noun which may take the genitive case particle 'no', noun
impromptu; improvised; off-the-cuff
Describes something done or made on the spot without preparation, such as a speech, performance, or solution.
He was asked to give an impromptu speech.
They whipped up a meal on the spot for me.
I was asked to give an impromptu speech at the meeting.
He made up a song on the spot.
convenience food; instant food
instant noodles; instant ramen