In Japanese mythology "Otohime" is a goddess of the sea, the daughter of the king of the seas. She married, and after giving birth to a son, turned into a dragon.
The modern day Otohime, or "Sound Princess" is a popular gadget in Japan that mimics the sound of flushing to disguise any embarassing noises without actually having to flush and unnecessarily waste water. It's made by Toto, makers of the king of toilets, the Neorest. While the Otohime has been around since 1988, it's become much more popular in recent years, popping up in public restrooms everywhere. It is, however, only seen in women's bathrooms.
From AP, via Yahoo.
Check out more of Toto's bathroom products (in Japanese).