Kojiro Yamamoto boxer
- bouts
- 5
- won
- 1
- lost
- 4
- draw
- 0
- Status
- inactive
- Division
- flyweight
- Debut
- 1980-12-21
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Japan
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1982-07-29 | Fujio Ito | L | Prefectural Gymnasium, Osaka | LOST KO |
| 1982-05-04 | Katsuhiko Fukugomori | LLLWWW | Korakuen Hall | LOST Unanimous decision |
| 1981-10-04 | Koki Higashi | WWLLW | Tagawa | LOST Points |
| 1981-03-01 | Keiji Kawamura | WWWWDW | Korakuen Hall | LOST KO |
| 1980-12-21 | Hiroaki Kato | WW | WIN Points |