Koichi Mizushima is a gymnast who has competed for Japan. He competed at the 1988 Summer Olympic Games.
Olympic Results[]
| Year | Event | Result |
|---|---|---|
| 1988 | Men's individual all-around | 10th |
| Men's team | 
| |
| Men's floor | 19th | |
| Men's vault | 26th | |
| Men's parallel bars | 18th | |
| Men's horizontal bar | 12th | |
| Men's rings | 29th | |
| Men's pommel horse | 4th |
1988[]
| Discipline | Stage | Score |
|---|---|---|
| Individual all-around | Qualification | 117.450 |
| Final | 117.625 | |
| Team | Final | 585.600 (117.450) |
| Floor | Qualification | 19.550 |
| Final | Did not advance | |
| Vault | Qualification | 19.350 |
| Final | Did not advance | |
| Parallel bars | Qualification | 19.600 |
| Final | Did not advance | |
| Horizontal bar | Qualification | 19.600 |
| Final | Did not advance | |
| Rings | Qualification | 19.450 |
| Final | Did not advance | |
| Pommel horse | Qualification | 19.900 |
| Final | 19.900 |