Kim Jae-joong (; born January 26, 1986), also known
mononymously as
Jaejoong, is a
South Korean singer, songwriter, actor, director and designer. He is best known as a member of the Korean pop group
JYJ, and was one of the original members of
boy band TVXQ. Kim was also known by the stage names
Hero Jaejoong (in South Korea),
Jejung (ジェジュン) (in Japan), and
英雄在中 (영웅재중) (in China). Kim is now using Kim Jae-joong (JYJ) for his activities.