Two-Thirds of Japan's Tea Is One Cultivar

Wine trained a generation of drinkers to ask which grape. Coffee did the same with varietals and origins. So it is a reasonable instinct to arrive at Japanese tea and look for the equivalent line on the packet — the variety that explains why this one tastes different from that one.

The line is usually not there, and when it is, most shoppers have no way to read it. But the deeper reason is more interesting than a labelling gap.

Sixty-seven percent of Japan's tea-growing area is planted with a single cultivar: yabukita. Not two-thirds of one region, or of one grade. Two-thirds of the country's acreage, by the agriculture ministry's own figures.

Which means the range you taste across sencha, gyokuro, matcha, hojicha and genmaicha is, most of the time, not the range between different plants. It is what shading, harvest timing, steaming and roasting can do to the same one.

The numbers

Planted area by cultivar, in hectares, with each cultivar's share of the national total:

Two things are happening at once, and it is worth separating them.

The concentration is easing. Yabukita has gone from 76% to 67% of the planted area in fifteen years. In absolute terms the drop is larger than the percentage suggests — from 36,174 hectares to 22,193, because the total tea area shrank as well.

It is still two-thirds. No other cultivar has reached even 8%. The second-place plant occupies a tenth of yabukita's ground.

What a cultivar is, and why one can dominate

Tea is Camellia sinensis, and a cultivar is a selected line of it — chosen for when it buds, how much it yields, how it handles cold and disease, and what it tastes like after processing.

Crucially, tea cultivars are propagated by cuttings rather than from seed. The national cultivar handbook describes each new release partly in terms of its sashiki kassakuritsu — how reliably cuttings take root. A field of one cultivar is a field of clonal plants, which is what makes uniform harvesting and uniform processing possible in the first place.

That uniformity is the reason a single cultivar can take two-thirds of a country. A processor who knows exactly when the leaf will bud, how it will behave in the steamer, and what it will taste like afterwards can run a consistent product year after year. Diversity of plants is, from the factory's point of view, a complication.

The people who grow it are treating this as a problem

This is not an outsider's critique. Japan's national agricultural research organisation, in the introduction to its own cultivar handbook, describes the shift plainly: recent upheaval has accelerated "the review of a production system that depends on a single cultivar, yabukita, for first-flush income," alongside a move toward combining early-, mid- and late-budding cultivars to spread the harvest window.

Read that again, because it explains the whole table. The concern is not primarily flavour. It is timing.

A farm planted entirely with one cultivar has one budding date, so the entire first flush — the harvest that carries the year's income — has to be picked in the same narrow window, processed by the same machines, and sold into the same few days of market. Frost in that window hits everything at once. A labour shortage in that window hits everything at once.

Planting early, mid and late cultivars side by side spreads that risk across weeks instead of days. The flavour differences are real, but they are close to a bonus. The reason to diversify is that a monoculture concentrates every risk onto one date.

The cultivars gaining ground

Three movements in the table are worth naming.

Saemidori has nearly doubled, from 900 to 1,748 hectares. It buds early and is prized for a bright, sweet cup — the most visible of the "quality" alternatives, and the one you are most likely to see named on a premium packet.

Seimei went from 13 hectares in 2019 to 130 in 2023 — tenfold in four years, from almost nothing. It was registered in 2020 and selected for shaded cultivation, which is the tencha route: the leaf that becomes matcha. Given that tencha production has nearly tripled since 2008, a cultivar bred specifically for shading is a direct response to where the money has moved.

Kanaemaru, registered in 2022, buds at the same time as yabukita but carries pest and disease resistance, which makes it a candidate for reducing pesticide use and for organic growing.

None of these will displace yabukita soon. At current rates saemidori would need decades. But the direction is consistent, and it is being driven by production economics rather than by consumer demand for variety.

What this means when you are buying

A cultivar name on the packet is a signal, not a guarantee of quality. Naming saemidori or okumidori tells you the seller is working at a level of specificity where the cultivar was worth mentioning. It does not tell you the tea is better than an unnamed yabukita from a careful producer.

If a tea is unmarked, assume yabukita. Two-thirds of the acreage says the odds are with you, and there is nothing wrong with that. Yabukita became the default because it is genuinely good and genuinely consistent.

Cultivar is not where the big differences live. Shading versus full sun changes the tea more. Steaming time changes it more. Roasting changes it more. If you want to taste a real difference, change the processing rather than the plant — the gap between sencha and hojicha dwarfs the gap between two green-tea cultivars.

A cheaper way to hear that point is to change which part of the plant you are drinking rather than which plant. Stem tea (kuki-cha, or karigane when the stems come from gyokuro) is the same cultivar, the same field, the same year — a different part of the harvest, and a noticeably different cup.

The short version

• Yabukita occupies 67% of Japan's tea acreage — down from 76% in 2008, but still two-thirds
• Tea cultivars are propagated by cuttings, which is what makes single-cultivar fields and uniform processing possible
• Japan's national research body frames the dependence as a problem — a system that relies on one cultivar for first-flush income concentrates every risk on one date
• Saemidori has nearly doubled; seimei, bred for shading and matcha, went from 13 to 130 hectares in four years
• The variety you taste in Japanese tea comes mostly from processing, not from the plant

Cultivar area figures are from the Ministry of Agriculture, Forestry and Fisheries, "Current State and Issues of the Tea Industry and Tea Culture" (November 2024). Cultivar characteristics, registration years and the quoted framing are from NARO's Tea Cultivar Handbook (6th edition).

For what actually creates the differences between Japanese teas, read the guide to Japanese green tea types and what steaming time does to sencha. For where the crop is grown, see where Japanese tea comes from.