You won't want to get out from under the beloved table heater, the kotatsu!
If you talk about Japanese winters, one of the items you can't leave behind is the kotatsu! The entire family gets under the table and eats mandarins and watches TV. The warmth of the kotatsu makes everyone incredibly lazy and you can spend many idle hours under it. If kotatsu didn't exist, maybe Japanese people would work even more?!