CJ
Light flyweight · South Korea
Chang Jung-koo 38-5-0 17 KO · 1980–1991
Updated Oct 12, 2026 · Sources: Wikidata, English Wikipedia, Wikipedia (ja)
Chang Jung-koo was a light flyweight boxer from South Korea, born Feb 4, 1963. Record 38-5-0 with 17 knockouts over 1980–1991. World titles: WBC light flyweight (1983–1988). Chang Jung-koo last fought Sot Chitalada on Nov 24, 1991 and lost by MD over 12 rounds.
Also: Чан Джон Гу · تشانج يونج كو · تشانغ يونغ كو +5 more ชัง ช็อน-กู · 張正九 · 장정구 · Jung Koo Chang · Jung-Koo Chang
Born Feb 4, 1963
Country 🇰🇷 South Korea
Stance Orthodox
Nickname The Korean Hawk
Debut Nov 17, 1980
Career 1980–1991
Rounds boxed 346
KO share 45%
Born in Busan, South Korea
Titles WBC light flyweight · 1983–1988
Boxerbook rating 1860 ± 236 · inactive since Nov 1991Why here › Confirmed bouts 11 of 43
Career record Record
38-5-0, 17 KOs · 1980–1991
Last result L
MD 12/12 · Olympic Park Gymnasium, Seoul, 🇰🇷
The record 43 bouts, 1980–1991, newest first. Records under each bout are both boxers going in.
Bouts by source: English Wikipedia · 43, Wikipedia (ja) · 3
L
MD 12/12 · Olympic Park Gymnasium, Seoul, 🇰🇷
Jung-koo 38-4-0 · Chitalada 26-3-1
L
TKO 12/12 · Olympic Gymnastics Arena, Seoul, 🇰🇷
Jung-koo 38-3-0 · Kittikasem 14-1-0
L
MD 12/12 · Olympic Park Gymnasium, Seoul, 🇰🇷
Jung-koo 38-2-0 · Chitalada 22-2-1
W
TKO 8/12 · Koomi, 🇰🇷
Jung-koo 37-2-0 · Siodora —
L
For WBC light-flyweight title UD 12/12 · Indoor Gymnasium, Daegu, 🇰🇷
Jung-koo 37-1-0 · González 25-0-0
W
Amando Velasco
UD 10/10 · Busan, 🇰🇷
Jung-koo 36-1-0 · Velasco —
W
For WBC light-flyweight title TKO 8/12 · Korakuen Hall, Tokyo, 🇯🇵
Jung-koo 35-1-0 · Ohashi 8-2-0
W
For WBC light-flyweight title UD 12/12 · Chungmu Gymnasium, Daejeon, 🇰🇷
Jung-koo 34-1-0 · Pérez 47-3-3
W
Agustin Garcia
Retained WBC light-flyweight title TKO 10/12 · Chungmu Gymnasium, Daejeon, 🇰🇷
Jung-koo 33-1-0 · Garcia —
W
Efren Pinto
Retained WBC light-flyweight title TKO 6/12 · Chungmu Gymnasium, Daejeon, 🇰🇷
Jung-koo 32-1-0 · Pinto —
W
For WBC light-flyweight title TKO 5/12 · Sunin Gymnasium, Incheon, 🇰🇷
Jung-koo 31-1-0 · Ohashi 5-1-0
W
Francisco Montiel
Retained WBC light-flyweight title UD 12/12 · Chungmu Gymnasium, Daejeon, 🇰🇷
Jung-koo 30-1-0 · Montiel —
W
Retained WBC light-flyweight title UD 12/12 · Indoor Arena, Gwangju City, 🇰🇷
Jung-koo 29-1-0 · Torres —
W
Jorge Cano
Retained WBC light-flyweight title UD 12/12 · Chungmu Gymnasium, Daejeon, 🇰🇷
Jung-koo 28-1-0 · Cano —
W
Francisco Montiel
Retained WBC light-flyweight title UD 12/12 · Munhwa Gymnasium, Seoul, 🇰🇷
Jung-koo 27-1-0 · Montiel —
W
Retained WBC light-flyweight title MD 12/12 · Hyundai Gymnasium, Ulsan, 🇰🇷
Jung-koo 26-1-0 · Torres —
W
Tadashi Kuramochi
Retained WBC light-flyweight title UD 12/12 · Gudeok Gymnasium, Busan, 🇰🇷
Jung-koo 25-1-0 · Kuramochi —
