| U18 Premier League 2025 West - Appearances as Referee |  |
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| 06/05/2025 | Otsu High School | - | Teikyo Nagaoka High School | 1:2 | 1 | - | - |
| U18 Premier League 2025 West - Appearances as Referee | |
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| 06/05/2025 | Otsu High School | - | Teikyo Nagaoka High School | 1:2 | 1 | - | - |
| Complete name: | Ryuhei Yamaguchi |
| Born: | |
| Place of birth: |
Japan |
| Nationality: |
Japan |