| Masashi Kokubun | |
| Birth Date: | 14 May 1995 |
| Birth Place: | Sapporo, Hokkaido, Japan[1] |
| Height: | 1.74 m |
| Currentclub: | Vanraure Hachinohe |
| Clubnumber: | 32 |
| Position: | Midfielder |
| Youthyears1: | 2011-2013 |
| Youthclubs1: | Consadole Sapporo |
| Youthyears2: | 2014–2017 |
| Youthclubs2: | Kindai University |
| Years1: | 2018–2020 |
| Caps1: | 93 |
| Goals1: | 5 |
| Years2: | 2021 |
| Caps2: | 5 |
| Goals2: | 0 |
| Years3: | 2022– |
| Caps3: | 46 |
| Goals3: | 3 |
| Club-Update: | 29 August 2023 (UTC) |
is a Japanese footballer currently playing as a midfielder for Vanraure Hachinohe.
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| Club | Season | League | National Cup | League Cup | Other | Total | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Division | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | |||
| Vanraure Hachinohe | 2018 | JFL | 29 | 3 | 0 | 0 | – | 0 | 0 | 29 | 3 | ||
| 2019 | J3 League | 33 | 1 | 3[2] | 1 | 0 | 0 | 0 | 0 | 35 | 2 | ||
| 2020 | 26 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| Blaublitz Akita | 2021 | J2 League | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | |
| Vanraure Hachinohe | 2022 | J3 League | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Career total | 93 | 5 | 3 | 1 | 0 | 0 | 0 | 0 | 96 | 6 | |||