Kim Jae-joong, also known mononymously as Jaejoong, is a South Korean singer, songwriter, actor and director. He is a member of the Korean pop group JYJ and was one of the original members of boy band TVXQ. Since 2013, he has expanded his range of activities as a solo artist and is also known by the stage names Hero Jaejoong, Jejung/J-Jun (ジェジュン), and 英雄在中 (영웅재중).