴収した。

To have a multifaceted perspective, we collected opinions from multiple specialists.

徴収 (collect/levy)

8

専門家の言説が、世論の形成に大きな影響を及ぼしている。

The discourse of specialists is exerting a great influence on the formation of public opinion.

及ぼしている (exerting/causing)

1

専門家という呼称が、時として思考停止を招く危惧がある。

There is a fear that the label 'specialist' sometimes leads to a cessation of critical thinking.

思考停止 (cessation of thought)

2

学際的なアプローチは、既存の専門家の枠組みを打破する。

An interdisciplinary approach breaks down the existing frameworks of specialists.

枠組みを打破する (break down frameworks)

3

専門家の知の独占が、民主主義的な意思決定を阻害してはならない。

The monopoly of knowledge by specialists must not hinder democratic decision-making.

知の独占 (monopoly of knowledge)

4

彼は、その難解な古文書を解読できる唯一の専門家と目されている。

He is regarded as the only specialist capable of deciphering those esoteric ancient texts.

〜と目されている (is regarded as)

5

専門家が提示するエビデンスの妥当性を、批判的に検証する必要がある。

It is necessary to critically verify the validity of the evidence presented by specialists.

妥当性 (validity)

6

現代社会における専門家の役割は、単なる知識の提供から、リスクの管理へと変容している。

The role of specialists in modern society is transforming from mere knowledge provision to risk management.

変容 (transformation)

7

専門家の言説に内在するバイアスを看破するのは容易ではない。

It is not easy to see through the biases inherent in the discourse of specialists.

看破する (see through)

8

専門家としての矜持にかけて、このプロジェクトを完遂させる。

I will complete this project, staking my pride as a specialist.

矜持にかけて (staking one's pride)

Häufige Kollokationen

専門家の意見
専門家に相談する
専門家の助言
専門家会議
専門家の視点
専門家としての誇り
専門家の分析
専門家の知識
専門家に依頼する
専門家を招く

Häufige Phrasen

専門家によると
専門家の間では
その道の専門家
自称専門家
専門家派遣
専門家集団
専門家委員会
専門家レベル
専門家ならでは
専門家気取り

Wird oft verwechselt mit

専門家 vs プロ

Pro implies making money; Senmonka implies having deep knowledge.

専門家 vs 達人

Tatsujin implies mastery of a physical skill or hobby; Senmonka is more academic/technical.

専門家 vs オタク

Otaku implies obsessive interest; Senmonka implies recognized expertise.

Leicht verwechselbar

専門家 vs

専門家 vs

専門家 vs

Satzmuster

Wortfamilie

Verwandt

専門学校 (Vocational school)
専門用語 (Terminology)
専門分野 (Field of expertise)
専門職 (Professional occupation)

So verwendest du es

Scope

Can be used for hobbies if the person is extremely knowledgeable, but usually implies professional status.

Nuance

It sounds more objective and technical than 'Expert' (エキスパート).

Häufige Fehler
  • Using 専門家 for a professional athlete (use プロ instead).
  • Forgetting the particle 'の' between the field and the word.
  • Using it for someone who is just 'good' at a hobby (use 達人 or 上手 instead).
  • Mispronouncing the 'ka' as 'ga'.
  • Writing the kanji 専 with an extra stroke.

Tipps

Kanji Practice

Practice writing 専, 門, and 家 together. Notice how 門 looks like a gate.

Word Building

Learn '専門' first, then add '家' to see how many professions use this suffix.

Watch News

Watch Japanese news and count how many times they introduce someone as a 専門家.

Context Matters

Use 専門家 for science and law; use 職人 (shokunin) for traditional crafts.

Particles

Always remember the 'の' when connecting a field to 専門家.

Politeness

When talking to an expert, use their title (e.g., Sensei) rather than calling them 'Senmonka' to their face.

Formal Reports

In reports, use '専門家の知見' to sound more professional than '専門家の意見'.

Academic Papers

Look for this word in the 'Acknowledgements' section of Japanese papers.

Podcasts

Listen for interview introductions; they almost always use this word.

The House of Knowledge

Think of the 'Ka' as a house where the expert lives with all their books.

Einprägen

Wortherkunft

Derived from classical Chinese roots where 'Ka' (家) denotes a master of a craft or school of thought.

Kultureller Kontext

The Japanese government frequently uses 'Senmonka Kaigi' (Expert Meetings) to justify policy decisions.

Many 'Senmonka' become celebrities (tarento) in Japan by appearing on variety shows.

Im Alltag üben

Kontexte aus dem Alltag

Gesprächseinstiege

"この分野の専門家を知っていますか?"

"専門家の意見を聞くべきだと思いますか?"

"あなたは何の専門家になりたいですか?"

"最近、テレビで面白い専門家を見ましたか?"

"専門家になるために一番大切なことは何ですか?"

Tagebuch-Impulse

自分が何の専門家になれるか書いてみましょう。

専門家の意見が間違っていた経験について書いてください。

なぜ社会には専門家が必要なのか、あなたの考えを述べてください。

Häufig gestellte Fragen

10 Fragen

Yes, but it sounds more humble to say '〇〇を専門にしています' (I specialize in 〇〇).

They are mostly interchangeable, but 専門家 is more common in general Japanese, while スペシャリスト is common in HR/business.

It is a neutral, formal word. To be more polite, add 'の方' (no kata).

Usually, we use 'プロ' or '選手' for sports. '専門家' might refer to a sports scientist.

You can use '素人' (shirouto) or '非専門家' (hi-senmonka).

Yes, '専門医' (senmon-i) is specifically a medical specialist.

It is '自称専門家' (jishou senmonka).

Only metaphorically, e.g., '遊びの専門家' (an expert at playing).

Japanese doesn't have plural forms, but you can say '専門家たち' or '専門家グループ'.

It is called 'エキスパートシステム'.

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