kotatsu; table over an electric heater (orig. a charcoal brazier in a floor well) with a hanging quilt that retains heat
sunken kotatsu; low table over a hole in the floor (may have a heat source underneath and a hanging quilt to retain warmth)
quilt coverlet for a kotatsu; kotatsu quilt
square latticed wooden frame for a kotatsu
futon or cloth attached to the kotatsu's frame; cover for kotatsu
kotatsu not put away but used in spring
someone who curls up under a kotatsu all winter; kotatsu bug; kotatsu snail