The Story of Japanese Kukicha (the Stem Tea That Tastes Like Sunshine on a Lake)
Kukicha is a Japanese green tea made from stems and twigs, not leaves. Most green teas — sencha, gyokuro, matcha — are made from the leaf portion of the tea plant. Kukicha is made from the parts that get sorted out during processing: the small stems that connect the leaves to the branch, and the leaf veins that are too thick to roll into a needle shape.
If you've ever brewed a sencha and noticed the small yellowish twigs in the bag — that's the kukicha portion. Most sencha producers separate those out because they don't fit the visual standard for sencha. Kukicha is what gets made from them.
It sounds like the parts nobody wants. But kukicha is one of the most distinctive green teas in Japan, with a smooth, almost sweet cup that's unlike any leaf-style green tea. It also has about a third less caffeine than sencha, which makes it popular as an evening drink or for people who are sensitive to caffeine.
This is the story of how kukicha became its own tea category, what makes the cup taste the way it does, and why it's worth trying if you usually drink sencha or hojicha.
What kukicha actually is
Kukicha is sometimes called "stem tea" or "twig tea" in English. The Japanese name means literally "stem tea" — kuki (茎) means stem, cha (茶) means tea.
The stems are collected during the processing of other Japanese green teas. When tea leaves are rolled and shaped into sencha needles, or flattened into gyokuro, some of the material gets separated out — the leaf veins, the small stems, and the broken pieces that don't fit the shape. These are collected, sorted, and either blended with the leaf tea or kept as their own product.
Most kukicha on the market is made from the stems of tea plants that were also harvested for sencha or gyokuro. The tea bushes are the same — it's the same plant, often the same harvest — but the cup is different because the stems have a different chemical composition than the leaves.
Why stems taste different from leaves
The leaf is where the plant does most of its photosynthesis. It's packed with chlorophyll, catechins (the bitter compounds in green tea), and amino acids like L-theanine. The stem has less chlorophyll and fewer catechins. It's mostly structural material — cellulose, lignin, and the compounds that move nutrients up and down the plant.
This is why kukicha tastes the way it does. With fewer catechins, the cup is less bitter. With a different balance of amino acids, the cup has more of the sweet, savory "umami" character that makes Japanese green teas distinctive. The result is a pale yellow tea with a clean, almost brothy flavor and very little of the astringency that some people find off-putting in sencha.
Kukicha also has significantly less caffeine. Caffeine in tea is concentrated in the leaf. Stems have about a third of the caffeine content of leaves. A cup of kukicha at 150°F for 2 minutes has roughly 8 to 10 mg of caffeine, compared to 25 to 35 mg for a comparable cup of sencha.
This combination — less bitter, more umami, less caffeine — is what makes kukicha a staple in certain parts of Japanese tea culture. It's often the tea served at sushi restaurants in Japan, partly because it doesn't compete with the food. It's the tea that monks drink in the evening, partly because it won't keep them up at night.
Where kukicha comes from in Japan
Kukicha is produced wherever Japanese green tea is produced — Shizuoka, Uji, Kagoshima, and the other major growing regions. Most kukicha on the international market comes from Shizuoka, which is the largest tea-producing prefecture in Japan.
The grade of kukicha varies. "Karigane" (雁が音) is a premium kukicha made from the stems and leaf veins of gyokuro or high-grade sencha. It has a more delicate cup than standard kukicha, with even more umami. "Bocha" (棒茶) is a lower grade, made from older stems and twigs, with a more rustic flavor. Most kukicha sold as "kukicha" in the US is in the middle grade — neither karigane nor bocha, but somewhere in between.
The region affects the cup less than the grade does. Shizuoka kukicha, Kagoshima kukicha, and Uji kukicha can all be similar in flavor if they're from the same grade of source material. The differences are subtle.
How to brew kukicha
Kukicha is more forgiving than sencha. You can brew it at higher temperatures without it turning bitter, and you can steep it longer without extracting too much astringency. This is one of the reasons it's popular as an everyday tea.
Standard brew:
- 5 grams of kukicha
- 200 grams of filtered water at 175°F (let boiled water cool for 90 seconds)
- Steep for 2 minutes
- Strain and serve
Stronger brew (for a richer umami cup):
- 7 grams of kukicha
- 200 grams of water at 180°F
- Steep for 3 minutes
Cold brew (summer option):
- 10 grams of kukicha
- 500 grams of cold water in a jar
- Refrigerate for 6 to 8 hours
- Strain and serve over ice
Kukicha also takes milk well, though that's not traditional in Japan. A kukicha latte — similar to a matcha latte but milder and sweeter — is one of the more accessible ways to introduce it to people who are used to coffee-style drinks.
How kukicha fits in the Japanese tea world
Kukicha sits in a different category from the leaf-style Japanese teas. Sencha, gyokuro, and matcha are about the leaf and how it's grown and processed. Kukicha is about the parts that get sorted out — and what happens when those parts are brewed on their own.
It's also a tea that rewards slow drinking. The cup doesn't shout. The flavor is subtle, clean, and persistent. It's the kind of tea you can drink over the course of an hour without it getting cold or stale, and the cup stays balanced from first sip to last.
For people who find sencha too grassy or too astringent, kukicha is often the green tea that clicks. The cup is closer to what most Western tea drinkers expect from green tea — light, clean, slightly sweet — without the bitterness that sometimes comes with the leaf-style versions.
If you've been curious about Japanese green tea but haven't found one you love, kukicha is worth a try. It might be the one.
What we like about kukicha at Cozy Sips
We carry kukicha because it's the green tea we drink at home most often. The lower caffeine means we can brew a cup in the afternoon without worrying about it affecting our sleep. The clean cup means it pairs with food without competing. And the price is reasonable — kukicha is typically less expensive than gyokuro or first-flush sencha, because the source material is what's sorted out during premium tea production.
When we taste a new lot of kukicha, we're looking for a few things: a clean pale color, a brothy umami character without bitterness, and a finish that doesn't dry out the palate. Most lots we try clear these bars easily. The challenge is usually just keeping the inventory fresh — kukicha is best within 6 months of opening, and we go through it slowly.
If you've never tried kukicha, our kukicha page is the easiest place to start. Brew it at 175°F for 2 minutes, no milk, no sugar. Just the tea.
— Seraphina
P.S. If you want to compare kukicha to other Japanese green teas, we have a sencha brewing guide and a matcha origin piece on the blog. The three together cover most of what you'd want to know about leaf, powder, and stem green teas from Japan.