Kensui (waste water vessel)
The open vessel that rinse water is emptied into during a chanoyu gathering. Functionally it is identical to the Chinese waste bowl, and it is worth saying that plainly: the same job, the same shape, two practices that arrived at it separately and place the object very differently within the room.
Identity
- Category
- Accessory
- Native name
- 建水
- Romanised
- kensui
- Also called
- slop bowl, waste water container
- Material
- Metal, ceramic or lacquered wood
- Typical capacity
- 500–1500 ml
- Skill level
- Advanced
Porosity
Not porous. It contributes nothing of its own to the liquor, so it can be moved between teas freely and washed with detergent without consequence.
Where it comes from
Japanese, and specific to chanoyu, where the kensui is conventionally the least formal object present and is handled accordingly. The Chinese equivalent is recorded separately at `equip-waste-water-bowl` because the practices around it differ even though the vessel does not.
Named here rather than presented as generic equipment. The object belongs to a practice, and TeaHQ describes it from the outside.
If you do not own one
Any bowl. This is the object in the room with the least to it.
This one is not marked essential. The tea can be made without it.
Brewing methods it is used for
- Whisking (bowl-prepared powdered tea) — Powdered leaf suspended in water rather than steeped and strained — the only common preparation in which the leaf itself is consumed rather than discarded.
- Koicha (thick matcha) — Matcha prepared thick enough to pour like paint rather than to whisk into foam. It is not a stronger version of everyday matcha but a separate preparation with its own motion, its own grade of powder and, in chanoyu, its own place in the sequence — and it is the older of the two.
Tea types it suits
Care and maintenance
Empty and dry immediately after use. Metal examples pit where water is left standing, and lacquered ones should be wiped rather than washed.
Other accessorys
- Alcohol burner
- Cha dao utensil set
- Cha he (tea presentation vessel)
- Charcoal brazier (fenglu)
- Cup stand (chatuo)
- Electric ceramic tea stove
- Futaoki (lid and ladle rest)
- Hishaku (bamboo water ladle)
- Induction plate
- Kusenaoshi (whisk stand)
- Mortar and pestle
- Podstakannik (glass holder)
- Ro and furo (hearth and brazier)
- Ryoro (senchado charcoal stove)
- Stone tea mill
- Tea boat
- Tea cloth
- Tea cosy
- Tea mat (chaxi cloth)
- Tea pet
- Tea pick (cha dao)
- Tea tongs
- Tea tray (cha pan)
- Teapot warmer
- Waste water bowl (jianshui)
- Water cooling bowl (sukwoo)
- Water filter jug
- Yuzamashi (water cooler)
Sources
This page is TeaHQ synthesis. No external source stands behind the description, the material or the account of how the object is cared for. Where the record names a tradition, that attribution is TeaHQ’s own reading of common practice rather than a citation.
TeaHQ names no maker, brand or shop and has nothing to sell. Nothing on this page should be read as advice to buy the object — the substitute note above exists because owning it is usually optional.