Kawaguchi

Kawaguchi is a city located in southeastern Saitama Prefecture, Japan. As of 1 April 2025, the city had an estimated population of 595,011 in 293,582 households and a population density of 9605 persons per km2. The total area of the city is 61.95 square kilometres (23.92 sq mi). It is the Greater Tokyo Area's 8th most populated city, and second largest in Saitama Prefecture, after eponymous Saitama.Wikipedia

Saitama is the capital and largest city of Saitama Prefecture, Japan. Its area incorporates the former cities of Urawa, Ōmiya, Yono and Iwatsuki. It is a city designated by government ordinance. As of 1 February 2021, the city had an estimated population of 1,324,854, and a population density of 6,093 people per km2.Wikipedia