The culture that is Japan markets in everything

Uguisu no Fun’s main effect – that being bleaching and exfoliating the skin – is a result of Guanine, a naturally occurring enzyme found in nightingale droppings. Kabuki actors and high-ranking geisha girls have always prized it as the best way to remove their heavy makeup while leaving their high-priced skin smooth and supple.

The link with photos is here and for the pointer I thank Scott Rogers.