A chasen is carved from one piece of bamboo, so a broken tine cannot be replaced — and the tine count is a specification for a job, not a score.
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The whisk is hand-carved from a single piece of bamboo. Wikipedia’s article on Japanese tea utensils lists what varies between them: the type of bamboo, the shape of the tines, the number of tines, the thickness and length of the bamboo, and the colour of the thread bound around the base. Different schools prefer different styles, and specific styles exist for thin tea, thick tea, tall bowls, portable sets and outdoor use.
So “80 tines” is not a grade above “60 tines”. It describes a whisk built to whip air into a thin tea. Buying the highest number available because it sounds better is the same error as buying the widest tamper — a specification read as a ranking. And because the whole whisk is one piece of bamboo, a snapped tine is not a repair; it is the beginning of the end of that whisk.
Chasen on Amazon — read for one piece of bamboo ↗A starter set — chasen, chashaku and sifter ↗
Two things follow for care, and both are about water. A new whisk is stiff and its tines are curled inward; soaking the tines briefly in warm water before first use softens them so they open without snapping. And a wet bamboo whisk left in a drawer is the ordinary way one goes mouldy — it wants air, tines downward-facing but not resting on them. The traditional answer is a kusenaoshi, a wooden or ceramic shaper: the wet whisk is set on it and left to dry, which both dries it in air and holds its shape.
Chasen are made in several places, Takayama in Nara being the best known. Two things are worth checking in a listing, and most give neither. What tea it is for: a whisk built for thin tea and one built for thick tea are different tools, and the tine count follows from that rather than the other way round. Whether it is carved from one piece: that is what a chasen is, and it is also why a snapped tine ends its useful life rather than starting a repair.
Chasen on Amazon — read for one piece of bamboo ↗A starter set — chasen, chashaku and sifter ↗
Starter sets are how most people buy a first chasen, and they are usually where the question this page asks goes unanswered. One checked on 2026-08-01 stated neither the tine count, nor the bamboo, nor where the whisk was made, nor whether it was carved by hand. If you want a particular tine count, buy the whisk on its own.
A warning about that shelf rather than a recommendation from it: the top of it carries resin whisks sold as a “bamboo whisk alternative”, which is not what this page is about — a chasen is one piece of bamboo, and that is the whole reason a snapped tine matters. The right whisk also depends on which tea you make and, traditionally, on which school you follow: a judgement this site cannot make for you, and one a tine count on its own does not answer.
SourcesThe scent exists because the tree was infected. Uninfected wood is pale and light — whatever was added.
There is no dominant standard behind the number. Two #1000 stones can cut differently.
Glass dents, rolls and chips edges rapidly. Wood is self-healing — but grain matters more than "hardwood".
Two of these are the same knife. And a nakiri suits either hand; the usuba it resembles does not.
JIS defines it — and the definition says most washi today is machine-made from chemical pulp.
Not a quality ladder. Natural hair holds powder; synthetic is built for cream and liquid.
ISO and Japanese labelling define how matcha is made. Neither defines a grade.
Ground on one side only. The wrong side does not cut badly — it does not work.
Blue holds an edge longer and is harder to sharpen. Which is better depends on how often you sharpen.
One protects the blade, the other eats it. Scrubbing the wrong one leaves the knife worse off.
Western knives sit at 52–58 and 20–22°; harder steel is what permits 15–18°. Higher is a different bargain.
Repair is subtraction — grind past the chip on a coarse stone, then work back up the grits.
A gifted knife is said to sever the relationship. The custom is that the recipient hands back a coin.
Friction-fitted, not bonded — so it can be replaced. And a D-shaped handle is made for one hand.
The usual fix starts by soaking it. A seiro maker calls soaking strictly forbidden.
Dishwasher, microwave, sunlight. All normal, all irreversible on urushi.
Uncured urushi gives most people a rash. Cured, reactions are possible but less common.
A prefectural institute put eleven lacquer films through JIS Z 2801. Most came back undetectable.
The original ceased production around 1900. Since 1973 the word has meant pattern welding — decoration.
It conducts heat badly. That is the product — and it is also why it cracks.
Unglazed clay is porous until rice starch seals it — one simmer, once.
Induction heats metal, not clay. Most donabe never get warm — and cannot be converted.
Real urushi cures in a humid box over days to weeks. A kit that sets in an hour is something else.
Not urushi against epoxy. Whether the material states food-contact compliance.
Pointed where Chinese ones are blunt. And two ordinary gestures read as funeral rites.
Sumi is soot held by animal glue. India ink needs no binder and dries waterproof on its own.
The body is impermeable. It is the decoration that is exposed — and you can feel which kind it is.
One boils water and gives you iron. Putting the other on heat cracks its lining for good.
The spots appear in the first week. The makers’ association says do not take them off.
The form is settled by a 2003 paper. The amount is not settled by anything.
