Masubuchi-en possesses its own tea field in Shirakawa village surrounded by an outstanding natural environment, where a beautiful, clean stream flows through a valley. The company has built a consistent system of cultivation, manufacturing process, and retailing. By introducing a “far-infrared roasting” process, we have succeeded in heating tea leaves slowly from inside to extract umami and sweetness, resulting in the deep, rich taste of Mino Shirakawa tea.