Kan Jong-woo (Korean: 간종우; born April 11, 1982) is a South Korean singer and songwriter. He is a twin brother of singer Kan Jong-wook. They have formed a K-pop vocal duo called J2 (Korean: 제이투) in 2010. Their first single "Missing" was used as the title track for movie Man of Vendetta. They have written and sang many K-pop songs including major South Korean national TV shows' OSTs like Apgujeong Midnight Sun, Royal Family, Princess Aurora, Pink Lipstick, Bravo, My Love!, and Gloria.