Jōsō is a city located in Ibaraki Prefecture, Japan. As of 1 October 2020, the city had an estimated population of 59,314 in 21,168 households and a population density of 480 persons per km2. The percentage of the population aged over 65 was 38.8%. The total area of the city is 123.64 square kilometres. The city has a large expatriate population from Brazil.