March 3rd is a holiday just for girls! There's also one for boys on May 5th. Learn all about it! Hinamatsuri traces its origins to a Heian period custom called hina-nagashi (雛流し"doll floating") in which straw hina dolls are set afloat on a boat and sent down a river to the sea, supposedly taking troubles or bad spirits with them. The Shimogamo Shrine (part of the Kamo Shrine complex in Kyoto) celebrates the Nagashi-bina by floating these dolls between the Takano and Kamo Rivers to pray for the safety of children. People have stopped doing this now because of fishermen catching the dolls in their nets. They now send them out to sea, and when the spectators are gone they take the boats out of the water and bring them back to the temple and burn them. The customary drink for the festival is shirozake, a sake made from fermented rice.