Hadaka Matsuri is a Japanese festival in which the participants are all but naked. The festival is celebrated many times throughout the year in various parts of Japan and those involved usually wear a type of traditional loin cloth. Some of those involved go completely naked which is not frowned on at all - in fact it is considered healthy. The festivals often involve the use of mud (for entertainment) and there are often separate women’s and men’s festivals. In some towns special festivals are held for children - as a rite of passage, but sometimes children participate in the adult festival. The festival has its origins as a religious event, but these days the religious aspects are virtually forgotten.
