Ryota Koizumi boxer
- bouts
- 20
- won
- 6
- lost
- 12
- draw
- 2
- Status
- inactive
- Division
- featherweight
- Debut
- 2007-06-04
- Height
- -
- Reach
- -
- Age
- -
- Born
- 1984-12-16
- Death
- -
- Nationality
- Japan
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 2016-09-14 | Hiromu Tamura | LLLLLD | Korakuen Hall | LOST Majority decision |
| 2016-03-06 | Hiromu Tamura | LLLLLL | Todoroki Arena, Kawasaki | DRAW Majority decision |
| 2015-04-24 | Yamato Nakagawa | WWWLLL | Korakuen Hall | LOST Technical knockout |
| 2014-06-01 | Ryuto Araya | WWDWLL | City Sogo Gym, Chigasaki | LOST |
| 2012-11-19 | Naoto Uebayashi | debut | Korakuen Hall | LOST Technical knockout |
| 2012-07-14 | Bong Joon Suk | DWWLW | Chungnam Marine High School, Boryeong | LOST Technical knockout |
| 2012-03-12 | Shogo Ojima | WWWWWW | Korakuen Hall | LOST Unanimous decision |
| 2011-10-24 | Tsubasa Mochizuki | WLWWLW | Korakuen Hall | LOST Technical knockout |
| 2011-07-11 | Yoshihisa Nakayama | LDLLLL | Korakuen Hall | DRAW |
| 2010-11-21 | Takezo Nakamura | LLLLWW | Omori Gold Gym | WIN Technical knockout |
| 2010-05-01 | Hajime Nagai | WWWWWL | Korakuen Hall | LOST |
| 2009-11-22 | Masahiro Ishida | WWDWDW | Omori Gold Gym | LOST Majority decision |
| 2009-08-13 | Hiroyuki Mori | LWLWLL | Korakuen Hall | WIN KO |
| 2009-06-15 | Hiroyuki Nakao | WLLDLW | Korakuen Hall | WIN Unanimous decision |
| 2009-04-02 | Kenta Takahashi | WWL | Korakuen Hall | LOST Unanimous decision |
| 2008-11-30 | Shinji Furukawa | LLLLLL | Omori Gold Gym | LOST Technical knockout |
| 2008-09-15 | Masaki Nagai | LW | Pacifico, Yokohama | WIN KO |
| 2008-07-06 | Shusuke Uda | D | Omori Gold Gym | WIN Technical knockout |
| 2007-12-11 | J Kumagai | debut | Bunka Gym, Yokohama | WIN Unanimous decision |
| 2007-06-04 | Takamitsu Oshida | LDL | Pacifico, Yokohama | LOST Unanimous decision |