| J1 League 2015 1. Phase - Appearances as Referee |  |
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 |
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| 10/05/2015 | Montedio Yamagata | - | Kashiwa Reysol | 3:0 | 2 | - | - |
| J1 League 2015 1. Phase - Appearances as Referee | |
|
|
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| 10/05/2015 | Montedio Yamagata | - | Kashiwa Reysol | 3:0 | 2 | - | - |
| Complete name: | Hiromichi Oka |
| Born: | 02/10/1979 |
| Place of birth: |
Japan |
| Nationality: |
Japan |