Tsukuba

is a city located in Ibaraki Prefecture, Japan. As of July 1, 2020, the city had an estimated population of 244,528 in 108,669 households and a population density of 862 persons per km². The percentage of the population aged over 65 was 20.3%. The total area of the city is . It is known as the location of the , a planned science park developed in the 1960s. Geography Tsukuba is located in southern Ibaraki Prefecture, approximately 50 kilometers from central Tokyo and about 40 kilometers from Narita International Airport. Mount Tsukuba, from which the city takes its name, is located in the northern part of the city. Except for the area around Mount Tsukuba, the city is a part of the Kantō Plain with an altitude of 20 to 30 meters. Mountains: Mount Tsukuba, Mount Hokyo. Rivers: Kokai River, Sakura River, Higashiyata River, Nishiyata River, Ono River, Hanamuro River, Inari River.