W
For WBC light flyweight title TKO 9/12 · Pohang Gymnasium, Pohang, 🇰🇷
Jung-koo 24-1-0 · Tokashiki 19-3-2
W
Retained WBC light-flyweight title UD 12/12 · Kooduk Gymnasium, Busan, 🇰🇷
Jung-koo 23-1-0 · Chitalada 4-0-0
W
Retained WBC light-flyweight title UD 12/12 · Chungmu Gymnasium, Daejeon, 🇰🇷
Jung-koo 22-1-0 · Torres —
Show all 43 bouts W
Masaharu Inami
Retained WBC light-flyweight title KO 2/12 · Kyungbok Gymnasium, Daegu, 🇰🇷
Jung-koo 21-1-0 · Inami —
W
Won WBC light flyweight title TKO 3/15 · Chungmu Gymnasium, Daejeon, 🇯🇵
Jung-koo 20-1-0 · Zapata 22-2-0
W
Tio Abella
KO 2/10 · Chungju, 🇰🇷
Jung-koo 19-1-0 · Abella —
W
Rodrigo Saony
PTS 10/10 · Jinju, 🇰🇷
Jung-koo 18-1-0 · Saony —
L
For WBC light flyweight title SD 15/15 · Jeonju Gymnasium, Jeonju, 🇰🇷
Jung-koo 18-0-0 · Zapata 20-2-0
W
UD 10/10 · Changchung Gymnasium, Seoul, 🇰🇷
Jung-koo 17-0-0 · Ursua —
W
Lukodd Phitiporn
TKO 5/10 · Gudeok Gymnasium, Busan, 🇰🇷
Jung-koo 16-0-0 · Phitiporn —
W
RTD 6/10 · Gyeongbuk Gymnasium, Daegu, 🇰🇷
Jung-koo 15-0-0 · Jong-kwan 3-4-1
W
Alfonso Lopez
KO 3/8 · Jangchung Gymnasium, Seoul, 🇰🇷
Jung-koo 14-0-0 · Lopez —
W
Chutmongkol Thairungriang
KO 2/10 · Kudok Gymnasium, Busan, 🇰🇷
Jung-koo 13-0-0 · Thairungriang —
W
Leonardo Paredes
KO 6/10 · Chungmu Gymnasium, Daejeon, 🇰🇷
Jung-koo 12-0-0 · Paredes —
W
Lord Esmero
UD 10/10 · Chungmu Gymnasium, Daejeon, 🇰🇷
Jung-koo 11-0-0 · Esmero —
W
Oscar Bolivar
PTS 10/10 · Chungmu Gymnasium, Daejeon, 🇰🇷
Jung-koo 10-0-0 · Bolivar —
W
Miguel Leal
PTS 10/10 · Busan, 🇰🇷
Jung-koo 9-0-0 · Leal —
W
Yo Dong Kim
PTS 6/6 · Kudok Gymnasium, Busan, 🇰🇷
Jung-koo 8-0-0 · Kim —
W
Chang Pyo Hong
PTS 8/8 · Gudeok Gymnasium, Busan, 🇰🇷
Jung-koo 7-0-0 · Hong —
W
Jin Hyung Park
KO 2/6 · Busan, 🇰🇷
Jung-koo 6-0-0 · Park —
W
Nam Keun Kang
PTS 6/6 · Munhwa Gymnasium, Seoul, 🇰🇷
Jung-koo 5-0-0 · Kang —
W
PTS 4/4 · Munhwa Gymnasium, Seoul, 🇰🇷
Jung-koo 4-0-0 · Hi-sup 4-0-0
W
Ho Chul Pyun
PTS 4/4 · Munhwa Gymnasium, Seoul, 🇰🇷
Jung-koo 3-0-0 · Pyun —
W
Hee Kwan Lee
PTS 4/4 · Munhwa Gymnasium, Seoul, 🇰🇷
Jung-koo 2-0-0 · Lee —
W
Jin Hyung Park
TKO 3/4 · Munhwa Gymnasium, Seoul, 🇰🇷
Jung-koo 1-0-0 · Park —
W
Jung Yul Suh
KO 3/4 · Munhwa Gymnasium, Seoul, 🇰🇷
Jung-koo 0-0-0 · Suh —
Ratings now Not in any current ranking.
World titles
Facts
What is Chang Jung-koo's record? Chang Jung-koo's professional record is 38-5-0 with 17 knockouts.
Who did Chang Jung-koo fight last? Chang Jung-koo last fought Sot Chitalada on Nov 24, 1991 and lost by MD over 12 rounds.
Which world titles has Chang Jung-koo held? Chang Jung-koo has held 1 world title reign: WBC light flyweight (1983–1988). Sources Boxerbook ID 12639 · permanent link boxerbook.com/id/12639 . Wikidata (CC0), English Wikipedia (CC BY-SA). Last fetched: 2026-10-12. Spot a mistake? Every bout page has a link to report it.