Answer:
For over 15 centuries, the relationship between Japan and Korea was characterized by cultural exchanges, economic trade, political contact and military confrontations, all of which underlie their relations even today. During the ancient era, exchanges of cultures and ideas between Japan and mainland Asia were common through migration via the Korean Peninsula, and diplomatic contact and trade between the two.
Since 1945, relations involve three states: North Korea, South Korea and Japan. Japan cut off Korea from Qing Chinese suzerainty and for Japan, a high priority in the late 19th century, fighting wars with those two countries on the issue. Japan took control of Korea with the Japan-Korea Annexation Treaty of 1910. When Japan was defeated in World War II, Soviet forces took control of the North, and American forces took control of the South, with the 38th parallel as the agreed-upon dividing line. South Korea became independent as of August 15, 1945, and North Korea as of September 9, 1945. In June 1950, North Korea invaded and almost conquered South Korea, but was driven back by the United Nations command, leading South Korean, American, European and international forces. North Korea was nearly captured, with the United Nations intending to roll back Communism there.[1] However, China entered the war, pushed the UN forces out of North Korea, and a military stalemate resulted along the lines similar to the 38th parallel. An armistice was agreed on in 1953, which is still in effect, and the cease-fire line of that year remains the boundary between North and South.[2]
Diplomatic relations between Japan and South Korea were established in 1965. In the early 2000s, the Japanese–South Korean relationship soured when the Japanese Prime Minister Junichiro Koizumi visited the Yasukuni Shrine every year during his term. Furthermore, conflicts continue to exist over claims of the Liancourt Rocks (known in Korea as "Dokdo") – a group of small islets near Korean island "Ulleungdo".
Bilaterally and through the Six-Party Talks, North Korea and Japan continue to discuss the case of Japanese citizens abducted by the North Korean government during the 1970s and 1980s, although there are no existent diplomatic relations between the two; Japan does not recognize North Korea as a sovereign state.
In recent decades, disputes over history and history textbooks have soured relations between Japan and the two Koreas. The debate has exacerbated nationalist pride and animosity, as teachers and professors become soldiers in an intellectual war over events more than a half-century old or even two millennia older. Efforts to reach compromise agreements have failed. Meanwhile, a much less controversial, less politicized and more study-oriented historiography has flourished in Western nations.[3][4] In 2013, polls reported that 94% of Koreans believe Japan "Feels no regret for its past wrongdoings," while 63% of Japanese state that Korean demands for Japanese apologies are "Incomprehensible".[5]
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