Tsuchiura is a city in Ibaraki Prefecture, Japan. As of 1 January 2024, the city has an estimated population of 142,181 people in 66,629 households, and a population density of 1,157 persons per squate kilometre. The proportion of the population aged over 65 was 29.7%. The total area of the city is 122.89 square kilometres (47.45 sq mi). About 3,000 residents are non-Japanese, a large proportion …