Seiji Onuma boxer
- bouts
- 8
- won
- 4
- lost
- 4
- draw
- 0
- Status
- inactive
- Division
- bantamweight
- Debut
- 1996-11-15
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Japan
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 2001-12-15 | Tsutomu Yamauchi | LWWWW | Seaside Sports Center, Sodegaura | LOST Points |
| 2001-07-21 | Yuji Nukaga | WWWLWW | Korakuen Hall | LOST Technical knockout |
| 2001-03-19 | Keisuke Ayukawa | LWWWWW | WIN KO |
|
| 2000-10-20 | Masaki Hiramaru | WWLWDW | LOST Points |
|
| 2000-02-07 | Prosper Matsuura | WWWLWW | LOST Points |
|
| 1999-08-30 | Yoshikane Nakajima | WDWWWW | WIN Points |
|
| 1998-02-16 | Shingo Sasaki | WLWW | WIN Points |
|
| 1996-11-15 | Shingo Sasaki | W | Korakuen Hall | WIN KO |