Hiroyuki Masai boxer
- bouts
- 9
- won
- 3
- lost
- 4
- draw
- 2
- Status
- inactive
- Division
- featherweight
- Debut
- 1970-07-29
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Japan
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1974-10-26 | Tatsunoshin Iwami | WLWLDL | Nihon University Auditorium | WIN Points |
| 1974-07-21 | Tamio Negishi | LWWDWL | Korakuen Hall | DRAW Points |
| 1974-04-18 | Kenji Endo | LLWLLL | LOST KO |
|
| 1973-11-20 | Sanjo Takemori | WWLLWW | Nihon University Auditorium | LOST KO |
| 1972-10-13 | Joe Malonso | LLLLLW | Agana | LOST Points |
| 1971-11-15 | Katsutoshi Inuzuka | WLWWWW | WIN Points |
|
| 1971-05-06 | Koji Kunishige | WLLW | WIN Points |
|
| 1970-11-15 | Hurricane Teru | WD | LOST Points |
|
| 1970-07-29 | Osamu Toku | DL | Korakuen Hall | DRAW Points |
