No amateur resultsProfessional record| Date | Opponent | Place | Result | | 1985 | | + Dec. 4 | Young Jae Chung | Seoul, South Korea | KO 3 | | + Dec. 5 | Jae Hak Chun | Seoul, South Korea | W 4 | | + Dec. 8 | Jung Ho Kang | Seoul, South Korea | W 4 | | + Dec. 10 | Hi Chung Noh | Seoul, South Korea | W 4 | | 1986 | | + Jan. 12 | Dong Pil Yang | Seoul, South Korea | W 6 | | + May 31 | Il Hwan Kim | Bucheon, South Korea | KO 5 | | + June 29 | No Sung Choi | Seoul, South Korea | W 6 | | + Aug. 3 | Byung-Shik Bae | Seoul, South Korea | W 8 | | + Nov. 16 | Sung Kyu Kim | Kunsan, South Korea | W 8 | | 1987 | | + Mar. 14 | Byung Nam Park | Chuncheon, South Korea | KO 1 | | + June 14 | Masaharu Kawakami | Bukok, South Korea | KO 2 | | inaugural IBF Minimumweight Title | | 1988 | | - Jan. 31 | Hiroki Ioka | Osaka, Japan | TKO by 12 | | WBC Minimumweight Title | | + Apr. 30 | Nico Thomas | Ulsan, South Korea | KO 4 | | + July 24 | Hi Chung Noh | Pohang City, South Korea | W 10 | | + Oct. 29 | Sang Sik Chang | Ansan City, South Korea | KO 2 | | 1989 | | + Oct. 3 | Hi-Hwan Moon | Seoul, South Korea | KO 4 | | + Dec. 29 | Nikki Maca | Bucheon, South Korea | W 10 | | 1990 | | + Apr. 15 | Nikki Maca | Suwon City, South Korea | TW 8 | | + June 16 | Chris Galon | Ulsan, South Korea | W 10 | | + Oct. 20 | Vin Chuvatana | Seoul, South Korea | KO 1 | | 1991 | | + Apr. 6 | Aswin Sithlakmuang | Seoul, South Korea | W 10 | | - Dec. 21 | Ricardo Lopez | Seoul, South Korea | L 12 | | WBC Minimumweight Title | 1992
Inactive | | 1993 | | - July 11 | Pichit Sithbanprachan | Nakhon Sawan, Thailand | TKO by 1 | | IBF Flyweight Title |
Summary
Total bouts: 23, Won: 20 (8 inside the limit), Lost: 3 (2 inside the limit), Draw: 0, NC: 0
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