Lee Seungjoon
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.
Filmography
Weekly Idol
Star Road
Idol Radio
Road to Kingdom
Can I Step In?
![온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 1](https://image.tmdb.org/t/p/w300/6DhiTgCYAg09SDRLGCktfByp6xD.jpg)
온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 1
온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 2
![2025 ONF CONCERT [THE MAP:STRANGER’S PATH]](https://image.tmdb.org/t/p/w300/pvF5lXWpkD3HuDDJSXeXtKXlZD1.jpg)
2025 ONF CONCERT [THE MAP:STRANGER’S PATH]
Dive Into ONF
![ONF [FOCUS ON AND OFF]](https://image.tmdb.org/t/p/w300/Au7UBGXv8opgUV1V7lUzl4Bu2i2.jpg)
ONF [FOCUS ON AND OFF]
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1](https://image.tmdb.org/t/p/w300/zyN3yVwFR1NoZGgxd77aZ4etce7.jpg)
온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1
![ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE]](https://image.tmdb.org/t/p/w300/4wjPi5x2igYJI9jrbE5QcJhSW8X.jpg)
ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE]
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2](https://image.tmdb.org/t/p/w300/whume1STRxwi0EVBYU8ZMk669nG.jpg)
온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2
![2026 ONF CONCERT [THE MAP: BEYOND THE HORIZON]](https://image.tmdb.org/t/p/w300/vQmZPhEa8KrUCwrqRqMpl9pube9.jpg)
2026 ONF CONCERT [THE MAP: BEYOND THE HORIZON]