 After returning to Korea, Kim remained as an Ambassador-at-Large at the Ministry of Foreign Affairs until April 8, 1986.He later launched into politics and was elected in 1988 as a member of the 13th National Assembly from Democratic Justice Party (DJP), then ruling party of South Korea which merged with the Unification Democratic Party (UDP) and New Democratic Republican Party (RP) to form the new Democratic Liberal Party (later New Korea Party) in 1990.Kim Chong-kon married Kim Sang-jo (), with whom he has three sons