Hiroshi Kajiyama is a gymnast who has competed for Japan. He competed at the 1976 Summer Olympic Games.
One of the country's potential medal prospects, Kajiyama entered the all-around final with the third-highest cumulative score among the Japanese men, but he landed on the fifth overall spot and missed the medal by more than a tenth of a point behind his teammate Mitsuo Tsukahara. He assisted the Japanese men to successfully defend their team all-around title for the fifth consecutive time on the rear of his dominant vault and parallel bars routine. He also claimed a bronze behind Tsukahara on the vault, handing the entire medal haul for the Japanese gymnasts with a 2–3 finish. He received the third highest score on the parallel bars, but he was ineligible to enter the final because of the two-per-country limitation rule.
Olympic Results[]
| Year | Event | Result |
|---|---|---|
| 1976 | Men's individual all-around | 5th |
| Men's team | 
| |
| Men's floor | 12th | |
| Men's vault | 
| |
| Men's parallel bars | Q3 | |
| Men's horizontal bar | 9th | |
| Men's rings | 12th | |
| Men's pommel horse | 7th |
1976[]
| Discipline | Stage | Score |
|---|---|---|
| Individual all-around | Qualification | 115.250 |
| Final | 115.425 | |
| Team | Final | 576.850 (115.250) |
| Floor | Qualification | 18.950 |
| Final | Did not advance | |
| Vault | Qualification | 19.350 |
| Final | 19.275 | |
| Parallel bars | Qualification | 19.350 |
| Final | Did not advance | |
| Horizontal bar | Qualification | 19.250 |
| Final | Did not advance | |
| Rings | Qualification | 19.100 |
| Final | Did not advance | |
| Pommel horse | Qualification | 19.250 |
| Final | Did not advance |