This festival focuses on the mythical character Kappa. Thousands of people dancing to the "Kappa Bayashi" song, stalls on the sides of the road, various events on the stages. Held on the east side of Ushiku Station.
If you decide to go, be sure to bring along the lyrics to the Kappa Bayashi song!
http://www.ushikukankou.com/matsuri_kappa24th.htm (in Japanese)