Hitachi (日立市, Hitachi-shi) is a city located in Ibaraki Prefecture, Japan. As of 1 July 2020, the city had an estimated population of 174,219 in 78,209 households and a population density of 770 persons per km2. The percentage of the population aged over 65 was 32.7%. The total area of the city is 225.71 square kilometres (87.15 sq mi). Hitachi is well known in the world for its brand name of electric products, including power plants and appliances, of the Hitachi company founded in the town in 1910 by Namihei Odaira with considerable properties as its factories in the city.