Kadena is a town located in Nakagami District, Okinawa Prefecture, Japan. As of October 2016, the town had an estimated population of 13,671 and a density of 910 persons per km². The total area is 15.04 square kilometres. Approximately 85% of the town is controlled by the US Government including Kadena Air Base, the second-largest base in t…Kadena is a town located in Nakagami District, Okinawa Prefecture, Japan. As of October 2016, the town had an estimated population of 13,671 and a density of 910 persons per km². The total area is 15.04 square kilometres. Approximately 85% of the town is controlled by the US Government including Kadena Air Base, the second-largest base in the United States Air Force.