| K League 1 2012 Relegation - Appearances as Referee |  |
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| 28/10/2012 | Daegu FC | - | Daejeon Citizen | 4:1 | 3 | - | - |
| K League 1 2012 Relegation - Appearances as Referee | |
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| 28/10/2012 | Daegu FC | - | Daejeon Citizen | 4:1 | 3 | - | - |
| Complete name: | Hyung-jin Ko |
| Born: | |
| Place of birth: |
South Korea |
| Nationality: |
South Korea |