| Emperor's Cup 2021 - Appearances as Referee |  |
 |
 |
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| 09/06/2021 | JEF United Chiba | - | Omiya Ardija | 1:0 | - | - | - |
| Emperor's Cup 2021 - Appearances as Referee | |
|
|
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| 09/06/2021 | JEF United Chiba | - | Omiya Ardija | 1:0 | - | - | - |
| Complete name: | Ryosuke Yamaoka |
| Born: | 30/04/1981 |
| Place of birth: |
Japan |
| Nationality: |
Japan |