| Masamichi Yamamoto | |
| Birth Place: | Fujisawa, Kanagawa, Japan |
| Height: | 171 cm |
| Weight: | 64 kg |
| Currentteam: | Retired |
| Discipline: | Road |
| Role: | Rider |
| Ridertype: | Sprinter |
| Amateuryears1: | 2012–2014 |
| Amateurteam1: | BFY Racing Team |
| Amateuryears2: | 2016 |
| Amateurteam2: | Ciervo Nara |
| Proyears1: | 1998–1999 |
| Proteam1: | Nippon Hodo |
| Proyears2: | 2000 |
| Proteam2: | Miyata–Subaru |
| Proyears3: | 2001–2004 |
| Proteam3: | Shimano Racing Team |
| Proyears4: | 2005–2007 |
| Proyears5: | 2008–2011 |
| Proyears6: | 2015 |
is a Japanese former professional cyclist.