Komagane is a city located in Nagano Prefecture, Japan. As of 1 February 2019, the city had an estimated population of 32,210 in 12,937 house…Komagane is a city located in Nagano Prefecture, Japan. As of 1 February 2019, the city had an estimated population of 32,210 in 12,937 households, and a population density of 190 persons per km². The total area of the city is 165.86 square kilometres.
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