Katsuura is a city located in Chiba Prefecture, Japan. As of 30 November 2020, the city had an estimated population of 16,872 in 8566 househ…Katsuura is a city located in Chiba Prefecture, Japan. As of 30 November 2020, the city had an estimated population of 16,872 in 8566 households and a population density of 180 persons per km². The total area of the city is 94.20 square kilometres. Katsuura City is famous for Katsuura Fishing Port, which features one of the top three largest morning markets in Japan.