空そらで

expression

off the top of one's head; from thin air

Used when saying or doing something without preparation, evidence, or reference; often implies improvisation or making things up on the spot.

• 彼かれは空そらでスピーチをした。

  He gave a speech off the top of his head.

• そんな話はなしは空そらで言いっているだけだ。

  He's just saying that out of thin air.

expression

from memory; by heart

Used when reciting, singing, or reproducing something entirely from memory without looking at notes or text.

• 彼かの女じょは長ながい詩しを空そらで暗あん唱しょうした。

  She recited the long poem from memory.