A kyūsu is a traditional Japanese teapot mainly used for brewing green tea.
Kyūsu pots with side handle (right) and top handle, design by Masahiro Mori
Kyūsu tea pot with side handle
Kyūsu teapot for steeped tea inscribed with a waka poem by Ōtagaki Rengetsu, stoneware with rice-straw-ash glaze, mid-19th century, late Edo period-early Meiji era
Kyūsu tea pot with sidehandle, design of landscape, underglaze blue, by Mizukoshi Yosobei in Kyoto, late Edo period or the early Meiji era, 19th century
Tetsubin are Japanese cast-iron kettles with a pouring spout, a lid, and a handle crossing over the top, used for boiling and pouring hot water for drinking purposes, such as for making tea.
Kyūsu
…Japanese tea ceremony Tetsubin, a cast iron Japanese kettle Media related to Kyūsu at Wikimedia Commons…
A tetsubin cast-iron kettle is suspended over an irori hearth in a traditional Japanese style farm house, at the Boso-no-Mura Museum
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