| Kosuke Mashiyama | |
| Nationality: | Japanese |
| Birth Date: | 9 March 1999 |
| Weight Class: | –90 kg |
| Worlds Rank: | R32 |
| Worlds Year: | 2022 |
| Worlds Weight: | Men's 90 kg |
| Regionals Type: | AS |
| Regionals Rank: | 1 |
| Regionals Year: | 2019 |
| Updated: | 3 December 2022 |
Kosuke Mashiyama (born 9 March 1999) is a Japanese judoka.
He won a medal at the 2021 World Judo Championships.[1] [2]