Ōkuwa (大桑村, Ōkuwa-mura) is a village located in Nagano Prefecture, Japan.

The total area of the village is 234.47 square kilometres (90.53 sq mi).

The average annual rainfall is 1680 mm with September as the wettest month.

[2] Per Japanese census data,[3] the population of Ōkuwa has decreased over the past 60 years.

The area of present-day Ōkuwa was part of ancient Shinano Province.