Complex sentence: It wasn't until 1982 when South Korea became just the second team to win the title in 8 attempts, and between 1969 and 2007, Japan and Korea were the only victors of the competition.
Split into simpler sentences: It wasn't until 1982 that South Korea became the second team to win the title. Between 1969 and 2007, Japan and Korea were the only winners of the competition.