Japanese Tea Cultivars: The Plants Behind Matcha and Green Tea

By Christian Mauerer, founder of One with Tea · Reviewed August 2026

A cultivar is a tea plant bred for a particular set of traits and then cloned by cuttings, so every bush is genetically the same. Japan grows around 150 of them, and the one in your bowl of matcha shapes its sweetness, its color, and its umami as much as the region or the maker does. Most matcha comes from a small handful of shade-loving cultivars grown around Uji: Samidori, Okumidori, Gokou, Asahi, and Ujihikari.

What is a tea cultivar?

All tea, green or black, comes from one plant: Camellia sinensis. Within it, growers have bred distinct cultivars, short for cultivated varieties, each selected for a trait worth keeping. It is the same idea as grape varieties in wine, Merlot and Chardonnay, or the named varieties behind coffee and apples.

Tea has one quirk that shapes everything. Camellia sinensis is self-incompatible, which means a plant cannot fertilize its own flower or another of the same cultivar. A Yabukita seed will not grow a Yabukita. So to keep a cultivar true, growers take a cutting and clone it, and a whole field becomes one genetic plant, budding and tasting alike. You can read the core terms in our Matcha Lexicon.

A short history: from native seed to Yabukita

Japanese cultivars are a recent idea. Before the late 19th century, farmers planted native seed-grown tea called Zairai, where every bush differed. As the industry modernized, breeders began selecting single outstanding plants and cloning them.

In 1908, a breeder named Sugiyama Hikosaburo selected Yabukita in Shizuoka. It drew scientific attention by 1927, and in 1953 Japan registered its first official list of fifteen cultivars. Selecting a new one is slow work, roughly 20 to 30 years from thousands of seedlings to a single named plant.

The matcha and gyokuro cultivars

Matcha begins as tencha, the shade-grown leaf that is later stone-ground into powder. The cultivars best suited to it can withstand weeks of shading and turn that stress into umami. Most of them come from Kyoto's Uji region and have spread little beyond it.

Flavor notes describe typical single-cultivar bowls; blends and maker style shift them. Cultivar comparison set adapted from d:Matcha and My Japanese Green Tea.

Single-cultivar deep dives: Yabukita · Samidori & Saemidori · Okumidori & Gokou.

Cultivars also differ in when they bud, always measured against Yabukita. Timing decides who dodges the late frosts and who reaches the prized first flush earliest.

The wider cultivar field

Beyond the matcha names, more cultivars carry Japan's open fields and its rarer shaded lots. They matter to matcha drinkers too, because Yabukita and its relatives are also milled into everyday matcha when the price needs to stay low. Here is the rest of the field in this guide, at a glance.

Zairai: the native plants

Before cultivars, there was Zairai, "native" tea grown from seed. Because each bush carries its own genetics, a Zairai field is never uniform, and the plants can be centuries old with deep taproots. That diversity makes Zairai naturally suited to organic farming, and its cup tends toward a deep, earthy character. Only about 2% of Japan's tea area is Zairai today.

Which cultivars dominate?

One plant runs the table. Yabukita alone still covers about 62% of Japan's cultivated tea area as of 2025, and its share has slipped for years, down from over 70% a decade ago as newer cultivars spread (tea-breeding review, 2026). The rest trail well behind: Yutakamidori, Saemidori, Okumidori, and Sayama Kaori each hold low single digits, and native Zairai only about 2%.

For matcha, though, the picture inverts. The plants you rarely meet in a sencha field, Samidori and Gokou and Asahi, are exactly the ones that give a fine gyokuro or bowl of matcha its depth.

How much does the cultivar actually matter?

Here is the honest answer, and it is our house view: the cultivar is real, but it is secondary. Three things shape a bowl of matcha more than the plant’s name.

