Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Uguisu no fun , which literally means nightingale feces in Japanese, refers to the excrement (fun) produced by a particular nightingale called the Japanese bush warbler (Cettia diphone) (uguisu). The droppings have been used in facials since ancient Japanese times. Recently, the product has been used in the Western world. This facial has been referred to as the Geisha Facial . The facial is supposed to lighten the skin and balance skin tones that have acne or sun damage.The use of nightingale excrement dates back to the Heian period (A.D. 794 1185) where it was introduced to the Japanese by the Koreans. The Koreans used the guano to remove dye from kimono fabric which allowed them to make intricate designs on the clothing. The Japanese used the bird droppings to remove stains from silk garments, like kimonos. Then, during the Edo period (A.D. 1603 1868),the Japanese expanded the use by using it as a beauty treatment.