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...

  There are two major metropolitan regions in Japan. Kanto Means East of the Barrier, the Hakone checkpoint. Essentially, Greater Tokyo. Two watershed moments. The Great Kanto Earthquake of 1923, which killed more than 100,000. Operation Coronet, the proposed land invasion of the Kanto plain during the latter part of World War II...which did not occur because the Atomic Bombs over Hiroshima and Nagasaki convinced Japan to surrender. Had a population of 43.23 million in 2019.  Was around 11 million in 1920. Kansai Means West of the toll gate, and was the center of feudal Japan.   Sometimes also called the Kinki region. But this second name has been less and less used because of the English word kinky, or perverted.  In 2016 Kinki University changed its English name to Kindai University.  Earlier, Kinki Nippon Railway Company became Kintetsu Railway in 2003, then Kintetsu Corporation in 2015. Includes Lake Biwa, the largest freshwater lake in the country. Maj...