First rose to fame in the 1990s as a member of the South Korean boy band Sechs Kies. After the group's dissolution in 2000, he embarked on a solo career. In 2016, SechsKies made a comeback.
He was studying abroad in Hawaii when he was scouted by DSP Entertainment. Then, in 1997, he debuted with the group SechsKies.
In 1998, he acted in the film Seventeen: The Movie.
He is often referred to by the nickname Hoony. His sister, Kang Yoon-ji, is also a singer.
Like Park Bom, he is a well-known South Korean pop singer.