Minamisanriku is a town in Miyagi Prefecture, Japan. As of 1 May 2020, it had an estimated population of 12,516, and a population density of 77 persons per km2 in 4504 households. The total area of the town is 163.40 square kilometres. It is a resort town on a coastline of wooded islands and mountainous inlets, large sections of which suffered from damage due to the 2011 Tōhoku earthquake and tsunami.