The South Korean football league system contains three unconnected leagues for Korean football clubs. The Korean system is different from many other national league systems, in the sense that there is no official direct route for movement between any of the three divisions.
The highest level of football in South Korea is the K-League, the only fully professional football league in the country. Below the level of the K-League is the semi-professional National League, which serves as the second division. A third level is the amateur K3 League, was added to the setup in 2007.
At present there is no avenue for progression between any of the leagues. In 2006 and 2007, the champions of the National League had been eligible for entry to the K-League provided they met certain criteria. Both Goyang Kookmin Bank and Ulsan Hyundai Mipo Dolphin FC, who won the league in 2006 and 2007 respectively, refused the chance to move up to the K-League. In light of those rejections, the National League discontinued the conditional promotion system ahead of the 2008 season.