es. The cities are populated by young people, while the median age in rural areas becomes progressively higher (Cumings 71).
Large numbers of Koreans emigrated before World War II: those from northern Korea to Manchuria, and those from southern Korea to Japan. It is estimated that in 1945 some two million Koreans lived in Manchuria and Siberia and about the same number in Japan. About half of the Koreans in Japan returned to South Korea just after 1945. The most important migration, however, was the north-to-south movement of people after World War II, especially the movement that occurred during and after the Korean War. About two million people migrated to South Korea from the North during that period, settling largely in the major cities. In addition to creating large resident populations in China and Japan, Koreans have emigrated to many other countries, notably the United States and Canada (Cumings 73).
South Korea, like North Korea, is one of the most ethnically homogeneous countries in the world
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