Seiji Haga boxer
- bouts
- 6
- won
- 3
- lost
- 3
- draw
- 0
- Status
- inactive
- Division
- minimumweight
- Debut
- 2006-07-02
- Height
- 5′ 2½″/159cm
- Reach
- -
- Age
- -
- Born
- 1986-09-03
- Death
- -
- Nationality
- Japan
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 2007-11-18 | Yoshikazu Hoshina | LWW | Omori Gold Gym | WIN Majority decision |
| 2007-06-06 | Kazuhiro Miyama | WLLWW | Korakuen Hall | LOST Split-decision |
| 2007-04-03 | Kazuki Naito | LW | Korakuen Hall | WIN Technical knockout |
| 2006-12-06 | Akihisa Narita | WL | Korakuen Hall | LOST Technical knockout |
| 2006-08-24 | Kosuke Ota | L | Korakuen Hall | LOST Split-decision |
| 2006-07-02 | Mitsuyoshi Tsujita | debut | Omori Gold Gym | WIN KO |