KO
Super flyweight · Japan
Katsuya Onizuka 24-1-0 17 KO · 1988–1994
Updated Oct 12, 2026 · Sources: Wikidata, English Wikipedia, Wikipedia (ja)
Katsuya Onizuka was a super flyweight boxer from Japan, born Mar 12, 1970. Record 24-1-0 with 17 knockouts over 1988–1994. World titles: WBA super flyweight (1992–1994). Katsuya Onizuka last fought Hyung-Chul Lee on Sep 18, 1994 and lost by TKO in round 9 of 12.
Also: Кацуя Онидзука · كاتسويا أونيزوكا · کاتسویا اونیزوکا +7 more คะซุยะ โอะนิซุกะ · 鬼塚勝也 · Онидзука, Кацуя · اسپانکی-کی · คัตสุย่า โอนิซูกะ · スパンキーK · 鬼塚隆
Born Mar 12, 1970
Country 🇯🇵 Japan
Stance Orthodox
Nickname Spanky-K
Debut Apr 18, 1988
Career 1988–1994
Rounds boxed 144
KO share 71%
Born in Kitakyushu, Fukuoka, Japan
Titles WBA super flyweight · 1992–1994
Boxerbook rating 1813 ± 253 · inactive since Sep 1994Why here › Confirmed bouts 2 of 25
Career record Record
24-1-0, 17 KOs · 1988–1994
Last result L
Lost WBA super flyweight title TKO 9/12 · Yoyogi National Gymnasium, Tokyo, 🇯🇵
The record 25 bouts, 1988–1994, newest first. Records under each bout are both boxers going in.
Bouts by source: English Wikipedia · 25, Wikipedia (ja) · 25
L
Lost WBA super flyweight title TKO 9/12 · Yoyogi National Gymnasium, Tokyo, 🇯🇵
Onizuka 24-0-0 · Lee 17-4-0
W
Seung Koo Lee
Retained WBA super flyweight title UD 12/12 · Kokugikan, Tokyo, 🇯🇵
Onizuka 23-0-0 · Lee —
W
Retained WBA super flyweight title UD 12/12 · Ariake Coliseum, Tokyo, 🇯🇵
Onizuka 22-0-0 · Sithbaobay —
W
Jae Shin Lim
Retained WBA super flyweight title SD 12/12 · Nippon Budokan, Tokyo, 🇯🇵
Onizuka 21-0-0 · Lim —
W
Armando Castro
Retained WBA super flyweight title UD 12/12 · Ariake Coliseum, Tokyo, 🇯🇵
Onizuka 20-0-0 · Castro —
W
Retained WBA super flyweight title TKO 5/12 · Nippon Budokan, Tokyo, 🇯🇵
Onizuka 19-0-0 · Matsumura —
W
Won vacant WBA super flyweight title UD 12/12 · Metropolitan Gym, Tokyo, 🇯🇵
Onizuka 18-0-0 · Sithbaobay —
W
Chan Woo Park
TKO 7/10 · Nishi Nihon Sogo Hall, Kitakyushu, 🇯🇵
Onizuka 17-0-0 · Park —
W
Retained Japanese super flyweight title KO 5/10 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 16-0-0 · Kitazawa 10-2-0
W
Japanese title, 2nd defence DEC 10/10 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 15-0-0 · Nakajima —
W
Tomohiko Yokoyama
Retained Japanese super flyweight title KO 1/10 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 14-0-0 · Yokoyama —
W
Japanese super flyweight title TKO 10/10 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 13-0-0 · Nakajima —
W
Tatsuya Sugi
TKO 7/10 · City Hall, Hōfu, 🇯🇵
Onizuka 12-0-0 · Sugi —
W
Rex Rapiso
KO 1/10 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 11-0-0 · Rapiso —
W
Kyung Min Ahn
KO 1/10 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 10-0-0 · Ahn —
W
Dok Hyun Kim
KO 5/10 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 9-0-0 · Kim —
W
Sang Won Lee
KO 4/10 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 8-0-0 · Lee —
W
Masao Kawanishi
KO 2/8 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 7-0-0 · Kawanishi —
W
Yutaka Sakamoto
KO 2/6 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 6-0-0 · Sakamoto —
W
Mitsumasa Ikeda
PTS 6/6 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 5-0-0 · Ikeda —
Show all 25 bouts W
Ryoji Take
KO 3/4 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 4-0-0 · Take —
W
Tetsuya Esu
KO 3/4 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 3-0-0 · Esu —
W
Shigeru Ito
KO 1/4 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 2-0-0 · Ito —
W
Satoshi Kada
KO 1/4 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 1-0-0 · Kada —
W
Shoji Akiyama
KO 1/4 · Korakuen Hall, Tokyo, 🇯🇵
Onizuka 0-0-0 · Akiyama —
Ratings now Not in any current ranking.
World titles
Facts
What is Katsuya Onizuka's record? Katsuya Onizuka's professional record is 24-1-0 with 17 knockouts.
Who did Katsuya Onizuka fight last? Katsuya Onizuka last fought Hyung-Chul Lee on Sep 18, 1994 and lost by TKO in round 9 of 12.
Which world titles has Katsuya Onizuka held? Katsuya Onizuka has held 1 world title reign: WBA super flyweight (1992–1994). Sources Boxerbook ID 12652 · permanent link boxerbook.com/id/12652 . Wikidata (CC0), English Wikipedia (CC BY-SA). Last fetched: 2026-10-12. Spot a mistake? Every bout page has a link to report it.