| K League 1 2013 Relegation - Appearances as Referee |  |
 |
 |
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| 05/10/2013 | Gangwon FC | - | Gyeongnam FC | 2:1 | 4 | - | - |
| 26/10/2013 | Gyeongnam FC | - | Jeju United | 1:2 | 3 | - | - |
| 23/11/2013 | Chunnam Dragons | - | Gangwon FC | 1:0 | 4 | - | - |
| K League 1 2013 Relegation - Appearances as Referee | |
|
|
||||
| 05/10/2013 | Gangwon FC | - | Gyeongnam FC | 2:1 | 4 | - | - |
| 26/10/2013 | Gyeongnam FC | - | Jeju United | 1:2 | 3 | - | - |
| 23/11/2013 | Chunnam Dragons | - | Gangwon FC | 1:0 | 4 | - | - |
| Complete name: | Hee-sun Ryu |
| Born: | |
| Place of birth: |
South Korea |
| Nationality: |
South Korea |