Millet

…It is a kind of small earthenware teapot, and is mainly made of ceramics, but some are made of metal. It is also written as "kyuyaki" or "kyubiyaki" and is called "kibisho" or "kibisho." It was originally used in China to warm sake, but it was brought to Japan during the Edo period and is said to have come to be used for sencha tea. …

*Some of the terminology explanations that mention "kibisho" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…小型の土瓶ともいうべきもので，おもに陶磁器であるが金属製のものもある。急焼，急備焼とも書き，〈きびしょう〉〈きびしょ〉とも呼ぶ。もと中国で酒を暖める具とされていたが，江戸時代に日本に伝えられ，煎茶に用いられるようになったとされる。…

※「きびしょう」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報