North Korea, some 4
             million immigrants have crossed the border to South Korea. This increase has
             been partly offset by emigration from South Korea, especially to Japan and the
             The country's chief industrial center is Seoul (population, 1990,
             10,612,577). Other major cities include Pusan (3,798,113), the principal
             seaport; Taegu (2,229,040), center of the silk industry; Inch'Ôn (1,817,919),
             the major port on the Yellow Sea; and Kwangju (1,139,003), an ancient commercial
             South Korea's economy, traditionally based on agriculture, has, since
             the early 1960s, undergone an extraordinarily rapid industrializati
             ...