Mizuno came up in the Pancrase and M-1 organizations, but earned notice when he upset Melvin Manhoef at "DREAM.15" in July 2010. The win gave Mizuno the right to face Gegard Mousasi for the vacant light-heavyweight title at the next event.
| Age | 41 |
|---|---|
| Height | 6'1" |
| Weight | 205 |
| Place of birth | Ibaraki, Kanto, Japan |