Kamogawa is a city located in Chiba Prefecture, Japan. As of 1 December 2020, the city had an estimated population of 31,722 in 14,558 house…Kamogawa is a city located in Chiba Prefecture, Japan. As of 1 December 2020, the city had an estimated population of 31,722 in 14,558 households and a population density of 170 persons per km². The total area of the city is 191.14 square kilometers.