Keiichiro Yamamiya Mixed martial arts record Mixed martial arts record

| Res_ | Record | Opponent | Method_ | Event | Round | Location_ |
|---|---|---|---|---|---|---|
| Win | 18-13-5 | Chris Lytle | Decision (unanimous) | Pancrase - Trans 1 | 1 | Tokyo , Japan |
| Loss | 17-13-5 | Eugene Jackson | KO (punch) | UFC 23 | 3 | Tokyo , Japan |
| Win | 17-12-5 | Leon Dijk | TKO | Pancrase - Breakthrough 7 | 1 | Tokyo , Japan |
| Loss | 16-12-5 | Kiuma Kunioku | Decision (lost points) | Pancrase - Breakthrough 5 | 1 | Nagoya , Japan |
| Win | 16-11-5 | Yuhi Sano | TKO (strikes) | Pancrase - Breakthrough 3 | 1 | Tokyo , Japan |
| Draw | 15-11-5 | Jeremy Horn | Draw | Pancrase - Advance 12 | 1 | Tokyo , Japan |
| Win | 15-11-4 | Jason DeLucia | Decision (lost points) | Pancrase - Advance 10 | 1 | Tokyo , Japan |
| Win | 14-11-4 | Satoshi Hasegawa | Decision (majority) | Pancrase - 1998 Neo-Blood Tournament Second Round | 1 | Japan |