Translation guide
A person with deep knowledge or skill in a particular area. In Japanese, the most common equivalent is 専門家 (senmonka), but other terms like スペシャリスト (supesharisuto) or 専門医 (senmon'i) for medical specialists are used depending on context.
Referring to someone with specialized knowledge or expertise in any professional or academic area.
The most common and neutral term for a specialist or expert. Used in formal and informal contexts.
彼はITの専門家です。
He is an IT specialist.
専門家の意見を聞きましょう。
Let's ask a specialist's opinion.
Loanword from English, often used in business or technical contexts. Slightly more casual than 専門家.
彼女はマーケティングのスペシャリストだ。
She is a marketing specialist.
Another loanword, emphasizing high-level expertise. Often used in professional settings.
彼はサイバーセキュリティのエキスパートとして知られている。
He is known as a cybersecurity expert.
A doctor who specializes in a particular branch of medicine.
Specifically refers to a medical specialist. Commonly used in healthcare contexts.
皮膚科の専門医に診てもらった。
I saw a dermatology specialist.
専門医の紹介状が必要です。
You need a referral to a specialist.
Emphasizing narrow focus or specialization, often in contrast to a generalist.
Works in this contrastive sense as well.
ゼネラリストより専門家の方が求められる時代だ。
It's an era where specialists are more in demand than generalists.
Used as a prefix or adjective meaning 'specialized type'. Often in business or tech.
特化型の人材を育成する。
We develop specialized personnel.
専門家 is the safest, most neutral choice. スペシャリスト is a loanword often used in business or casual talk. エキスパート implies top-level expertise and is common in formal or written contexts.
Can also be used for medical specialists, but 専門医 is more precise.
彼は心臓のスペシャリストです。
He is a heart specialist.