noun
shadow sending; staring at one's shadow then at the sky to see an afterimage
A children's game or activity where you stare at your shadow on the ground for a while, then look up at the sky to see a faint afterimage of the shadow. Known from the story 'ちいちゃんのかげおくり'.
影送りをして遊んだ。
We played shadow sending.
ちいちゃんは、お父さんと一緒に影送りをした。
Chii-chan did shadow sending with her father.
Compound of 影 (kage, 'shadow') and 送り (okuri, 'sending'), literally 'shadow sending'. The exact origin is uncertain, but it is a traditional children's pastime.