Masayuki Kobayashi boxer
- bouts
- 12
- won
- 6
- lost
- 1
- draw
- 5
- Status
- inactive
- Division
- flyweight
- Debut
- 1975-03-23
- Height
- -
- Reach
- -
- Age
- -
- Born
- 1953-10-17
- Death
- -
- Nationality
- Japan
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1977-04-02 | Shigeo Nakajima | WDWW | Kokugikan | LOST Points |
| 1976-11-15 | Kiyotaka Mikami | WLLLWL | Gunma Sports Center, Maebashi | WIN Points |
| 1976-10-08 | Yoshiyuki Shiomi | debut | DRAW Points |
|
| 1976-07-08 | Yasuo Machida | L | WIN Points |
|
| 1976-05-09 | Chuji Muto | WLWWDL | DRAW Points |
|
| 1976-03-05 | Yasuto Yamamoto | L | DRAW Points |
|
| 1975-12-08 | Tsutomu Yamazaki | L | Takasaki | WIN Unanimous decision |
| 1975-11-13 | Shigeo Maezawa | LW | DRAW Points |
|
| 1975-10-02 | Hidemi Ueki | debut | WIN Points |
|
| 1975-08-15 | Hiroyuki Kanda | WW | WIN Points |
|
| 1975-05-03 | Sadamu Yokoyama | debut | WIN Points |
|
| 1975-03-23 | Koichi Watanabe | debut | Takasaki | DRAW Points |