I followed Pendleton's links and did some research on the KBO for everyone who wants the skinny.
The league began in 1982 and has 10 teams but no divisions, with teams facing off 16 times each for a 144-game regular season. The level of talent is supposed to be somewhere in between Double-A and Triple-A.
I like their playoff format. The fourth- and fifth-place teams face off in a Wild Card round, with the winner advancing to play the third-place team (best-of-five series). The winner of that then faces the second-place team in the semifinals (best-of-five). Finally, the semifinal winner faces the regular season champion in the Korean Series (best-of-seven). Translation: Winning the regular season is huge[/].
The teams:
1. Doosan Bears (reigning champs)
Year established: 1982
City: Seoul
Korean Series: 6 championships, 7 runners-up
MLB comparison → Yankees (very successful, located in largest city)
2. Hanwha Eagles
Year established: 1985
City: Daejeon
Korean Series: 1 championship, 5 runners-up
MLB comparison → Orioles (currently rebuilding, beautiful ballpark)
3. Kia Tigers
Year established: 1982
City: Gwangju
Korean Series: 11 championships, 0 runners-up (Jordan-esque!)
MLB comparison → Cardinals (storied franchise, white and red color scheme)
4. Kiwoom Heroes
Year established: 2008
City: Seoul
Korean Series: 0 championships, 2 runners-up
MLB comparison → Rays (low payroll, roofed stadium)
5. KT Wiz
Year established: 2013
City: Suwon
Korean Series: N/A
MLB comparison → Padres (expansion team, no titles, larger city to the north)
6. LG Twins
Year established: 1982
City: Seoul
Korean Series: 2 championships, 4 runners-up
MLB comparison → Angels/Mets (second most popular team in big city)
7. Lotte Giants
Year established: 1975
City: Busan
Korean Series: 2 championships, 3 runners-up
MLB comparison → Cubs (rich history, strong fan support, not as successful as you'd expect)
8. NC Dinos
Year established: 2011
City: Changwon
Korean Series: 0 championships, 1 runner-up
MLB comparison → Brewers (Eric Thames played for both, on the rise)
9. Samsung Lions
Year established: 1982
City: Daegu
Korean Series: 8 championships, 10 runners-up
MLB comparison → Giants (won most titles last decade, struggling lately)
10. SK Wyverns
Year established: 2000
City: Incheon
Korean Series: 4 championships, 4 runners-up
MLB comparison → Red Sox (perennial contenders, lost biggest star in offseason)
And, hell, I might tune in for the bat flips alone: