CIA (World Fact Book) 日本ttps://www.cia.gov/library/publications/the-world-factbook/geos/ja.html Independence:660 B.C. (traditional founding by Emperor JIMMU)
中国https://www.cia.gov/library/publications/the-world-factbook/geos/ch.html Independence:221 BC (unification under the Qin or Ch'in Dynasty); 1 January 1912 (Manchu Dynasty replaced by a Republic); 1 October 1949 (People's Rep ublic established)
韓国https://www.cia.gov/library/publications/the-world-factbook/geos/ks.html Independence: 15 August 1945 (from Japan)