was a town located in Niihari District, Ibaraki Prefecture, Japan. As of 2003, the town had an estimated population of 30,218 and a density of 196.50 persons per km². The total area was 153.78 km². On October 1, 2005, Yasato was merged into the expanded city of Ishioka. External links Ishioka official website Dissolved municipalities of Ibaraki Prefecture Ishioka, Ibaraki