Chino is a city located in Nagano Prefecture, Japan. As of 1 March 2019, the city had an estimated population of 55,673 in 23,236 households…Chino is a city located in Nagano Prefecture, Japan. As of 1 March 2019, the city had an estimated population of 55,673 in 23,236 households, and a population density of 210 persons per km². The total area of the city is 266.59 square kilometres.