Tetsubin

At least one authoritative Japanese source[1] states that it developed from the spouted and handled water kettle called tedorigama that was already being used in chanoyu in the era of Sen no Rikyū (1522–1591).

During the 19th century, infused tea became more popular and tetsubin were considered primarily status symbols rather than functional kitchen items.

Throughout the 18th century, people started drinking sencha as an informal setting for sharing a cup of tea with friends or family.

Throughout the 18th century, tetsubin kettles became a standard household utensil for heating water to make tea with.

During the 19th century, tetsubin designs went from simple basic iron kettles, to elaborately engraved masterpieces.

A tetsubin cast-iron kettle is suspended over an irori hearth in a traditional Japanese style farm house, at the Boso-no-Mura Museum
A tetsubin on a brazier ( hibachi )
Tetsubin can be found in many colors with various designs and patterns such as this red one that has symbols depicting each of the four seasons for good luck
A modern cast-iron teapot in use at the Asian Art Museum of San Francisco café