Career
In February 1980, Kim participated in the Asian Amateur Boxing Championships held in Bombay, India. There he captured the gold medal in the flyweight division. On 17 May 1983 the southpaw defeated Chun Chan-jung for the Korean super bantamweight title.
Four months later he fought Little Bangoyan for the vacant Oriental and Pacific Boxing Federation (OPBF) title, capturing it with a twelve-round decision.
Foreign the next year Kim made five defenses of his OPBF title against the likes of Lito Cortez (KO 2), Rolando Navarro (PTS 12), and Fel Malatag (TKO 6). In December 1986, he retired from boxing in order to become a theatrical actor and singer, finishing with a record of 16 wins, no losses, and two ties, both ties coming from the same boxer.
He would become one of the few world champions to retire undefeated.