Maebashi is the capital city of Gunma Prefecture, in the northern Kantō region of Japan. As of 31 August 2020, the city had an estimated population of 335,352 in 151,171 households, and a population density of 1100 persons per km2. The total area of the city is 311.59 km2. It was the most populous city within Gunma Prefecture until Takasaki merged with nearby towns between 2006 and 2009.