, ▁replacing ▁acting ▁president ▁H w ang ▁K yo - ahn . ▁ ▁Legisl ative ▁branch ▁ ▁The ▁National ▁Assembly ▁( , ▁, ▁gu k ho e ) ▁has ▁ 3 0 0 ▁members , ▁elected ▁for ▁a ▁four - year ▁term , ▁ 2 5 3 ▁members ▁in ▁single - se at ▁constitu encies ▁and ▁ 4 7 ▁members ▁by ▁proportional ▁representation . ▁The ▁r uling ▁Democratic ▁Party ▁of ▁Korea ▁is ▁the ▁largest ▁party ▁in ▁the ▁Assembly . ▁ ▁Jud icial ▁branch ▁The ▁South ▁Korean ▁jud ici ary ▁is ▁independent ▁of ▁the ▁other ▁two ▁branches . ▁The ▁highest ▁jud ici ary ▁body ▁is ▁the ▁Supreme ▁Court , ▁whose ▁just ices ▁are ▁appointed ▁by ▁the ▁president ▁with ▁the ▁consent ▁of ▁the ▁National ▁Assembly . ▁In ▁addition , ▁the ▁Constitution al ▁Court ▁over se es ▁questions ▁of ▁constitution ality . ▁South ▁Korea ▁has ▁not ▁accepted ▁comp uls ory ▁IC J ▁juris diction . ▁ ▁Political ▁parties ▁and ▁elections ▁ ▁South ▁Korea ▁elect s ▁on ▁national ▁level ▁a ▁head ▁of ▁state ▁– ▁the ▁president ▁– ▁and ▁a ▁legisl ature . ▁The ▁president ▁is ▁elected ▁for ▁a ▁five - year ▁term ▁by ▁the ▁people . ▁The ▁National ▁Assembly ▁( G uk ho e ) ▁has ▁ 3 0 0 ▁members , ▁elected ▁for ▁a ▁four - year ▁term , ▁ 2 5 3 ▁members ▁in ▁single - se at ▁constitu encies ▁and ▁ 4 7 ▁members ▁by ▁proportional ▁representation . ▁ ▁The ▁main ▁two ▁political ▁parties ▁in ▁South ▁Korea ▁are ▁the ▁liberal ▁Democratic ▁Party ▁of ▁Korea