Wikipedia
Jung Yun-ho (; born February 6, 1986), also known by his stage name U-Know Yunho or simply U-Know, is a South Korean singer, actor, and a member of the pop duo TVXQ. Born and raised in Gwangju, South Korea, Yunho auditioned for the Korean talent agency S.M. Entertainment in 2001. After over two years of training, Yunho debuted with TVXQ in December 2003.
Fluent in both Korean and Japanese, Yunho has achieved commercial success throughout Asia as a member of TVXQ. Known as "Asia's Stars" and the "Kings of K-Pop", TVXQ have released fifteen studio albums and performed on record-breaking concert tours; their sixth Japan-wide tour, the Time Tour, was the highest-grossing concert tour ever held by a foreign music act in Japan. TVXQ are the first non-Japanese music act to hold a concert in the Nissan Stadium, Japan's largest outdoor stadium. According to the Oricon, TVXQ records the most number-one singles for a foreign music act in Japan. They have since sold over 9.3 million albums there, making them Japan's best-selling foreign artists.