Chawan
The wide ceramic bowl used for whisking matcha.
Also known as: matcha bowl, tea bowl
A chawan is the bowl in which matcha is whisked and drunk. Wider than it is tall (typically 12–14 cm at the rim, 7–9 cm tall, 400–500 ml capacity), the chawan's geometry lets the chasen sweep freely across a flat-ish bottom for proper aeration. Drinking from a chawan is two-handed — supporting the bowl with the left hand and rotating it gently before each sip is part of the ritual. A regular cereal bowl can substitute in a pinch but fights the whisk on every stroke.