Halla-san is a volcano in this nation's southernmo
Halla-san is a volcano in this nation's southernmost province, the island of Jeju. This country plans to move government facilities to a new "special autonomous city," Sejong. This country's largest port, north of Tsushima Island, is the southern city of (*) Busan, while the northern city of Incheon is near a de-militarized zone crossing the 38th Parallel. For 10 points, name this peninsular Asian nation with capital Seoul.
Halla-san is a volcano in this nation's southernmost province, the island of Jeju.
South Korea (accept Republic of Korea; accept Han'guk or Taehan-min'guk; prompt on Korea before "nation;" do not accept Democratic People's Republic of Korea)