Info
| Last name | Koshiyama |
| First name | Masahiro |
| Nationality |  Japan |
| Date of birth | 10-04-1986 |
| Age | 39 |
About Masahiro Koshiyama
Masahiro Koshiyama is a Japanese cycling professional, 39 years old.
| Date | Rank | Race |
|---|---|---|
| 23-11 | 25 | Kansai Cyclocross Biwako Grand Prix (C2) |