Uguisu no fun (鶯の糞, literally meaning "nightingale faeces" in Japanese), also called the "Geisha Facial",[1] refers to the excrement (fun) produced by a particular nightingale, the Japanese bush warbler (uguisu).[1] The droppings have been used in facials throughout Japanese history.[1] Recently, the product has appeared in the Western world.[1] The facial is said to whiten the skin and balance skin tone,[clarification needed] as well as treat skin affected by hyperpigmentation.[2]