Tsukuba, Ibaraki is a city in Ibaraki Prefecture, Japan. It is known as the location of the Tsukuba Science City, a planned city developed in the 1960s. As of October 1, 2012, the city has an estimated population of 217,315, with 90,151 households and a population density of 765 persons per km². Its total area is 284.07 km². Mount Tsukuba, particularly well known for its toad-shaped Shinto shrine, is located near the city.