How to say "airspace" in Japanese

• 空間くうかんCommon
  nounThe general word for space or room as three-dimensional extent; its 'airspace' sense is only the loose idea of the open air overhead, not a regulated zone — for that, use 空域.
  この無限むげんの空間くうかんに漂ただよう永遠えいえんの沈黙ちんもくが私を恐怖きょうふに陥おとしいれる。↗

  The eternal silence of these infinite spaces terrifies me.
• 空域くういきCommon
  nounThe word for airspace in the aviation sense: a region of the sky defined for flying, as in controlled or restricted airspace. Use this in aviation, military, and drone contexts.

For the aviation sense of 'airspace' — a controlled or restricted region of the sky — use 空域; 空間 means space or room in general, and its 'airspace' sense is only the loose idea of the open air overhead.

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

• 空間くうかんspace
• 空域くういきairspace