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Population density (people per km 2) by country. This is a list of countries and dependencies ranked by population density, sorted by inhabitants per square kilometre or square mile. The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1.
Japan's population density was 336 people per square kilometer as of 2014 (874 people per square mile) according to World Development Indicators. It ranks 44th in a list of countries by population density. Between 1955 and 1989, land prices in the six largest cities increased by 15,000% (+12% per year compound).
Using the "One Metropolis Three Prefectures" definition, Tokyo is 13,555.65 square kilometres (5,233.87 sq mi), a similar size to that of Los Angeles County, and almost two-thirds smaller than the combined statistical area of New York City, at 30,671 square kilometres (11,842 sq mi) and 21.9 million people.
The population, population density and land area for the cities listed are based on the entire city proper, the defined boundary or border of a city or the city limits of the city. The population density of the cities listed is based on the average number of people living per square kilometer or per square mile.
Japan has a population of over 123 million as of 2025, making it the eleventh-most populous country. The capital of Japan and its largest city is Tokyo; the Greater Tokyo Area is the largest metropolitan area in the world, with more than 37 million inhabitants as of 2024. Japan is divided into 47 administrative prefectures and eight traditional ...
Tokyo Prefecture is the most populous prefecture and the densest, with 6,100 inhabitants per square kilometer (16,000/sq mi); by geographic area it is the third-smallest, above only Osaka and Kagawa. Its administrative structure is similar to that of Japan's other prefectures.
Population density is the number of people per unit of area, usually transcribed as "per square kilometer" or square mile, and which may include or exclude, for example, areas of water or glaciers. Commonly this is calculated for a county, city, country, another territory or the entire world.
Dymaxion map of the world with the 30 largest countries and territories by area. This is a list of the world's countries and their dependencies, ranked by total area, including land and water.