data japan 2023The 2025 population density in Japan is 338 people per Km2 (875 people per mi2), calculated on a total land area of 364,555 Km2 (140,755 sq. miles). Largest Cities in Japan # City NameFree and open access to global development data. Data. HOME. ECONOMIES. DATA & RESOURCES. ABOUT. Exports of goods and services (% of GDP) Japan. Close. Browse