| K League 1 2021 Relegation - Appearances as Referee |  |
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| 04/12/2021 | Pohang Steelers | - | FC Seoul | 1:2 | 4 | - | - |
| K League 1 2021 Relegation - Appearances as Referee | |
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|
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| 04/12/2021 | Pohang Steelers | - | FC Seoul | 1:2 | 4 | - | - |
| Complete name: | Woo-sung Kim |
| Born: | 28/05/1987 |
| Place of birth: |
South Korea |
| Nationality: |
South Korea |