24 Jul 1988
Kim Yong-kang beats Sot Chitalada via unanimous decision 12/12
Flyweight (112 lb)
Kim Yong-kang becomes the RING and WBC Flyweight world champion
12 Nov 1988
Kim Yong-kang beats Emil Romano via unanimous decision 12/12
5 Mar 1989
Kim Yong-kang beats Leopard Tamakuma via unanimous decision 12/12
3 Jun 1989
Sot Chitalada beats Kim Yong-kang via split decision 12/12
1 Apr 1990
Kim Yong-kang's RING Flyweight world title reign ends
29 Sep 1990
Khaosai Galaxy beats Kim Yong-kang via knockout 6/12
Super Flyweight (115 lb)
1 Jun 1991
Kim Yong-kang beats Elvis Alvarez via unanimous decision 12/12
Kim Yong-kang becomes the WBA Flyweight world champion
5 Oct 1991
Kim Yong-kang beats Leo Gamez via unanimous decision 12/12
24 Mar 1992
Kim Yong-kang beats Jon Penalosa via knockout 6/12
26 Sep 1992
Aquiles Guzman beats Kim Yong-kang via unanimous decision 12/12
25 Sep 1994
Somchai Chertchai beats Kim Yong-kang via unanimous decision 12/12