It is not common to have a central heating in Japan.
A Kotatsu is a traditional heating system in Japan, which is a table and a heater combined as one piece of furniture.
An electric heater is attached to the underside of the frame. A thick quilt is draped over the frame so the heat is trapped and the table top is placed on top.
Sitting around the kotatsu with the quilt over their legs, family members dine, watch television, chat, read or play games together. Sometimes children do their homework there.
It is an ideal place that encourages face-to-face interaction for the family.
If you visit Japanese house during winter time, you might see it.
