https://open.substack.com/pub/sankomatcha/p/uji-no-matcha-the-inconvenient-truth?r=3mxquk&utm_campaign=post&utm_medium=web

It started with the disturbing realization that almost all Uji Matcha sold is not grown or processed in Uji at all. We kept hearing different definitions from different people: is it a city? Region? Blending style? Four-prefecture trademark?
When we crunched the math from official Japanese sources, the percentage of tencha that’s actually grown in Uji that can be sold as “Uji Matcha” or an “Uji Matcha Blend” is probably less than 1-2% of Uji Matcha sold.
This series details:
-Hard numbers / Production statistics
-Was “Uji Matcha” ever single origin?
-The context and creation of the “Uji Matcha” trademark
-Does terroir actually matter for matcha?
-Who the current system helps and hurts

Cohosts Ryan and Zongjun (Sam) discuss their experience in Nishio, Aichi including learning about pest control techniques, unique tana-shelf shading structures of Aichi, differences between a Mikawa and Horii Style tencha oven, high efficiency "simple" or "net-type" tencha driers, and their experience milling tencha on Sanko Usu One.

Cohosts Ryan and Zongjun (Sam) discuss their learning journey hand picking tea for 3 days in Toyota, Aichi. They discuss tencha processing (including a unique withering step this producer uses which produces an almost baozhong-like fragrance), ishi usu stone milling, and fertilizing practices.