Masao Koga boxer
- bouts
- 4
- won
- 1
- lost
- 3
- draw
- 0
- Status
- inactive
- Division
- flyweight
- Debut
- 1957-11-20
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Japan
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1959-01-13 | Masanobu Kambayashi | WWWWWL | LOST Points |
|
| 1958-02-25 | Masanobu Kambayashi | WWW | Asakusa Hall | WIN Points |
| 1958-01-06 | Masanobu Kambayashi | W | LOST Points |
|
| 1957-11-20 | Shigeru Ito | LWLWWW | LOST Technical knockout |