Tsukubamirai is a city situated in the Ibaraki Prefecture of Japan. It covers a total land area of 79.16 square kilometers (approximately 30.56 square miles).
As of October 1, 2020, the city had an estimated population of 51,035 residents living in 20,030 households. The population density is recorded at 645 persons per square kilometer, with approximately 26.3% of the population aged 65 or older.