| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Kotaro•Mizumachi |
| Used name | Kotaro•Mizumachi |
| Original name | ミズマチ•コタロ |
| Born | 13 March 1995 |
| NOC |  Japan |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2020 Summer Olympics | Handball | JPN |
Kotaro Mizumachi | |||
| Handball, Men (Olympic) | Japan | 11 |
