he two basic rules state that the participating teams have to use Yosakoi Naruko Odori Uta, or the dancing song, which is based on "Yosakoi Bushi," the traditional local folk tunes and that all the dancers have to perform while holding clappers, which make a sound similar to castanets. Teams are free to wear whatever costumes they like and any style of dancing is allowed. Participants always come up with new ideas and every year each team displays great originality. Young people have begun supplementing the traditional ways of playing the music, and in recent years live performances by rock bands have become popular among young dancers. Spectators can enjoy a variety of colorful costumes and music that is presented not only in traditional arrangements, but also spiced with rock, samba, or reggae.