Ryutaro Osako boxer
- bouts
- 4
- won
- 3
- lost
- 1
- draw
- 0
- Status
- inactive
- Division
- super featherweight
- Debut
- 2008-03-02
- Height
- -
- Reach
- -
- Age
- -
- Born
- 1988-01-23
- Death
- -
- Nationality
- Japan
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 2009-05-25 | Ribo Takahata | WWW | Korakuen Hall | LOST Unanimous decision |
| 2008-08-03 | Hirokazu Nemoto | DW | Shinjuku FACE | WIN KO |
| 2008-06-08 | Ryusuke Harashima | LW | Shinjuku FACE | WIN KO |
| 2008-03-02 | Takahiro Iino | debut | Shinjuku FACE | WIN Technical knockout |