Japanese steamed green tea
Fixation by steam within hours of plucking, then a rolling sequence that dries and shapes at once — and then a second factory that turns one intake into four named teas.
What makes this route what it is
Two decisions, at opposite ends. Steam at position two, which fixes without toasting and is why the cup is marine and vivid green rather than nutty and yellow-green. And a refining tail at positions six to eight that no Chinese route has, which is why one Japanese intake yields four commercial teas and why the same aracha can be finished into recognisably different products by two different refiners.
The route, in order
Each note describes what the step is doing in this route. The same operation does a different job in a different chain.
The dominant method in Japan, and the reason fields are laid out in level rows from the start. The route tolerates it because steaming is far less sensitive to a mixed intake than pan-firing is.
Hand plucking survives for shincha and top gyokuro lots, where the price supports it and the uniformity is audible in the cup.
Seconds of live steam, and the duration is itself the style axis: a short steam leaves needle-like leaf and a clear cup, a long one breaks the leaf down for a cloudy, heavy, deep green liquor.
A dedicated blower rather than an interval. Steamed leaf carries enough heat and surface water to keep cooking itself, and on a continuous line there is no pause in which it could cool by standing.
Four machines in sequence rather than one operation, alternating between working the leaf and drying it, so that shaping and moisture removal proceed together instead of one after the other.
- 5.
Drying
Takes the leaf to a moisture at which it can be sold on as aracha. This is where the grower's part of the manufacture ends, which is a commercial boundary as much as a technical one.
The operation that has no Chinese equivalent. One intake is cut to length and separated into leaf, stem, bud and fine fractions, each of which is a tea in its own right.
The last heat the tea receives, and the largest stylistic lever after the steamer. Low firing keeps the fresh marine note; high firing builds a nutty, roasted-grain sweetness that some houses are known for.
Combining lots from several growers against a retained reference sample, which is why a shop's sencha is the same in April and November while no single grower's is.
Single-grower, single-cultivar teas skip it entirely and accept the seasonal variation as the point.
How it differs from its neighbours
A route described on its own teaches very little. The useful fact is always which other route it is nearly identical to, and where it leaves it.
One position in the route is filled by a different named method. The shape of the route is unchanged.
Steam rather than hot metal, at the same position in the route. It is the substitution that separates two whole national traditions, and it is a single slot.
This route inserts an operation the other does not have. Nothing is substituted and nothing is removed.
This route rolls and the matcha route does not. Rolling ruptures cells, tightens the leaf and makes it brew fast — and it also makes the leaf impossible to grind into a smooth powder afterwards, which is why the decision cannot be deferred.
Where it goes wrong
Steaming is measured in seconds and the window is unforgiving: too short and enzyme activity survives in the thickest parts of the leaf, so the batch reddens unevenly; too long and the leaf structure collapses, which is deliberate in fukamushi and a fault everywhere else. The cooling immediately afterwards is where a fast line most often cuts a corner, and leaf that enters the rollers hot ends up stewed.
In full
The Japanese route is the most industrially integrated in tea and the only one that is routinely split between two businesses. Leaf is steamed within hours of arriving, cooled immediately in a blower, and passed through a series of rolling machines that work it and dry it in alternation until it is a dark green needle. What comes out is aracha — correctly made and not yet a product, because it holds long unbroken leaf, stem, buds and fines together and carries too much moisture to keep. A refiner then cuts, screens, winnows and de-stems it, and the fractions are sold as different teas: sencha from the leaf, kukicha from the stem, mecha from the small rolled buds, konacha from the fines. A final firing sets the style, and blending against a house standard sets the consistency. A drinker buying a shop's own sencha is buying the last three of those operations at least as much as the first four.