What chawan means
A chawan has a flat, broad base that gives the chasen room to move and a slightly inward-curving rim that contains splashes. Summer chawan are wider and shallower to release heat, while winter shapes are taller and narrower to retain it. Styles such as Raku, Hagi, and Karatsu are tied to specific kilns and have been used in chanoyu for centuries.
Also called
Chawan also appears as matcha bowl, tea bowl.