30 Years Old
Lee Seung Jun, better known by his stage name J-US, is the leader, vocalist and dancer of the boy group ONF. On December 27, 2021, he enlisted as an active-duty soldier.
Seoul, South Korea on 13th January 1995
![ONF [FOCUS ON AND OFF] Image](https://www.themoviedb.org/t/p/w220_and_h330_face//Au7UBGXv8opgUV1V7lUzl4Bu2i2.jpg)
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2 Image](https://www.themoviedb.org/t/p/w220_and_h330_face//whume1STRxwi0EVBYU8ZMk669nG.jpg)
![온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 2 Image](https://www.themoviedb.org/t/p/w220_and_h330_face//6DhiTgCYAg09SDRLGCktfByp6xD.jpg)
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1 Image](https://www.themoviedb.org/t/p/w220_and_h330_face//zyN3yVwFR1NoZGgxd77aZ4etce7.jpg)
![2025 ONF CONCERT [THE MAP:STRANGER’S PATH] Image](https://www.themoviedb.org/t/p/w220_and_h330_face//pvF5lXWpkD3HuDDJSXeXtKXlZD1.jpg)
![ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE] Image](https://www.themoviedb.org/t/p/w220_and_h330_face//4wjPi5x2igYJI9jrbE5QcJhSW8X.jpg)