Agarwood is the same material in two traditions: oud in the Gulf, jinkō and kyara in Japanese incense. It is also the one where the fragrance has a physical cause, which is what makes fakes detectable in principle.
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Wikipedia describes the mechanism: agarwood forms in the heartwood of Aquilaria trees after they are infected by a Phaeoacremonium mould, and the tree secretes resin defensively against the infestation. As the infection advances the heartwood becomes very dense, dark and saturated with resin. That is where the fragrance lives, which is why density and colour are not cosmetic qualities in this material — they are the evidence that the process happened at all.
The economics follow from the same fact. Wild sources have been depleted, and since 1995 the Convention on International Trade in Endangered Species has listed Aquilaria malaccensis — the primary source — in Appendix II. Japan’s incense trade prices the top grade accordingly: kyara, the grade with high oil content and superior fragrance, is currently worth more than its weight in gold. Cultivated trees are now deliberately infected in parts of Southeast Asia to produce it sustainably.
The two traditions also use it differently, which matters if you are buying for one and reading advice written for the other. Japanese kōdō heats fragrant wood without letting it burn — kōboku, smouldered rather than lit — and that is a separate category from the direct-burning sticks and cones that dominate elsewhere. Wood bought for heating and incense made for burning are not substitutes.
Two things are worth finding in a listing and are often absent. The species and origin — Aquilaria malaccensis is CITES Appendix II, so legitimate international trade in it carries documentation, and a seller who cannot say what species they are selling is telling you something. And whether the wood is wild or cultivated: plantation agarwood from deliberately infected trees is a real product, not a lesser imitation, and a seller distinguishing the two is being straight with you.
No shop link on this page, and here it would be irresponsible: this is a CITES-listed material whose import rules differ by country, and a link cannot know where the reader is. Check what your own customs authority requires before buying across a border.
SourcesThere 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.
Carved from a single piece, so a snapped tine is not a repair. The tine count is a spec, not a score.
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.
