| University: | Hosei University |
| Birth Date: | 27 September 1975 |
| Birth Place: | Osaka, Japan |
| Position: | Flanker, Lock |
| Amatteam1: | Hosei University High School RFC |
| Amatteam2: | Hosei University RFC |
| Years1: | 1998-2008 |
| Clubs1: | Suntory |
| Repyears1: | 1999-2004 |
| Repcaps1: | 23 |
| Reppoints1: | 0 |
(born 27 September 1975) is a former Japanese rugby union player. Okubo played 23 matches for the Japan national rugby union team from 1999 to 2004.[1] His regular playing positions were Flanker and Lock.
Okubo is the coach of Top League team Suntory Sungoliath.[2] In 2015, Okubo became the coach of NTT Communications Shining Arcs.[3]
He was named the first Non-Kiwi coach of the Sunwolves in their last year of Super Rugby in 2020.