Queen's Park Rangers says that Yun Suk-Young is "quick with and without the ball...a threat going forward...known for being able to handle the physical side of the game".
A player profile published on their website says he "promises to be a valuable addition to the R's squad".
QPR have signed South Korean international Yun Suk-Young on a three-and-a-half year deal.
The 22-year-old is a highly-rated left-back, who was part of the Olympic squad that won bronze for South Korea at London 2012.
Yun has been linked to a number of clubs in recent times, including west London rivals Fulham, but has joined QPR on for an undisclosed fee from K-League side Chunnam Dragons.
He's Harry Redknapp's third signing as QPR manager.