1. What is kukicha?
Kukicha(茎茶) is a by-product in the process of making final sencha, tamaryokucha, or gyokuro tea products.
To make final tea products, crude tea is dried further to reduce moisture.
Then tea stalk separator separates stems and small particle leaves from leaves. In Japanese, we call them demono(出物).
Examples of demono are kukicha(茎茶), mecha(芽茶), and konacha(粉茶).
For kukicha, In general, karigane(雁が音) and shiraore(白折) are called high-grade stem tea separated from high-grade gyokuro and sencha products.
Meanwhile, we learned at the Japanese Tea Marathon that people call stem tea differently by region.
For example, one Yame farmer calls gyokuro stem tea ‘kukicha’, while one Kagoshima farmer calls high-grade gyokuro stem tea ‘karigane’.
All names below are used to call stem tea (twig tea).
2. How is stem different from leaf?
Ethylamine is decomposed into other chemical components and used to create catechins.
The stem is less exposed to sunlight and preserves theanine and creates fewer catechines than the leaf.
The following picture is the comparison of chemical components(content %) by leaf position and stem.
1 tip 2 leaves(一芯二葉) is regarded as high-quality Japanese tea material.