Tokyo Population Density 2025 By City. This map emphasizes areas with the highest population density (more than 30,000 persons per square kilometer). The 2025 population density in japan is 339 people per km 2 (879 people per mi 2), calculated on a total land area of 364,555 km2 (140,755 sq.

Another japanese city, osaka, also has a very large population of. Number of people living in the capital city;