The official yosakoi dance is based on a song called "Yosakoi Naruko Dancing", written by Takemasa Eisaku. This song was created by combining elements of three songs: "Yosakoi-bushi" ("yosakoi melody"), "Yocchore" (a children's song), and "Jinma-mo" (a folk song of KÅchi Prefecture). The original competition in KÅchi requires that each team's music include some part of this original music. Competitions and festivals in other areas may not have this requirement (thus allowing teams to compose their own music), or may require that elements of different local folk songs are worked into the dance routines. Takemasa has given the copyright on "Yosakoi Naruko Dancing" to the public. Yosakoi Matsuri ("yosakoi festival") is a festival in the city of KÅchi, Japan. This is the original yosakoi festival: it has taken place every August since 1954. In this festival, teams of dancers and floats crowd to dance the yosakoi naruko dance together. The number of participants has been increasing yearly: as of 2005 over 10,000 dancers participate in this competition every year.