Yosakoi originated in Kochi City on the island of Shikoku and was originally based on the Bon-Odori dance. It is comprised of a group of dancers performing a choreographed routine. In Yosakoi dance, synchronization is the most important aspect in judging. Recently, it has taken on a more up-tempo style with more active routines than the smooth, gentle rhythms of the Bon-Odori. Dancers use Naruko (wooden clappers) and sometime small symbols. Each group will also have at least one flag bearer waving a huge flag on a long metal or bamboo pole in time with the music.

The literal translation of Yosakoi means "Come at Night". The annual festival in Kochi City, lasts for four days and has about 130 dance groups and about 15,000 dancers.

2005 marks only the fifth annual edition of the festival in Misawa. Participants come in all ages and there can be from about 20 to over 100 dancers in a group. Costumes are colorful and versatile with dancers sometimes unclasping hidden fasteners to change their look during the routine. Teams come to Misawa from all over northern Honshu and Hokkaido.

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