抹茶の等級表示
"Ceremonial grade" is not a standard. What is defined — by ISO and by Japanese food labelling — is how matcha is grown and made, and that definition says nothing about grades.
Wikipedia sets out the definitions: ISO 20715:2023 and the Japanese food labelling standard both require matcha to be made from Camellia sinensis var. sinensis, grown in the shade, steamed and dried without being rolled, and ground to a fine powder. The Japanese standard specifies that the leaves are shaded for two to three weeks before harvest, under coverings such as yoshizu, komo or cheesecloth. That shading is what produces the bright green colour and the strong umami.
Neither standard defines a "ceremonial" or a "culinary" grade — the word culinary does not appear in the article at all. That does not make the terms meaningless in practice; sellers use them consistently enough to be roughly informative. It does mean nobody is checking them, and that a grade word on a packet is a claim the seller has made about itself rather than a specification it has met.
There is a sharper reason to read the rest of the label. Wikipedia notes that for flavouring and colouring foods — mochi, soba, ice cream, lattes, wagashi — matcha made green with colour additives is often used instead of expensive shade-grown matcha. So "bright green" is not by itself evidence of shade growing, which is the thing the standards actually require.
The useful labels are the ones a standard or a place can be held to: where it was grown, when it was harvested, and how long it was shaded. Those are the variables the definitions turn on, and a seller who publishes them has given you something checkable. A grade word has no such backing — which does not make it a lie, only unverifiable.
There is no shop link on this page. Recommending a matcha would mean vouching for a taste, and this site does not taste the things it writes about. The whisk guide below covers the tool rather than the tea.
Sources The other guides鉄瓶と鉄急須
One boils water and gives you iron. Putting the other on heat cracks its lining for good.
土鍋の目止め
Unglazed clay is porous until rice starch seals it — one simmer, once.
漆器の手入れ
Dishwasher, microwave, sunlight. All normal, all irreversible on urushi.
片刃と利き手
Ground on one side only. The wrong side does not cut badly — it does not work.
土鍋とIH
Induction heats metal, not clay. Most donabe never get warm — and cannot be converted.
熊野筆の毛
Not a quality ladder. Natural hair holds powder; synthetic is built for cream and liquid.
砥石の番手
There is no dominant standard behind the number. Two #1000 stones can cut differently.
茶筅の穂数
Carved from a single piece, so a snapped tine is not a repair. The tine count is a spec, not a score.
錆と経年変化
One protects the blade, the other eats it. Scrubbing the wrong one leaves the knife worse off.
三徳・牛刀・菜切
Two of these are the same knife. And a nakiri suits either hand; the usuba it resembles does not.
ダマスカスの意味
The original ceased production around 1900. Since 1973 the word has meant pattern welding — decoration.
白紙と青紙
Blue holds an edge longer and is harder to sharpen. Which is better depends on how often you sharpen.
硬度と刃角
Western knives sit at 52–58 and 20–22°; harder steel is what permits 15–18°. Higher is a different bargain.
まな板と刃
Glass dents, rolls and chips edges rapidly. Wood is self-healing — but grain matters more than "hardwood".
刃物を贈るとき
A gifted knife is said to sever the relationship. The custom is that the recipient hands back a coin.
金継ぎのキット
Real urushi cures in a humid box over days to weeks. A kit that sets in an hour is something else.
沈香と伽羅
The scent exists because the tree was infected. Uninfected wood is pale and light — whatever was added.
箸の形と作法
Pointed where Chinese ones are blunt. And two ordinary gestures read as funeral rites.