| J2 League 2021 - Appearances as Referee |  |
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 |
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| 12/09/2021 | Ehime FC | - | RB Omiya Ardija | 3:3 | 1 | - | - |
| 03/10/2021 | Giravanz Kitakyushu | - | Thespakusatsu Gunma | 2:2 | 2 | - | - |
| 07/11/2021 | Ehime FC | - | FC Machida Zelvia | 0:0 | 2 | - | - |
| J2 League 2021 - Appearances as Referee | |
|
|
||||
| 12/09/2021 | Ehime FC | - | RB Omiya Ardija | 3:3 | 1 | - | - |
| 03/10/2021 | Giravanz Kitakyushu | - | Thespakusatsu Gunma | 2:2 | 2 | - | - |
| 07/11/2021 | Ehime FC | - | FC Machida Zelvia | 0:0 | 2 | - | - |
| Complete name: | Koei Koya |
| Born: | |
| Place of birth: |
Japan |
| Nationality: |
Japan |