thumb|former Yasaka village hall
was a village located in Kitaazumi District, Nagano Prefecture, Japan.
As of 2003, the village had an estimated population of 1,199 and a density of 35.33 persons per km2. The total area was 33.94 km2.
On January 1, 2006, Yasaka, along with the village of Miasa (also from Kitaazumi District), was merged into the expanded city of Ōmachi.[1]