Nangai, Akita

 was a village located in Senboku District, Akita Prefecture, Japan.
In 2003, the village had an estimated population of 4,529 and a density of 45.82 persons per km². The total area was 98.85 km².
On March 22, 2005, Nangai, along with the city of Ōmagari; and the towns of Kamioka, Kyōwa, Nakasen, Nishisenboku, Ōta and Semboku (all from Senboku District), merged to create the city of Daisen.