was a town located in Senboku District, Akita Prefecture, Japan. In 2003, the town had an estimated population of 5,943 and a density of 169.03 persons per km². The total area was 35.16 km². On March 22, 2005, Kamioka, along with the city of Ōmagari; the towns of Kyōwa, Nakasen, Nishisenboku, Ōta and Semboku; and the village of Nangai (all from Senboku District), merged to create the city of Daisen. External links Daisen official website Dissolved municipalities of Akita Prefecture Daisen, Akita