Chagama

[1][2] Kama are often round or cylindrical, and have a lug on each side, for inserting metal handles called kan.

Kama are made of cast iron or copper and are used to heat the water used to make tea.

In the Tatami flooring of the tea rooming a hole is created to put the kama in, over the fire.

A bed of ashes, called Hai (灰), is laid beforehand inside the furo and the sumi placed on top is lit.

On the edge of a Furo a fire window or cut-out opening provides the necessary draft to keep the Sumi (charcoal) burning properly.