| Birth Date: | 28 September 1985 |
| Birth Place: | Osaka Prefecture, Japan[1] |
| Ru Position: | Wing / Fullback |
| Years1: | 2008–22 |
| Clubs1: | Toshiba Brave Lupus |
| Apps1: | 118 |
| Points1: | 240 |
| Ru Clubupdate: | 21 February 2021 |
| Repyears1: | 2011 |
| Repcaps1: | 7 |
| Reppoints1: | 40 |
| Ru Sevensnationalyears1: | 2012–2015 |
| Ru Sevensnationalteam1: | Japan Sevens |
| Ru Sevensnationalcomp1: | 3 |
is a Japanese rugby union player. Usuzuki has played seven tests for the Japan national rugby union team.[2] Usuzuki was a member of the Japan national rugby union team at the 2011 Rugby World Cup.[3]