Matcha is the only tea you eat rather than steep. That single fact governs everything about how it is made. A leaf destined for sencha only has to give up its flavour to hot water for sixty seconds; a leaf destined for matcha has to become something fine enough to suspend in a bowl and pleasant enough to swallow whole. The distance between a tea bush in April and a sealed tin in your kitchen is about four months, and almost every step of it exists to protect a substance that is trying, continuously, to spoil.
One · The Field
Twenty-one days of shade.
Three weeks before picking, the rows go under screens — woven bamboo traditionally, black synthetic netting more often now — cutting something like ninety per cent of the light. The plant responds by loading the leaf with chlorophyll and holding on to L-theanine instead of converting it into the catechins that taste bitter. This is the step that separates matcha from every other green tea, and we have written about the chemistry of it at length elsewhere.
What matters for the rest of the process is what shade does to the leaf physically. A shaded leaf is thinner, softer, and darker than a sun-grown one. It will tear rather than snap. Everything downstream is built around handling something that delicate.
Two · The Pick
The bud and two leaves.
The first harvest of the year — ichibancha — is the only one that becomes ceremonial-grade matcha. The window runs about two weeks in late April and early May. Pickers take the unopened bud and the two young leaves beneath it, and nothing below that; the third and fourth leaves are tougher, higher in catechins, and will read as bitterness in the bowl.
Picking happens in the morning. By afternoon a cut leaf has begun to respire and lose its volatile compounds, which is why the next step cannot wait.
Three · The Steam
Twenty seconds against oxidation.
Within hours of leaving the field, the leaf is steamed — fifteen to twenty seconds, sometimes less. Steaming denatures the enzymes that would otherwise begin oxidising the leaf, the same process that turns green tea into black. This is the fork in the road: steam it and it stays green, skip it and it browns.
The Japanese method is steam; the Chinese tradition pan-fires instead. The difference is audible in the cup. Steamed tea keeps a marine, vegetal register — seaweed, fresh grass. Pan-fired tea goes toasty and nutty. Matcha is unambiguously on the steamed side of that line.
Four · Tencha
Dried, then taken apart.
After steaming the leaf is cooled, blown dry in tall drying ovens, and — crucially — never rolled. Sencha is rolled and twisted; matcha leaf is left flat, because the next operation is to remove everything that is not soft leaf tissue.
Stems, veins and midribs are separated out mechanically and by air, leaving only the fleshy part of the leaf. What remains is tencha: flat, brittle, dark green flakes. Tencha is the actual raw material of matcha, and a tea that never reaches the consumer in that form. It is then rested in sealed containers, often cedar, for anything up to several months. The resting rounds the flavour off, the way a young wine settles.
Five · The Stone
Forty grams an hour.
Tencha is milled between two granite wheels turning at forty to eighty revolutions per minute. The speed is the whole point. Grind faster and friction heats the powder; above roughly thirty degrees Celsius the aromatics burn off and the colour dulls toward yellow. So the wheel is kept slow, and a single mill produces around forty grams of matcha in an hour.
Put another way: filling one thirty-gram tin takes about forty-five minutes of a stone wheel turning in a cold, dim room. There is no industrial shortcut that produces the same particle. Ball mills and air mills exist and are faster; the powder they make is coarser and tastes it.
Six · The Tin
Against light, air and heat.
Milled matcha has an enormous surface area and three enemies: oxygen, light, and warmth. It is packed immediately into opaque, airtight tins, and from that point the clock is running. Sealed and refrigerated, a tin holds its character for months. Opened, it is at its best for about thirty days.
This is the part most guides leave out, and the part that decides what you actually taste. A tea that survived four months of careful work can be undone in a fortnight by a jar left on a sunny counter. Keep it cold, keep it dark, keep it shut — and drink it while the colour is still the colour it had when it left the stone.