Koji Koyama boxer
- bouts
- 20
- won
- 15
- lost
- 4
- draw
- 1
- Status
- inactive
- Division
- super flyweight
- Debut
- 1998-08-21
- Height
- 5′ 5″/165cm
- Reach
- -
- Age
- -
- Born
- 1976-08-28
- Death
- -
- Nationality
- Japan
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 2004-09-10 | Daigo Nakahiro | WWWWWW | Prefectural Gymnasium, Hiroshima | LOST KO |
| 2004-04-11 | Narong Datchthuyawat | WWLLLW | Suzuhide Kanayama Hall, Nagoya | WIN Technical knockout |
| 2004-02-08 | Hiroshi Nakano | WWWWWW | Memorial Center, Gifu | LOST |
| 2003-12-28 | Puwanai Lithab | L | Park Arena, Komaki | WIN Technical knockout |
| 2003-09-07 | Yusuke Morishima | WWWWWW | Rainbow Hall, Nagoya | WIN Unanimous decision |
| 2003-05-05 | Noriyuki Baba | DLLWDW | City Hall, Nagoya | WIN Technical knockout |
| 2002-12-12 | Maengpong Kiatthorborubol | LLWW | International Conference Hall, Nagoya | WIN Unanimous decision |
| 2002-06-09 | Carlos Garcia | W | Park Arena, Komaki | WIN Technical knockout |
| 2002-03-16 | Win Panyaparichot | LLLL | International Conference Hall, Nagoya | WIN KO |
| 2001-11-25 | Dong-Kil Shin | WWWW | Park Arena, Komaki | WIN |
| 2001-08-01 | Baot Sihonbin | debut | International Conference Hall, Nagoya | WIN Technical knockout |
| 2001-04-22 | Kenroku Miyahara | DL | Nagoya | WIN Points |
| 2000-12-16 | Takeyuki Kojima | WLWWWW | DRAW Points |
|
| 2000-11-04 | Yuki Murai | LDWWWW | Nagoya | WIN Points |
| 2000-09-16 | Toyotaka Higashi | WWLWD | City Gymnasium, Tokai | WIN Technical knockout |
| 2000-07-01 | Kiyokuni Kanaya | DLW | Nagoya | WIN Points |
| 1999-09-15 | Takumi Kawahara | LL | Nagoya | WIN KO |
| 1999-07-18 | Yugo Tsuboi | LDW | Auditorium, Nagoya | LOST Points |
| 1999-04-11 | Atsushi Hirose | debut | Nagoya | WIN Technical knockout |
| 1998-08-21 | Gori Matsumoto | debut | Nagoya | LOST Technical knockout |