Translation guide
Describes the ability to think and respond rapidly, often with cleverness or humor. In Japanese, this concept is expressed through adjectives, verbs, and idiomatic phrases that emphasize mental agility, sharpness, and the ability to react appropriately in conversation or situations.
彼は頭の回転が速い。
He is quick-witted.
彼女は機転が利く。
She is quick-witted.
Describing a person who is naturally quick to understand, clever, and able to respond rapidly in conversation or problem-solving.
Literally 'head's rotation is fast,' this is the most common and natural way to say someone is quick-witted. It emphasizes mental processing speed.
彼は頭の回転が速いから、どんな質問にもすぐ答えられる。
He's quick-witted, so he can answer any question right away.
Means to be resourceful and quick-thinking, especially in handling unexpected situations. '機転' refers to wit or quick thinking, and '利く' means to function effectively.
彼女は機転が利くので、トラブルにも冷静に対処できる。
She's quick-witted, so she can handle trouble calmly.
Means 'sharp' or 'clear-headed.' Often used to describe someone whose mind is particularly alert or brilliant at a given moment.
今日は頭が冴えていて、仕事がはかどる。
I'm sharp today, so work is going smoothly.
General term for 'smart' or 'intelligent.' While broader than quick-witted, it often implies quick understanding in context.
あの子は本当に頭がいいね。
That kid is really smart.
Means 'sharp' or 'keen,' often used for perceptive or incisive thinking. Can describe a person or their remarks.
彼の鋭い指摘にみんな驚いた。
Everyone was surprised by his sharp observation.
Describing someone who can make quick, witty remarks or comebacks, often with humor.
Directly borrowed from English 'wit,' this phrase means 'full of wit.' It's commonly used for someone who is cleverly humorous.
彼のスピーチはいつもウィットに富んでいる。
His speeches are always full of wit.
Means to be good at making witty remarks or jokes. '洒落' refers to jokes or puns.
彼は洒落が利くから、会話が楽しい。
He's quick with a witty remark, so conversations are fun.
Literally 'mouth is skillful,' this can mean smooth-talking or glib, but in some contexts implies witty repartee. Use with caution as it can have negative connotations of being slick.
Can imply being glib or insincere; not always positive.
Describing the ability to react quickly and appropriately in unexpected or challenging situations.
Means 'able to make instant judgments.' Emphasizes quick decision-making in the moment.
彼はとっさの判断ができるから、緊急時に頼りになる。
He can think on his feet, so he's reliable in emergencies.
A set phrase meaning 'able to adapt to circumstances flexibly.' It's a formal way to describe resourcefulness and quick thinking.
彼女は臨機応変に対応できるので、どんな仕事でもうまくいく。
She can adapt to any situation, so she does well in any job.
As above, this also fits here for quick thinking in a pinch.
Both mean quick-witted, but 頭の回転が速い focuses on raw mental speed and intelligence, while 機転が利く emphasizes practical cleverness and resourcefulness in real situations.
彼は頭の回転が速いが、機転が利くとは限らない。
He's quick-minded, but not necessarily resourceful.
The English phrase 'quick-witted' does not have a single direct equivalent. Avoid translating word-for-word as '早い機知' or similar, which sounds unnatural. Use the idiomatic expressions provided.
この仕事では頭の回転の速さが必要だ。
You need to be quick-witted in this job.
彼女の機転の利いた返答で会議が救われた。
Her quick-witted response saved the meeting.
彼は口がうまいから、言いくるめられそうになる。
He's so quick-witted with words that I almost get talked into things.
Thanks to quick thinking, we avoided danger.