Byun Eui-joo (변의주; born September 7, 2002), known professionally as EJ (ウィジュ; 의주), is a South Korean singer under HYBE Labels Japan. He is the leader of the boy group &TEAM. Byun Eui-joo (변의주; born September 7, 2002), known professionally as EJ (ウィジュ; 의주), is a South Korean singer under HYBE Labels Japan. He is the leader of the boy group &TEAM.