| Fujio Nagai | |
| Nationality: | Japanese |
| Sport: | Boxing |
| Birth Date: | 29 September 1951 |
| Birth Place: | Takasaki, Japan |
was a Japanese boxer. He competed in the men's flyweight event at the 1972 Summer Olympics.[1] At the 1972 Summer Olympics, he defeated Rene Fortaleza of the Philippines, before losing to Douglas Rodriguez of Cuba.[1]