| Birth Date: | 1 January 1944 |
| Birth Place: | Mito, Ibaraki, Japan |
| Height: | 1.75m (05.74feet) |
| Weight: | 75kg (165lb) |
| Sport: | Sprint running, baseball |
| Show-Medals: | yes |
is a retired Japanese sprint runner and professional baseball player. He competed at the 1964 and 1968 Olympics in the 100 m and 4 × 100 m relay events, but was eliminated in semifinals on all occasions. At the 1968 Games he ran his personal best in all competitions (10.24–10.34 seconds depending on the wind).[1]
After the 1968 Olympics Iijima became a professional baseball player. He retired in 1971 and for one year worked as a baseball coach.[2]