Hirosaki is a city located in western Aomori Prefecture, Japan. As of 1 February 2023, the city had an estimated population of 163,639 in 71…Hirosaki is a city located in western Aomori Prefecture, Japan. As of 1 February 2023, the city had an estimated population of 163,639 in 71,044 households, and a population density of 310 per square kilometre. The total area of the city is 524.20 square kilometers.