Ōshū is a city located in Iwate Prefecture, Japan. As of 30 April 2020, the city had an estimated population of 114,620 and a population density of 120 persons per km2 in 45,728 households. The total area of the city is 993.30 square kilometres. Ōshū is famous for its Maesawa Beef, numerous festivals, historic temples and shrines and Fujiwara no Sato, a theme park and movie lot based on the exploits of the Northern Fujiwaras in the 12th century.