Kotatsu (Japanese traditional heater)

Kotatsu is a  Japanese traditional heater with a quit in the cold season.
There is an electric heater below the table so when we sit down there
, it can warm our legs.
We seldom use air conditioner in winter ,so  this is very economical.
After the explosion of the nuclear power plant in Fukushima, I heard that the Japanese
 prefer to use Kotatsu to save electricity .

The calendar is showing that it's the spring season now  but, still I feel cold so I can not
put away the quit and the plug.