Translation guide
Describes a person who is insane, wildly foolish, or extremely passionate. Japanese equivalents range from clinical terms to casual insults, and the best choice depends heavily on context and intent.
To refer to someone who is clinically insane or perceived as mentally unstable.
The most direct translation, meaning 'lunatic' or 'insane person'. It can be used literally or figuratively, but is strong and somewhat dated.
彼はまるで狂人のように叫んでいた。
He was screaming like a madman.
A highly offensive and derogatory term for a madman or lunatic. Avoid using it; it is considered a slur.
This word is extremely offensive and should never be used in polite conversation. It is included only for recognition.
あの気違いがまた騒いでいる。
That madman is causing a ruckus again.
A clinical term for a mentally abnormal person. Used in medical or legal contexts.
その精神異常者は病院に収容された。
The madman was committed to a hospital.
To describe someone acting in a dangerously reckless or extremely foolish manner.
Literally 'reckless person'. A safe and common way to describe someone who acts without regard for danger.
あんな無謀な人に運転を任せられない。
I can't let a madman like that drive.
Means 'one who doesn't know fear of death', a daredevil. Often used with a mix of admiration and criticism.
彼は命知らずのスタントマンだ。
He's a madman of a stuntman.
Literally 'person with a strange head', meaning someone who is crazy or not thinking straight. Casual and common.
こんな嵐の中を外出するなんて、頭がおかしい人だ。
Going out in this storm? What a madman.
To describe someone who is fanatically devoted to a hobby, cause, or activity, often in a positive or semi-admiring way.
A suffix meaning 'fanatic' or 'enthusiast'. Attach to a noun to indicate obsession, e.g., 釣り狂 (fishing fanatic).
彼は釣り狂で、週末はいつも海にいる。
He's a fishing madman; he's always at the sea on weekends.
Loanword from English 'mania', meaning an enthusiast or fanatic. Often used for hobbyists.
Refers to a geek or nerd, often obsessively devoted to anime, manga, games, etc. Can be self-deprecating or derogatory depending on context.
This word is a severe slur and should never be used. Even in historical or literary contexts, it is highly offensive. Use 狂人 or descriptive phrases instead.
To express that someone is a 'madman' about something in a lighthearted way, attach 狂 (きょう) to the object of their obsession. For example, 仕事の狂 (workaholic) or ゲーム狂 (game fanatic). This is very colloquial.
He's a train madman, visiting stations all over the country.
He's an anime madman; his room is full of figurines.