Behind this fine green powder that colors our lattes and pastries lies a millennia-old Japanese craftsmanship. Matcha, far more than just powdered tea, represents the culmination of a unique production process. From shaded cultivation to stone mill grinding, each step reveals why this particular green tea powder fascinates tea enthusiasts and pastry chefs alike.

Key takeaways

• Matcha comes from tea leaves cultivated in shade for 4 weeks before harvest
• Only young shoots of Camellia sinensis are selected in spring
• The production process transforms the leaves into "Tencha" before final grinding
• Traditional stone mill grinding produces only 30g per hour
• This ancestral method explains the exceptional quality and price of true Japanese matcha

Shade cultivation: the secret of intense green color

It all begins in Japanese plantations, mainly in the Uji region near Kyoto. Unlike other green teas, tea plants destined to produce matcha undergo very particular treatment. Four weeks before the spring harvest, producers completely cover the plantations with a dark cloth.

This technique, called "tana", deprives the plants of 90% of sunlight. Deprived of normal photosynthesis, the leaves compensate by massively producing chlorophyll to capture the slightest ray of light. It's this chlorophyll overproduction that gives matcha its characteristic jade green color.

But that's not all! This shade cultivation also modifies the chemical composition of the leaves. They develop more L-theanine, that amino acid responsible for the umami taste so sought after in quality matcha. At the same time, tannins decrease, reducing the natural bitterness of the tea.

Harvest: precise timing

Matcha harvest occurs only once a year, in spring, generally between April and May. Pickers select only the tender young shoots of Camellia sinensis, those first leaves packed with nutrients and aromas.

This manual harvest requires considerable expertise. Each leaf is inspected: too old, it will bring bitterness; too young, it will lack body. Only perfect leaves, deep green with a silky texture, are selected to become premium matcha.

As soon as picking is complete, the leaves are immediately transported to the processing facility. Time is of the essence: the longer the leaves wait, the more they risk oxidizing and losing their precious organoleptic qualities.

Steaming: stopping oxidation to preserve freshness

First crucial transformation step: steaming. Fresh leaves are placed over high-temperature steam for just a few minutes. This technique, inherited from Japanese tradition, immediately stops the enzymatic oxidation process.

Unlike black tea which ferments, or partially oxidized oolong tea, matcha thus preserves all its vegetal freshness. Steaming also preserves that vibrant green color characteristic of Japanese green teas.

After steaming, the leaves are quickly dried at 180°C. This rapid drying prevents any degradation of active compounds while preparing the leaves for subsequent steps. At this stage, we obtain what is called "Aracha", literally "crude tea".

Sorting and transformation into Tencha

The Aracha then undergoes meticulous sorting. All stems, veins, and dust are carefully removed, keeping only the pure "flesh" of the leaves. This precision work, often done by hand or with ultra-sophisticated machines, guarantees the fineness of the final product.

The sorted leaves are then uniformly chopped to obtain "Tencha". This intermediate step is crucial: the size of the pieces must be perfectly homogeneous to ensure regular grinding during the final stage.

The Tencha is then classified according to different criteria: color, aroma, leaf origin. Tea masters then create blends, mixing different batches to obtain the desired taste profile. Each producer jealously guards their blending recipes, true manufacturing secrets passed down from generation to generation.

Stone mill grinding: the ultimate art

Here is the most spectacular and delicate step: grinding Tencha into matcha powder. The best producers still use granite stone mills today, an ancestral technique unchanged for centuries.

These mills turn very slowly, barely 60 revolutions per minute, to avoid any heating that would alter the delicate aromas. The process is fascinatingly slow: a single mill produces only 30 grams of matcha powder per hour! This slowness partly explains why true Japanese matcha remains an exceptional product.

The fineness achieved is extraordinary: matcha particles measure less than 10 microns, ten times finer than regular flour. This extreme fineness allows matcha to dissolve perfectly in water, creating that characteristic velvety texture.

Some modern producers use mechanical grinders to reduce costs, but connoisseurs know how to recognize the difference. Stone-ground matcha retains incomparable aromatic complexity and smoothness on the palate.

Different grades: understanding quality

Not all matchas are equal! Quality depends on many factors: leaf age, production region, grinding method, and of course the producer's know-how.

Ceremonial grade represents the pinnacle of quality. Made exclusively from the first leaves of the harvest, stone-ground, it offers remarkable smoothness with pronounced umami notes. Its intense jade green color testifies to its richness in chlorophyll.

Premium grade, slightly less refined, remains excellent for pure tasting. It blends first and second leaves, maintaining a beautiful balance between smoothness and character.

Culinary grade, more affordable, is perfect for baking and milk-based beverages. More bitter than higher grades, it brings that sought-after vegetal note to sweet creations without breaking the budget.

Why does this process make matcha so special?

This particular manufacturing explains why matcha fundamentally differs from other green teas. Unlike a classic infusion where you discard the leaves, with matcha, you consume the entire leaf in powder form.

This particularity concentrates all the benefits: antioxidants, vitamins, minerals, everything is preserved and assimilated by the body. L-theanine, developed through shade cultivation, provides that sought-after feeling of energizing calm.

The unique texture of matcha, that creamy foam obtained with a whisk, results directly from this extreme fineness. No other tea can reproduce this particular sensory experience.

Finally, this ancestral manufacturing method connects each cup to centuries of Japanese tradition. Drinking matcha means participating in a millennia-old ritual, honoring a know-how passed from master to disciple since the 12th century.

Frequently asked questions about matcha production

Why does real matcha cost so much?

The price of authentic matcha is explained by the complexity of its production. Between shade cultivation that reduces yields, selective manual harvesting, and especially stone mill grinding that produces only 30g per hour, each step requires considerable investment in time and expertise. Ceremonial quality matcha represents months of work for a few grams of powder.

Can matcha be made outside Japan?

Technically yes, but the result differs noticeably. A few producers in China and Korea attempt the experiment, but Japanese terroir, specific climate, and especially ancestral know-how give Japanese matcha unique complexity. Japan's volcanic soils, rich in minerals, also subtly but perceptibly influence the final taste.

How to recognize quality matcha by its color?

An excellent matcha displays an intense jade green color, almost fluorescent. This hue results from the richness in chlorophyll developed during shade cultivation. Dull, yellowish, or too dark matcha indicates either lower quality leaves or a deficient manufacturing process. The powder should also be extremely fine, without lumps.

What is the difference between Tencha and matcha?

Tencha constitutes the intermediate step before final matcha. It consists of steamed, dried leaves stripped of their stems, but not yet ground. Some enthusiasts consume Tencha as an infusion, appreciating its delicate aromas. But to obtain that fine powder characteristic of matcha, grinding remains essential.

How long does it take to produce matcha?

From the start of shaded cultivation to the final powder, the process spans several months. Four weeks of shading, then harvest, immediate transformation into Tencha, and finally grinding that can take weeks depending on quantities. For 100g of premium stone-ground matcha, count approximately 3 to 4 hours of pure grinding, not counting all the preparatory steps.