Naka is a city located in Ibaraki Prefecture, Japan. As of 1 July 2020, the city had an estimated population of 53,153 in 20,953 households an…Naka is a city located in Ibaraki Prefecture, Japan. As of 1 July 2020, the city had an estimated population of 53,153 in 20,953 households and a population density of 543.4 persons per km². The percentage of the population aged over 65 was 32.4%. The total area of the city is 97.82 square kilometres.