Namiai (浪合村 Namiai-mura) was a village located in Shimoina District, Nagano, Japan.
On January 1, 2006, Namiai was merged into the village of Achi.
As of 2003, the village had an estimated population of 766 and a density of 13.38 persons per km². The total area was 57.24 km².
Namiai is host to the Nagano-Namiai Camp: http://www.campnamiai.com/