Shading comes first. Tencha is grown under cover for weeks before harvest, and both the length and the method matter. Good tencha is shaded for more than three weeks. The best method raises the cover on a trellis above the bushes (called tana), rather than laying cloth straight onto the plants. That slow, deep shade is what builds the L-theanine and umami that define good matcha. A short or direct shade flattens even a great cultivar.

The picking standard comes next. The best tencha is hand-picked, taking only the youngest buds. It also comes from bushes left to grow freely (a method called shizen-shitate) rather than the trimmed hedge rows built for machines. Both steps make the tea sweeter and finer. It separates a ceremonial lot from a culinary one far more reliably than the cultivar does.

Then the stone-milling. A granite mill turning slowly keeps the powder cool and fine; speed and heat dull the color and aroma. Only after all three, shading then picking then milling, does the cultivar’s own signature come through: Samidori’s silk, Gokou’s deep umami, Saemidori’s sweetness.

So when a label leads with a cultivar name but says nothing about how the tea was shaded, picked, or milled, read the name as marketing. The plant sets the baseline; the craft decides the cup.

How to choose, without chasing a cultivar name

For almost everyone, the cultivar is the last thing to shop on, not the first. In order:

• Region and grower first. A named origin, Uji, Nishio, Yame, or Kagoshima, and a maker who will tell you how the tea was shaded and picked says more than any cultivar label.
• Then grade and freshness. Ceremonial versus culinary, a recent harvest date, and a tin you will finish within a few weeks of opening beat a rare cultivar sitting stale.
• Cultivar last, for exploration. Once you know what you like, a single-cultivar bowl (a sweet Samidori or Saemidori, or a deep Okumidori or Gokou) is a lovely way to taste what one plant contributes. Most everyday matcha blends cultivars on purpose, for balance.

Frequently asked questions

Does the matcha cultivar matter?

It matters, but less than the craft. Shading, picking standard, and stone-milling shape a bowl of matcha more than the cultivar name does. The cultivar sets a baseline of sweetness, umami, and color; weeks of proper shading, careful hand-picking, and slow cool milling decide how much of that baseline reaches your bowl. A cultivar name with nothing said about how the tea was grown is marketing, not a quality signal.

What cultivar makes the best matcha?

There is no single best. The Uji shaded-tea cultivars, Samidori, Okumidori, Gokou, and Asahi, are the classics for their umami and color, while Saemidori brings sweetness from the south. Most ceremonial matcha is a blend chosen for balance rather than one cultivar.

Is Yabukita used for matcha?

Yes, though it is best known for sencha. Yabukita is adaptable and high-yielding, so it often appears in more affordable, everyday matcha, while the shaded Uji cultivars are favored for higher grades.

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First-flush loose leaf, USDA Organic, direct from Japanese family farms.

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What is the difference between a cultivar and Zairai?

A cultivar is cloned from cuttings, so a field is genetically uniform. Zairai is grown from seed, so every bush differs. Cultivars offer consistency; Zairai offers diversity and a wilder, earthier character.

Why are most matcha cultivars from Uji?

Uji is Japan's historic home of shaded tea, tencha and gyokuro. Its cultivars were selected to endure weeks of shading and to build the umami that shading creates, so they rarely spread to open-field regions.

Does the cultivar change matcha's caffeine or L-theanine?

Somewhat, but shading matters more. Covering the plants before harvest raises L-theanine across shaded cultivars, which is why tencha tastes sweeter and calmer than open-field green tea. The cultivar sets the baseline; the growing method moves it.

Sources

Ricardo Caicedo, "Japanese Tea Cultivar List," My Japanese Green Tea (2022); d:Matcha, "Cultivated Varieties of Japanese Tea"; Australian Tea Masters, "Japanese Tea Cultivars Listing"; Kuwahara Hideki, All About Matcha (Seibundo Shinkosha, 2015); Florent Weugue, Japanese Tea Sommelier (2022); "Advances in tea breeding in Japan," Breeding Science (2026) for cultivated-area figures. Cultivated-area figures are approximate and shift year to year.