noun
freeze-dried mochi
A traditional preserved food made by freezing mochi outdoors in winter and then drying it; often rehydrated and eaten in soups or as a snack.
凍り餅は、冬の寒さを利用して作られる保存食です。
Kōrimochi is a preserved food made using the winter cold.
祖母が送ってくれた凍り餅を汁物に入れて食べた。
I put the freeze-dried mochi my grandmother sent me into soup and ate it.
Compound of 凍り (kōri, 'freezing') + 餅 (mochi, 'rice cake'). The exact historical origin is uncertain, but the food is a traditional preservation method in cold regions.