Amacha

is a Japanese herbal tea made from fermented leaves of Hydrangea macrophylla var. thunbergii. The name derives from the characters for and .

Amacha means sweet tea. This tea contains tannin and phyllodulcin, a sweetener 400–800 times sweeter than table sugar (sucrose) or 2 times sweeter than saccharin. It does not contain caffeine. The beverage is credited with antiallergic properties. It is also used in the prevention of periodontitis.