data japan 2024According to the Japan Automotive Dealers Association and Japan Lht Motor Vehicle and Motorcycle Association, sales in Japan in April 2025 increased 10.5% to 342,876 units. ... Apr.The 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 Name