Career as a coach
| Period | Team | Country | Position | |
|---|---|---|---|---|
| 01/2026 - 06/2026 |  | South Korea |  South Korea | Manager |
| 07/2024 - 06/2026 | | South Korea | South Korea | Manager |
| 01/2021 - 12/2024 |  | Ulsan HD FC | South Korea | Manager |
| 01/2016 - 05/2017 |  | Zhejiang Professional |  China | Manager |
| 06/2013 - 07/2014 | | South Korea | South Korea | Manager |
| 02/2009 - 10/2009 |  | South Korea U20 | South Korea | Manager |
National teams managed
| Season | Team | Position | |
|---|---|---|---|
| World Cup 2026 Canada/Mexico/USA | | South Korea | Manager |
| Friendlies 2026 | | South Korea | Manager |
| Friendlies 2025 | | South Korea | Manager |
| WC Qualifiers Asia 2023-2025 | | South Korea | Manager |
| Friendlies 2024 | | South Korea | Manager |
| World Cup 2014 Brazil | | South Korea | Manager |
| Friendlies 2014 | | South Korea | Manager |
| Friendlies 2013 | | South Korea | Manager |
| Olympic Games 2012 London | | South Korea | Manager |
| U19 Friendlies 2010 | | South Korea U19 | Manager |
| U20 World Cup 2009 Egypt | | South Korea U20 | Manager |
Career as a player
| Period | Team | Country | Position | # | |
|---|---|---|---|---|---|
| 01/2003 - 12/2004 |  | Los Angeles Galaxy |  USA | Defence | 18 |
| 01/2002 - 12/2002 |  | Pohang Steelers | South Korea | Defence | |
| 01/1999 - 12/2001 |  | Kashiwa Reysol |  Japan | Defence | 20 |
| 01/1998 - 12/1998 |  | Shonan Bellmare | Japan | Defence | 20 |
| 06/1997 - 12/1997 | | Shonan Bellmare | Japan | Defence | 37 |
| 01/1992 - 05/1997 | | Pohang Steelers | South Korea | Defence | |
| 01/1990 - 12/1990 |  | Korea University | South Korea | Defence |
Club matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Major League Soccer | 40 | 36 | 4 | 5 | 3.530 | - | - | - | 7 | - | - | » All matches |
| J1 League | 114 | 114 | - | 5 | 10.740 | 7 | - | - | 14 | 1 | 1 | » All matches |
| Total | 154 | 150 | 4 | 10 | 14.270 | 7 | - | - | 21 | 1 | 1 |
International matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | World Cup | 16 | 16 | - | 3 | 1.409 | 2 | - | 1 | 1 | - | - | » All matches |
| Friendlies | 10 | 10 | - | 2 | 855 | - | - | - | 3 | - | - | » All matches |
| Confederations Cup | 3 | 3 | - | - | 270 | - | - | - | - | - | - | » All matches |
 | Gold Cup | 2 | 2 | - | 1 | 136 | - | - | - | - | - | - | » All matches |
 | Asian Cup | 7 | 7 | - | - | 635 | - | - | - | - | - | 1 | » All matches |
| Total | 38 | 38 | - | 6 | 3.305 | 2 | - | 1 | 4 | - | 1 |