There are two styles of toilets commonly found in Japan.The oldest type is a simple squat toilet, which is still common in public conveniences. After World War II, modern Western-type flush toilets and urinals became common. The current state of the art for Western-style toilets is the bidet toilet, which, as of 2004, are installed in more than half of Japanese households. In Japan, these bidets are commonly called Washlets , a brand name of Toto Ltd., and include many advanced features rarely seen outside of Asia. Depending on the exact model, these bidets are designed to open the lid when they sense a user nearby, wash the anus or vulva of the user (including a number of pulsating and massaging functions), dry afterwards with warm air, flush automatically and close the lid after use.