Masatoshi Kobayashi boxer
- bouts
- 4
- won
- 2
- lost
- 1
- draw
- 1
- Status
- inactive
- Division
- light flyweight
- Debut
- 1988-07-03
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Japan
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1990-05-20 | Michio Kurokawa | L | Amagasaki | DRAW Points |
| 1990-02-25 | Tsutomu Kamiyama | L | Tsukashin Tent In, Amagasaki | WIN Technical knockout |
| 1988-08-29 | Tatenori Kamioka | LLW | Prefectural Gymnasium, Osaka | LOST Technical knockout |
| 1988-07-03 | Shinji Arai | WLLWL | Osaka | WIN Points |