How to say "off-the-cuff" in Japanese

• 即席そくせきCommon
  no-adjectiveSuits 'off-the-cuff' in the sense of something thrown together on the spot — a speech, an answer, a plan — often with a nuance of hasty, makeshift making rather than polished performance.
  彼かれは即席そくせきに立派りっぱな演説えんぜつをした。↗

  He made a splendid off-the-cuff speech.
• 即興そっきょうCommon
  no-adjectiveFits 'off-the-cuff' when the point is improvising as you perform or create — music, comedy, theater, verse; it highlights spontaneous invention in the moment rather than something merely assembled quickly.

Both render 'off-the-cuff': 即席 stresses something assembled on the spot, often hastily, while 即興 stresses improvising a performance or creation in the moment; for off-the-cuff remarks both can fit.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 即席そくせきimpromptu
• 即興的そっきょうてきimprovised
• 即興そっきょうimprovised