Founded in 1947 and achieving its modern form in 1994, Osada Seicha pride themselves on promoting organic tea production in the mountains of Tenryu, Shizuoka. For 35 years, they have developed close ties with famers in the Isagawa valley region and work with them and other farmers and farmer cooperatives to produce high-quality organic tea. Due the small scale and remoted location of these mountain farms, they cannot refine and process tea by themselves, so Osada seicha completes the final finishing or shiage (仕上げ) of these teas.