Koichi Ishimori had the following finishes at major championships – 1983 World Championship: Unlimited Freestyle (8th); 1982 World Championship: 100.0 kg. Freestyle (14th).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1984 Summer Olympics | Wrestling |  JPN |
Koichi Ishimori | |||
| Super-Heavyweight, Freestyle, Men (Olympic) | 7 |
