| J1 League Relegation Playoffs 2019 - Appearances as Referee |  |
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| 01/12/2019 | Omiya Ardija | - | Montedio Yamagata | 0:2 | 2 | - | - |
| J1 League Relegation Playoffs 2019 - Appearances as Referee | |
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| 01/12/2019 | Omiya Ardija | - | Montedio Yamagata | 0:2 | 2 | - | - |
| Complete name: | Ryosuke Yamaoka |
| Born: | 30/04/1981 |
| Place of birth: |
Japan |
| Nationality: |
Japan |