Kang Yoon-sung (born November 16, 1983), better known by his stage name K, is a South Korean singer under contract in Japan.
He was born in Goyang.
In 2004, after achieving little success with his first album in South Korea, K crossed over to Japan.
[1] His first Japanese album, Beyond the Sea, has achieved a sales of over 300,000 copies.
K put his musical activities on hold in 2010 so he could complete the Korean mandatory military service.