South Korea is a developed country in East Asia with the highest credit rating of any country there.
A developed country , industrialized country , more developed country , or `` more economically developed country '' ( MEDC ) , is a sovereign state that has a highly developed economy and advanced technological infrastructure relative to other less industrialized nations . South Korea . Today , it is the world 's seventh largest advanced economy and fifth largest exporter with the G20 's largest budget surplus and highest credit rating of any country in East Asia .