The product name is a manufacturing classification
Japanese tea is classified by what was done to it rather than by leaf appearance, so the product name on the front of a pack is already a specification. Sencha is the standard steamed green tea from ordinary sun-grown leaf. Gyokuro is shaded for an extended period before picking. Kabusecha is shaded more briefly. Tencha is shaded leaf dried without rolling, and matcha is tencha ground. Bancha is made from later-harvest or coarser leaf. Kukicha and karigane are the stem and stalk fractions separated out. Hojicha is roasted, genmaicha is blended with roasted rice, konacha is the fine fraction, mecha the bud fraction, and tamaryokucha is made with a curled rather than needle shape. Kamairicha is pan-fired rather than steamed and is the exception that proves how much the rest of the vocabulary assumes steaming. None of these is a quality tier and several are commonly mistaken for one. A kukicha is not a lesser sencha, it is the stem fraction with its own distinctly sweeter character; a bancha is not a failed sencha, it is a product built around what later leaf is good at.
Ichibancha, nibancha and shincha
The picking is stated more often on Japanese packaging than on almost anything else, and it is the field with the most consequence. Ichibancha is the first picking of the year, nibancha the second, and the sequence continues; shincha names the new tea of the season and is a marketing category as much as a technical one, sold precisely because it is new. First-picking leaf grows slowly out of winter reserves in cool weather and modest light and is generally richer in the amino acid fraction relative to the polyphenols, which is the chemical account behind the premium. Later pickings grow fast under strong summer light and give a brisker, coarser, more astringent leaf that is the correct raw material for bancha, hojicha and genmaicha. A pack stating ichibancha has made a claim somebody could check; a pack stating no picking at all on a sencha at a premium price has left out the most informative field it could have carried. For shincha specifically, the date matters more than for anything else in the catalogue: buying it late in the year defeats the product rather than merely diminishing it.
Steaming depth, which is a style rather than a grade
The length of the steaming step is a maker’s decision with large consequences and it is frequently printed. Asamushi is a light steaming, chumushi a standard one and fukamushi a long one, and the vocabulary is used loosely enough that the boundaries are conventions rather than definitions. A longer steam breaks the leaf structure down further, producing smaller particles, a cloudier and deeper-coloured liquor, a fuller and sweeter cup and a much faster extraction; a shorter steam keeps the leaf intact, the liquor clear and the character more delicate and aromatic. The same cultivar from the same field can be sold as two quite different products on this decision alone. For a buyer the practical consequence is a brewing one: a deep-steamed tea needs a shorter steep and a filter fine enough to hold the fines, and treating it like a light-steamed tea produces a cup that is simultaneously cloudy and over-extracted. It also explains a common disappointment, which is a drinker deciding they dislike Japanese green tea on the basis of one style when the two ends of this axis are further apart than many teas from different countries.
Place, cultivar and the aracha distinction
Prefecture is usually stated and is genuinely informative because the production cultures differ: Shizuoka, Kagoshima, Kyoto and Uji, Fukuoka and Yame, Mie, Miyazaki and Saitama each have their own emphases in cultivar, style and picking calendar. Below prefecture a district or a town narrows it further, and a named grower narrows it most. Cultivar is stated far more often than in any other producing country because the Japanese industry is organised around registered varieties, so a stated cultivar reflects a supply chain that tracked it rather than a marketing decision — although Yabukita accounts for such a large share of planting that naming it describes accurately without distinguishing much. One further term is worth knowing because it changes what a buyer is looking at: aracha is the unfinished crude tea as it leaves the primary processing, before the refining, sorting, final firing and blending that produce a finished sencha. Some producers sell it deliberately. It is a legitimate product with a rougher, more variable character, and it is not a grade of finished tea.
The regulated fields on a Japanese pack
As on any food label there are fields somebody was obliged to get right, and they are the small print rather than the front. A name of the food, an ingredient statement, a net quantity, a date, a storage instruction and the name and address of the responsible business appear in some form. Two of them repay attention here. The origin statement distinguishes where the leaf was grown from where the product was packed, and Japanese-packed tea containing imported leaf is a real category that a country-of-origin statement will disclose and a front-of-pack image will not. And the storage instruction is more informative on Japanese packaging than elsewhere, because producers commonly specify cool storage and, on the better packs, say what to do on opening. TeaHQ describes the architecture rather than the law and has not verified any Japanese labelling requirement; what is asserted is only that the informative fields are the ones somebody had to complete, plus the voluntary ones a producer could only fill in if they knew the answer.
What an English listing usually loses
Almost all of the above. A Japanese pack routinely states product type, picking, steaming depth, prefecture, district, cultivar and sometimes the grower, and an English-language listing for the same tea frequently reduces this to a name, a price and three adjectives. That is not usually concealment; it is the ordinary attrition of copy moving through a supply chain, and the details that could be wrong are the first to go. The practical response is to prefer importers who translate the fields rather than replacing them, and to ask for the ones that are missing, since an importer who bought the tea generally has the producer’s own description and will pass it on. A second response is to learn to recognise the terms transliterated, since fukamushi, ichibancha, kabuse and a prefecture name survive into English even in a thin listing and each of them narrows the tea considerably. Japanese tea is the category where a buyer’s reading of the label buys the most, and it is also the category where the fragility of the product makes getting it right worth the effort.