CIAの見解（the world factbook) (※2005年くらい)

Egypt
https://www.cia.gov/library/publications/the-world-factbook/geos/eg.html
Independence:
28 February 1922 (from UK protectorate status; the revolution that began on 23 July 1952 led to a
republic being declared on 18 June 1953 and all British troops withdrawn on 18 June 1956);
note - it was ca. 3200 B.C. that the Two Lands of Upper (southern) and Lower (northern) Egypt were
first united politically

日本
https://www.cia.gov/library/publications/the-world-factbook/geos/ja.html
Independence:
3 May 1947 (current constitution adopted as amendment to Meiji Constitution);
notable earlier dates: 660 B.C. (traditional date of the founding of the nation by Emperor JIMMU);
29 November 1890 (Meiji Constitution provides for constitutional monarchy)

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)

-----------------------------------------------------奇形国家の絶対に超えられない壁ｗ
韓国
https://www.cia.gov/library/publications/the-world-factbook/geos/ks.html
Independence: 15 August 1945 (from Japan)