Seungjun , formerly J-US (제이어스) (승준)

Lee Seung-jun, known professionally as Seungjun and previously under the stage name J-US (제이어스), is a South Korean artist affiliated with the boy group ONF as a member of its sub-unit OFF Team. Born on January 13, 1995, he performed under the J-US name before transitioning to his current stage identity.

The available material does not support additional sections on discography, chart achievements, or broader career narrative without risking fabrication. A fuller profile would require sourced details on his solo or unit releases, award history, and role within ONF's wider activity.