Date of birth
April 4, 1969
April 18, 1992 in Seoul, South Korea, knocked out Rodrigo"Boy Lou"Pérez in four rounds.
Won The World Title
On August 29, 1998 in Seoul, he won a decision against Gerry Penalosa and seized the World Boxing Council's super flyweight belt.
Lost His Title
In his sixth defense, on August 27, 2000, in Osaka, Japan, the local Masamori Tokuyama defeated him by unanimous decision.
On June 13, 2011 in Tokyo, where the Japanese Yohei Tobe knocked him out in two rounds