Culinary Matcha, Mogacha, and the Gap Between Label and Reality

There are more matcha products on the market than ever before. New brands appear almost weekly — in grocery stores, cafés, online. Some are excellent. But a significant number of them don’t qualify as matcha by Japan’s own definition.

This isn’t a niche technicality. It affects what you taste, what you pay for, and what you put in your body. Understanding the difference matters — not to gatekeep, but to help you make informed choices.

What matcha actually is — the official definition

The Japan Tea Industry Central Association (公益社団法人日本茶業中央会), the primary body governing Japanese tea classification, defines matcha as:

“Tencha — tea leaves that were shade-grown (覆下栽培), steamed, and dried without rolling in a tencha kiln — ground into a fine powder using a stone mill or equivalent.”^[1] — Japan Tea Industry Central Association, “Green Tea Labeling Standards” (緑茶の表示基準)

Three requirements must be met for the powder in your cup to be called matcha: the tea must be shade-grown, it must be processed into tencha (not sencha or any other tea type), and it must be finely ground. Remove any one of these, and it’s technically not matcha — it’s powdered green tea.

In 2023, the International Organization for Standardization (ISO) published a technical report (ISO/TR 21462:2023) further documenting these requirements, based on Japan’s traditional cultivation and processing methods.^[2] This was a significant step toward establishing a global consensus on what matcha is — though it remains a report, not yet a binding standard.

Tencha — the raw material that makes matcha possible

To understand what separates real matcha from imitations, you need to understand tencha (碾茶). This is the intermediate product — shade-grown tea leaves that have been steamed and dried flat, without rolling, in a specialized tencha kiln. Tencha looks nothing like the tightly rolled needles of sencha; it resembles flat, brittle flakes, almost like dried seaweed.

Making tencha is expensive. It requires dedicated shade structures (either traditional shelf-type “tana” frames or direct-cover netting), 20–30 days of light deprivation before harvest, and a specialized tencha kiln — a large, purpose-built drying machine that costs significantly more than sencha processing equipment. Only the youngest, most tender first-flush spring leaves (一番茶) are used for high-quality tencha.^[3]

This is why tencha — and therefore matcha — is inherently more expensive than regular green tea. The shading alone increases labor and material costs substantially, and the dedicated processing equipment limits who can produce it.

The math that doesn’t add up

Japan produced approximately 4,176 tonnes of tencha in 2023, according to the National Tea Producers Federation (全国茶生産団体連合会). In the same year, Japan exported over 4,200 tonnes of powdered tea.^[3] That’s already more powder exported than tencha produced — and this figure doesn’t include the enormous domestic market for “matcha” flavored foods, drinks, and desserts.

Where does the extra “matcha” come from?

The answer lies in two products that most consumers outside Japan have never heard of: mogacha and akitencha.

Mogacha — the sencha-line substitute

Mogacha (もが茶, sometimes written モガ茶) is what the Japanese tea industry calls “simplified tencha” (簡易碾茶). It’s made using sencha processing equipment rather than a tencha kiln, with the rolling steps omitted to produce flat, tencha-like leaves that can be ground into powder.^[1][4]

The key differences from true tencha:

Mogacha production began in Mie Prefecture around 1985, initially driven by growing demand for affordable “matcha” in processed foods and beverages.^[4] As a Uji tea wholesaler with over four decades of experience explains, the timing coincided with the rise of canned green tea beverages and the food industry’s expanding appetite for green tea flavoring.

The raw material for mogacha is typically unshaded autumn bancha — leaves that were essentially destined to be discarded. Without shade-growing, there’s no build-up of L-theanine (the amino acid responsible for matcha’s umami sweetness), no suppression of catechins (the compounds that cause bitterness), and no development of the vivid green chlorophyll that gives proper matcha its color.^[3]

Akitencha — the autumn harvest alternative

Akitencha (秋碾茶, literally “autumn tencha”) occupies a middle ground. Unlike mogacha, it is processed in a proper tencha kiln, and it may be shade-grown. But the raw material is autumn leaves rather than first-flush spring harvest.^[1]

Spring first-flush leaves are to tencha what the first pressing is to olive oil — the most concentrated, flavorful, and nutritious. Autumn leaves, even when properly shade-grown and processed, lack the depth and complexity of spring harvest. They produce a functional green powder, but one that any experienced tea taster would distinguish from true spring-harvest matcha.

