Gyokuro is a premium Japanese green tea grown under shade for several weeks before harvest, resulting in unusually high levels of amino acids and deep umami flavor. It is famous not simply because it is expensive, but because careful shading and low-temperature brewing reveal a sweetness that ordinary green tea rarely reaches. Quick Summary: Gyokuro is a shade-grown Japanese green tea prized for its concentrated umami, low bitterness, and silky texture. It is brewed slowly at low temperatures and enjoyed in small cups. Why Shade Changes Everything About 20–30 days before harvest, tea gardens for gyokuro are covered to ...