Foreign relations of South Korea
On January 18, 1952 The first president of South Korea Syngman Rhee declared that the vicinity of Dokdo was a territory of South Korea (Syngman Rhee line). Subsequently, some 3,000 Japanese fishermen who conducted fishery operations in this vicinity were captured. This incident, called the Dai Ichi Daihoumaru Ship case strained relations between South Korea and Japan.
List of leaders of North Korea
The Constitution of North Korea has recognized the title "Supreme Leader" since 2009, when the Chairman of the National Defence Commission was formally designated as "the Supreme Leader of the Democratic People's Republic of Korea" (Korean: 조선민주주의인민공화국의 최고 지도자). It was slightly amended in 2012, with "Chairman" replaced by "First Chairman." It was further amended in 2016 to reflect the replacement of the NDC with the State Affairs Commission.Kim Jong-il died on 17 December 2011, but has since been posthumously named the "Eternal General Secretary". Thus his son and successor as leader, Kim Jong-un, was not given the title of General Secretary.