Every year the Japanese come to town yotsukaido close to Tokyo to take part in the "dirty rite." Since ancient times, it has become a tradition that the festival is attended only by men. It opens with a very original ceremony. Representatives of the stronger sex, which put on a loincloth, thrown into a pit of mud. So they, among other things, pray for a good harvest and the health of infants. The holiday is a kind of Hadaka Matsuri festival, or the festival of naked men - one of Japan's most famous festivals, which takes place in various Japanese prefectures with their variations.