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 km<sup>2</sup>. The total area was 33.94 km<sup>2</sup>.
On January 1, 2006, Yasaka, along with the village of Miasa (also from Kitaazumi District), was merged into the expanded city of à Âmachi.