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 NameThe data reached an all-time hh of 1,720.033 USD bn in Dec 2011 and a record low of 5.850 USD bn in Mar 1957. Related information about Japan Gross National Product (GNP) data.