Yasuhiro Koyama boxer
- bouts
- 4
- won
- 1
- lost
- 3
- draw
- 0
- Status
- inactive
- Division
- lightweight
- Debut
- 2009-12-05
- Height
- -
- Reach
- -
- Age
- -
- Born
- 1988-05-31
- Death
- -
- Nationality
- Japan
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 2014-11-14 | Tomoki Takada | D | Korakuen Hall | LOST Unanimous decision |
| 2014-06-25 | Manabu Yamaguchi | D | Korakuen Hall | WIN Unanimous decision |
| 2010-03-29 | Yoshiyuki Nemoto | debut | Korakuen Hall | LOST Technical knockout |
| 2009-12-05 | Shinichi Saito | debut | Korakuen Hall | LOST Unanimous decision |