Matsudo is a city in Chiba Prefecture, Japan. As of 1 October 2024, the city had an estimated population of 499,533 in 242,918 households a…Matsudo is a city in Chiba Prefecture, Japan. As of 1 October 2024, the city had an estimated population of 499,533 in 242,918 households and a population density of 8,138 persons per km². The total area of the city is 61.38 square kilometres.