Eating orange in the kotatsu.

Speaking of winter in Japan, kotatsu and mandarin orange. A kotatsu is a small table with an electric heater underneath and covered by a quilt. Eating mandarin oranges can resupply a person's vitamin c stores. during the winter. There was no central heating in Japanese houses long ago, so kotatsu were efficient heater for them. When your lower body feels warm, you will want to eat an orange. This is a natural thing to do while relaxing in the kotatsu.