autumn sky; clear blue autumn sky
Often evokes the clear, crisp sky typical of autumn in Japan.
秋空の下、運動会が開かれた。
The sports day was held under the autumn sky.
澄
A clear autumn sky stretches out.
Compound of 秋 (aki, 'autumn') and 空 (sora, 'sky'), with rendaku voicing of 空 to ぞら.