Chagama

Chagama kettle with Japanese kerria design, Ashiya ware, Shinnari type, 1400s Muromachi period, iron (Registered Important Work of Art)

Chagama (茶釜, "tea kettle") is a Japanese term referring to the metal pot or kettle used in the Japanese tea ceremony. Kama are made of cast iron, and are used to heat the water used to make tea.