Both mogacha and akitencha are ground into powder and sold — often as “食品加工用抹茶” (matcha for food processing), “加工用抹茶” (processing-grade matcha), or simply “抹茶” (matcha) with no qualifier at all.^[1][3]

These aren’t “bad” teas

It’s important to be clear: mogacha and akitencha are not fraudulent products within the Japanese domestic market. They exist because there’s genuine demand for affordable green tea powder for use in food manufacturing — ice cream, confections, lattes, smoothies, baked goods. They serve that purpose well, and the farmers who produce them are making a practical economic choice.

As one Shizuoka tea farmer writes with characteristic bluntness: the issue isn’t that these products exist. The issue is that when they reach consumers, the qualifying labels (“for food processing,” “industrial use”) tend to disappear, and what remains is simply the word “matcha.”^[5]

This creates a situation where a consumer paying $10 for 100g of “ceremonial grade matcha” might reasonably assume they’re getting the same category of product as someone paying $40 for 30g — when in reality, the two products may have almost nothing in common beyond being green powder.

“Ceremonial grade” and “culinary grade” — labels that don’t exist in Japan

Neither “ceremonial grade” nor “culinary grade” is a term used in the Japanese tea industry. There is no governing body that certifies these grades, no standardized testing, and no legal definition.^[6]

In Japan, matcha quality is determined by the tea master’s expertise: evaluating the tencha through visual inspection, aroma, taste, and experience. High-quality matcha for tea ceremony (濃茶/薄茶) and lower-quality matcha for daily use are distinguished by the tea master’s judgment and the resulting price — not by a stamped label.

“Ceremonial grade” and “culinary grade” are Western marketing constructs, introduced to help English-speaking consumers navigate a product category they’re unfamiliar with. The problem is that without a standard behind them, any seller can apply any label to any product. The terms have become almost meaningless.

The stone mill question

A common claim in matcha marketing is that “stone-milled” matcha is inherently superior. Stone milling is indeed the traditional method, and it produces exceptionally fine, uniform particles (5–10 microns) with minimal heat generation. But there’s a practical reality that’s often overlooked.

A single stone mill can produce only about 30–40 grams of matcha per hour.^[3] That’s roughly 350 kg per year if run continuously — which is, of course, impossible. To process Japan’s entire tencha production (4,176 tonnes) by stone mill alone would require tens of thousands of mills.^[3] The reality is that a significant portion of commercially available matcha is ground using ball mills or jet mills, which can produce comparable particle sizes at much higher volumes.

The quality of the tencha — not the milling method — is what primarily determines how the matcha tastes. A mediocre tencha stone-milled will taste worse than an excellent tencha ball-milled. Both methods have their place, and transparency about which method is used matters more than claims of superiority.

Why this matters — and what you can do

The global matcha market is booming. That’s mostly good news — it means more people are discovering Japanese tea, and it creates economic opportunity for Japanese tea farmers. But as the tea photographer Ōki Ken (大木賢) notes, Japan’s tea industry has been here before. In the early 20th century, Japan was a major tea exporter — until quality corners were cut to chase volume, consumer trust collapsed, and markets shifted to cheaper competitors in China and Sri Lanka.^[3]

The matcha market risks repeating this pattern if “matcha” continues to mean everything from carefully shade-grown, stone-milled first-flush tencha to unshaded autumn bancha run through a sencha machine and a grinder.

As a consumer, the most powerful thing you can do is ask questions. Where was this grown? What cultivar? Was it shade-grown, and for how long? Is it made from tencha? How was it milled? Honest producers — whether they sell a $20 everyday matcha or a $100 ceremonial grade — will answer clearly. Producers who can’t or won’t answer are telling you something, too.

Kawagiri’s approach

At Kawagiri, we list the cultivar, origin, producer, farming method, and milling method for every matcha we sell. When we chose ball-milled matcha for our flagship Matcha Okumidori, we said so upfront — and explained why. When our Matcha Yumewakaba and Matcha Sonogi are stone-milled, we say that too. Transparency isn’t a marketing angle for us — it’s the baseline.

We believe in matcha you can trust. Not because of a grade label on the package, but because you know exactly what’s inside.

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