About the Zairai Tea Cultivar

zairaiIf you like to buy different Japanese teas online, you may have run across teas that are made with the “zairai cultivar”. What kind of tea cultivar is it?

Zairai (在来) means “native” in Japanese, and in tea it’s used to mean an old tea tree of no identifiable cultivar.

Is zairai a cultivar?

Not in the strict sense of the word.

Cultivars are essentially clones, because the tea plants are grown from cuttings (instead of seeds) so that the characteristics remain the same.

With zairai (sometimes also known as yamacha), each tea tree has very different traits because it came from a seed. They are all collectively known as zairai, but they aren’t really a cultivar.

Characteristics of zairai tea plants

Many of the zairai tea plants are very old, hundreds of years in fact. Unless it’s an old zairai tea field, where the tea plants are regularly trimmed, they have grown into tea trees.

Although only about half as productive as the bushes from the Yabukita cultivar, this trees are quite resistant to pests and have very deep roots. Their leaves have a higher mineral content, and teas made from this leaves are considered to be rare.

Very few zairai tea fields are left. If you look closely at the zairai tea plants in a tea field, you’ll notice that the leaves are different from each other in many ways: flavor, aroma, shape, color, etc. It’s considered a natural blend!

Unfortunately, this lack of uniformity in zaira’s aracha leaves usually results in a lower price when compared to aracha from established cultivars. It’s a shame, because it’s an incentive to erradicate zairai tea plants in favor of popular cultivars.

The only way to experience the taste of tea in old Japan, is to drink one made from a zairai tea plant. It’s a historic asset that will hopefully be preserved forever.

I encourage you to try it!

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4 Responses to About the Zairai Tea Cultivar

  1. All clones are from cultivars, but not all cultivars are clones. Zairai is pretty much a VERY old cultivar that has had time to go feral – much like the “Wild Arbor” cultivars in Yunnan province, China.

    I’ve had a few Zairai arachas. VERY tasty. Different from other sencha out there.

    • Hi Geoff, thanks for the comment.
      The problem with Zairai is that it’s a very broad group. Some tea trees are way much older than others (and thus the flavor changes), and Zairai tea plants from different parts of Japan show a good diversity in many aspects. As much as you would find with modern cultivars.

  2. lochan says:

    Hi Ricardo,

    Had met quite a few farmers in various prefectures and invariably all of them seem to be thinking of having a small plot dedicated to Zairai (在来). Few of them had already started on it.

    Perhaps this is a new thinking that is emerging in Japan. I think they want some differentiation in their teas and also as an insurance for any calamity (genetic or disease etc) in future.

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