Motoyoshi (本吉郡 Motoyoshi-gun?) is a district located in Miyagi Prefecture, Japan.
As of the Karakuwa merger but with 2010 population estimates, the district has an estimated population of 17,296 and a population density of 106 persons per km². The total area is 163.74 km².
Motoyoshi District was devastated by the magnitude 9.0 March 11, 2011 earthquake and tsunami which occurred off the coast of Japan; an estimated 9,500 people are reported missing from the town of Minamisanriku alone. Early estimates indicate that this could represent as much as 90% of the total casualties in Japan.
Coordinates: 38°41′46″N 141°27′07″E / 38.696°N 141.452°E