Tsubame is a city located in Niigata Prefecture, Japan. As of 1 July 2019, the city had an estimated population of 77,382 in 29,406 households…Tsubame is a city located in Niigata Prefecture, Japan. As of 1 July 2019, the city had an estimated population of 77,382 in 29,406 households, and a population density of 697 persons per km². The total area of the city was 110.96 km².
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