Japan has some of the best green tea. Below is a map of all the prefectures of Japan.
When you buy quality Japan Green Tea you can check out the map to see where exactly the green tea was grown.
Japan's riviera, Shizuoka Prefecture is located along the Pacific coast in the south of the Chubu Region. Mount Fuji and the Izu Peninsula are part of Shizuoka Prefecture. Tea is the prefecture's most famous product.
Uji, which is in the Kyoto Prefecture, is also highly regarded for tea.

Drinking: Japanese Sencha Green Tea