thumb|Map of Namiai, Nagano
was a village located in Shimoina District, Nagano Prefecture, Japan.
As of 2003, the village had an estimated population of 766 and a density of 13.38 persons per km<sup>2</sup>. The total area was 57.24 km<sup>2</sup>.
On January 1, 2006, Namiai was merged into the expanded village of Achi.