Translation guide
How to express 'ad-lib' in Japanese, covering improvisation in speech, performance, and music.
To speak or perform without preparation, making it up on the spot.
The most direct and common way to say 'speak ad-lib'. Uses the loanword アドリブ.
彼はスピーチをアドリブで話した。
He gave the speech ad-lib.
A more formal or literary way to say 'speak impromptu'. 即興 means improvisation.
彼女は即興で素晴らしいスピーチをした。
She gave a wonderful impromptu speech.
The loanword used as a noun, meaning an ad-libbed line or action. Very common in entertainment contexts.
その俳優はアドリブが上手い。
That actor is good at ad-libbing.
Means doing something without rehearsal, 'winging it'. Casual and often used for performances or presentations.
練習なしでぶっつけ本番でやった。
We did it without rehearsal, just ad-libbed.
To create or perform music spontaneously, without a fixed score.
Standard way to say 'play ad-lib' in music. アドリブ is widely understood.
ジャズではよくアドリブで演奏する。
In jazz, they often play ad-lib.
More formal term for musical improvisation. Often used in classical or academic contexts.
彼はピアノで即興演奏した。
He improvised on the piano.
Short for improvisation, used among musicians. Casual and somewhat niche.
今夜はインプロのセッションがある。
There's an improv session tonight.
Referring to a specific ad-libbed line or action in a performance.
The most common term for an ad-libbed line or action. Used in theater, comedy, TV, etc.
あのアドリブは最高だった。
That ad-lib was the best.
Can be used as a noun meaning improvisation, but less common for a single line. More abstract.
There is no single Japanese verb that directly translates 'to ad-lib'. Use アドリブで〜する or 即興で〜する with the appropriate verb (話す, 演奏する, やる, etc.).
アドリブ is more common in everyday speech and entertainment. 即興 is slightly more formal and often used in written language or serious arts contexts.
彼の即興は観客を笑わせた。
His improvisation made the audience laugh.