Katsuya Onizuka 鬼塚 勝也
24–1 · 25 recorded bouts · 1988–1994
24–1
Katsuya Onizuka 鬼塚 勝也 finished 71% of 24 wins inside the distance — the 81st percentile for super flyweight boxing, where the median is 57%. No reach is on record, so this page compares record rather than measurements.
SOURCE·Katsuya Onizuka — English Wikipedia (CC BY-SA 4.0)·derived figures computed here·REVIEWED 2026-07-07
How this record is compiled
- Measurements come from the fighter's English Wikipedia infobox; the bout list is parsed from the results table on the same article, read on 2026-07-07. Boxing tables are read by header name and MMA records by the fixed column order of the
MMA recordtemplate — two different parsers, because reading MMA rows as a boxing table returns a fighter's boxing record in place of their real one. - A bout enters the ledger with whatever fields the source states: result, opponent, method, round, year. Any field the source leaves empty stays empty here. A date that cannot be established is left blank rather than inferred, and the bout is still counted.
- A no contest is counted and printed as a no contest. It is never folded into the wins, the losses or the draws, and it never disappears to make a total balance.
- Where the article's infobox total disagrees with its own results table, both figures are published and each is labelled with where it came from. Nothing is averaged and nothing is reconciled against a second database.
- Percentiles rank this fighter among the 114 super flyweight boxing fighters in the dataset — the most specific group of at least 30 that this fighter belongs to.
Bout record
Every bout the article's own results table lists, in order. A dash is a field the source leaves empty — it is not a zero and it is not a guess.
| Year | Result | Opponent | Method | Rd |
|---|---|---|---|---|
| 1994 | L | Lee Hyung-chul | KO/TKO | 9 |
| 1994 | W | Seung Koo Lee | Decision | 12 |
| 1993 | W | Thanomsak Sithbaobay | Decision | 12 |
| 1993 | W | Jae Shin Lim | Decision | 12 |
| 1992 | W | Armando Castro | Decision | 12 |
| 1992 | W | Kenji Matsumura | KO/TKO | 5 |
| 1992 | W | Thanomsak Sithbaobay | Decision | 12 |
| 1991 | W | Chan Woo Park | KO/TKO | 7 |
| 1991 | W | Suzuharu Kitazawa | KO/TKO | 5 |
| 1991 | W | Shunichi Nakajima | Decision | 10 |
| 1990 | W | Tomohiko Yokoyama | KO/TKO | 1 |
| 1990 | W | Shunichi Nakajima | KO/TKO | 10 |
| 1990 | W | Tatsuya Sugi | KO/TKO | 7 |
| 1990 | W | Rex Rapiso | KO/TKO | 1 |
| 1989 | W | Kyung Min Ahn | KO/TKO | 1 |
| 1989 | W | Dok Hyun Kim | KO/TKO | 5 |
| 1989 | W | Sang Won Lee | KO/TKO | 4 |
| 1989 | W | Masao Kawanishi | KO/TKO | 2 |
| 1989 | W | Yutaka Sakamoto | KO/TKO | 2 |
| 1988 | W | Mitsumasa Ikeda | Decision | 6 |
| 1988 | W | Ryoji Take | KO/TKO | 3 |
| 1988 | W | Tetsuya Esu | KO/TKO | 3 |
| 1988 | W | Shigeru Ito | KO/TKO | 1 |
| 1988 | W | Satoshi Kada | KO/TKO | 1 |
| 1988 | W | Shoji Akiyama | KO/TKO | 1 |
3 of these opponents have their own page here.
SOURCE·Katsuya Onizuka — English Wikipedia (CC BY-SA 4.0)·derived figures computed here·REVIEWED 2026-07-07
What is on record
| Reach | not recorded | |
|---|---|---|
| Height | 68″ (172.7 cm) | |
| Stance | Orthodox | |
| Division | Super Flyweight Boxing | |
| Most active decade | 1990s — 14 of 25 dated bouts | |
| Country | Japan |
Wikipedia carries no reach figure for Katsuya Onizuka 鬼塚 勝也, so the reach-advantage comparison this site is built on cannot be computed. Everything below comes from the record instead.
Record
Boxing record
24–1
25 bouts on record
Finish rate
71%
of wins ended inside the distance — super flyweight boxing median 57%, 81st percentile
The career, bout by bout
25 recorded bouts from 1988 to 1994. Every incumbent shows this as a table you have to read; here it is as a shape you can see.
Career span
7y
1988–1994
Longest unbeaten run
23
without a loss — draws do not break it
Busiest year
1988
6 bouts
Recorded bouts
25
25 with a date
What this record does and does not say
- What is Katsuya Onizuka 鬼塚 勝也's record?
- 24–1 in boxing. That is the aggregate stated in the English Wikipedia infobox; the results table on the same article lists 25 bouts individually.
- Does a no contest change a record here?
- No. A no contest is not a win, a loss or a draw, and it is never folded into one. It is counted and printed separately, so a 20–0 record with two no contests is shown as exactly that rather than as 22–0 or as 20–0 with the no contests dropped. The same applies to a bout overturned after the fact where the source records the change.
- What happens when sources disagree about a fight?
- This site publishes one source — the fighter's English Wikipedia article, read on the date printed under every table — and it does not silently reconcile that against anyone else's database. Where the article's own infobox total and its own results table disagree, both are shown and the page says which one each figure came from. Nothing is averaged, and no field is filled in from a second source to make a total balance.
Where this record leads
The 115 super flyweight boxing fighters this record is ranked against, and the distribution 勝也 sits inside.
115 FIGHTERS 1990s boxing14 of these bouts fall in the 1990s. This is what the rest of that decade's records look like.
307 FIGHTERS Longest unbeaten runsKatsuya Onizuka 鬼塚 勝也 went 23 without a loss. This is where that sits against every run on the site.
LEADERBOARD