K League 1

The sixteen member clubs play each other twice in the regular season giving a total of 30 matches. The top six sides at the end of the regular season will enter the championship playoffs, which decide final standings of the season among the six. In the first two matches, the third-placed team will face the sixth-placed team and the fourth-placed team will face the fifth-placed team, with the two winners then playing off for the right to face the second-placed team. The winner of that match will then progress to the two-legged championship playoff final where the first-placed side lie in wait, with the overall winner of the home and away series being crowned champions for 2009.