Takamatsu is a capital city located in Kagawa Prefecture, Japan. As of 1 November 2022, the city had an estimated population of 414,134 in 1…Takamatsu is a capital city located in Kagawa Prefecture, Japan. As of 1 November 2022, the city had an estimated population of 414,134 in 190,120 households and a population density of 1,100 persons per km². The total area of the city is 375.41 square kilometres. It is the capital city of the prefecture.