Nakasen, Akita

 was a town located in Senboku District, Akita Prefecture, Japan.
In 2003, the town had an estimated population of 11,486 and a density of 145.54 persons per km². The total area was 78.92 km².
On March 22, 2005, Nakasen, along with the city of Ōmagari; the towns of Kamioka, Kyōwa, Nishisenboku, Ōta and Semboku; and the village of Nangai (all from Senboku District), merged to create the city of Daisen.
The town's annual festival, the "Don Pan Matsuri", is held each summer and features a communal dance. The municipal clock plays the tune associated with the festival several times daily.