Kim Youngwoon (born January 17, 1985), better known by his stage name Kang-in, is a singer, entertainer, and a member of Korean boy band Super Junior. He was one of the three MC's for M.NET's M!Countdown along with bandmates Leeteuk and Shindong before he was replaced by Eunhyuk. He was also a former DJ for Reckless Radio where Super Junior members often visited as guests, but is now replaced by bandmate Sungmin. He is currently a DJ for MBC's Good Friend Radio with Taeyeon of Girls' Generation.
Kang-in was scouted by a talent agent and was recommended to sign up for SM Entertainment's talent competitions. In 2002, Kang-in won first place on the fourth annual SM Youth Best Contest and won the best outward appearance award and signed a contract with SM Entertainment.
Along with Hero, U-Know and future band mate Heechul, SM Entertainment placed them in a small project music group called Four Seasons, with each of the four members representing the four seasons of the year. The prospective group never came through; both Hero and U-Know were chosen to join another all-male singing group TVXQ, which debuted in December 2003. With two members gone, the idea of Four Seasons dropped. Kang-in and Heechul were then placed in Super Junior along with ten other trainees under the same company. This project group managed through well, and they debuted two years later in November 6, 2005 under the name Super Junior 05, the first generation of Super Junior.
During his career with Super Junior, Kang-in was put into two subgroups, smaller groups that is branched off of the larger Super Junior group. In February 2007, he was placed in the trot-singing Super Junior-T. A year later, he became a member of Super Junior-Happy
Active in television appearances and hosting, Kang-in earns the highest salary in Super Junior. Five days after Super Junior 05's debut performance, Kang-in became the MC of Mnet's M!Countdown along with Leeteuk and Shindong. The trio stayed as the hosts throughout the remaining year until Kang-in was replaced by Eunhyuk in mid 2006 due to his busy schedule for hosting Reckless Radio and MBC's music program, Show! Music Core.
Kang-in also became the television host for two of MBC's popular entertainment programs, Sunday Sunday Night Dong-An Club and Nothing is Impossible. Holding a strong contract with MBC, Kang-in left Reckless Radio in June 2007 to host MBC's Good Friend Radio with Cho Jungrin. In April 2008, Cho's hosting spot was replaced by Taeyeon. Kang-in's last day of hosting the program was on April 19, 2009.From December 2008 to May 2009, Kang-in and actress Lee Yoon-ji played as a low-income college couple for the popular MBC reality show We Got Married.