The population of Japan was 60 million in 1925, 73 million in 1940, 72 million after the war in 1945, 128 million in 2010, then dropped to 126 million in 2020, and further declined to 123 million in 2025. The falling birth rate has been the primary reason for the decline, but the economy, earthquake / tsunami / Fukushima nuclear disaster and COVID Pandemic also contributed.   In 2024, 60 countries/sites, yes, 60, had a drop in population.   Spain  -0.02% Thailand  -.06% South Korea  -0.08% Greenland -0.16% China  -0.22% Italy  -0.31% Germany  -.0.34% Cuba  -0.38% Taiwan  -0.43% Japan  -0.51% Russia  -.053% Greece  -1.77% Saint Martin -4.92% The U.S. population is projected to increase from 342 million in 2024 to a peak of 370 million in 2080, then drop to 366 million in 2100. The two main population centers in Japan are Kanto (Tokyo, Yokohama, etc.) Province with 43.7 million and Kansai (Osaka, Kyoto, etc.) Provi...