was a town located in Higashikubiki District, Niigata Prefecture, Japan.
As of 2003, the town had an estimated population of 3,521 and a density of 50.14 persons per km<sup>2</sup>. The total area was 70.23 km<sup>2</sup>.
On January 1, 2005, Yasuzuka, along with the villages of Maki, à Âshima and Uragawara (all from Higashikubiki District), the towns of Itakura, Kakizaki, à Âgata and Yoshikawa, the villages of Kiyosato, Kubiki, Nakagà  and Sanwa (all from Nakakubiki District), and the town of Nadachi (from Nishikubiki District), was merged into the expanded city of Jà Âetsu.