When he was in middle school, he was not a highly regarded prospect as coaches viewed his slight frame as a disadvantage.

[5] He scored his first senior goal with a direct free kick in the 2010 J.League Cup against Kyoto Sanga FC.

After his first season, Kim transferred to Omiya Ardija,[6] because FC Tokyo was relegated to the second tier by finishing 16th in the league.

Kim also played the 2009 Asian Indoor Games for the South Korea national futsal team.

Afterwards, he was named in the primary list for the 2011 AFC Asian Cup, but he wasn't selected for the final squad.

Kim was a member of South Korea's squad for the 2014 FIFA World Cup and started in all of the team's group matches.

He showed outstanding plays unlike four years ago, becoming a great leader of South Korean defenders.