Seung Jun Lee

Lee Seung Jun

  • Name: Lee Seung Jun
  • Native name: 이승준
  • Also Known as: Lee Seungjoon, Lee Seung Joon, Seungjun, J-US, 제이어스
  • Nationality: South Korean
  • Gender: Male
  • Born: January 13, 1995
  • Age: 29
Lee Seung Jun, formerly known as J-US and now known mononymously as Seungjun, is a South Korean singer, choreographer, and member of ONF (온앤오프; short for ON N' OFF). He graduated from Deoksu High School and was enrolled in the Musical Studies program at the International University of the Arts but dropped out. He later earned a bachelor's degree in Japanese from Hanyang Cyber University.

Before debuting, he was a trainee for 5 years and was introduced as part of WM Boys with their first appearance as B1A4's backup dancers at the 2016 Dream Concert in Seoul. He was featured as a dancer in the Korean version of the web drama "Loss:Time:Life" and gave a performance at IDOLCON just a few months before debuting.

He made his official debut in August 2017 as the group's OFF Team leader, lead dancer and sub-vocalist with their 1st EP, "ON/OFF." In 2018, the group signed a contract with Victor Entertainment (ビクターエンタテインメント) and made their Japanese debut and held a concert in Tokyo. He had his acting debut with a role in the web drama "Can I Step In?."

In 2021, all members (except U) decided to enlist for their mandatory military service around the same time, so he enlisted on December 27 and was discharged on June 26, 2023.

The group is now active again and is represented by WM Entertainment (WM엔터테인먼트).

(Source: MyDramaList) Edit Biography
Drama
Year Title # Role Rating
2020 Can I Step In?
Korean Drama, 2020, 10 eps
Sang Hae (Main Role)
10
Sang Hae
Main Role
7.5
TV Show
Year Title # Role Rating
2024 2024 Idol Star Athletics Championships Chuseok Special
Korean TV Show, 2024, 3 eps
(Regular Member)
3
Regular Member
7.8
2024 2024 SBS Gayo Daejeon: Summer
Korean TV Show, 2024, 1 eps
[Performer] (Regular Member)
1
[Performer]
Regular Member
8.0
2023 Gag Concert Season 2
Korean TV Show, 2023, 50 eps
(Ep. 1071) (Guest)
50
(Ep. 1071)
Guest
0.0
2022 Memory (Onf:)
Korean TV Show, 2022, 12 eps
(Regular Member)
12
Regular Member
8.0
2021 Adola School Season 2: Homecoming Day
Korean TV Show, 2021, 22 eps
(Ep. 12) (Guest)
22
(Ep. 12)
Guest
8.5
2021 Fan Finding Show: ONF
Korean TV Show, 2021, 2 eps
(Regular Member)
2
Regular Member
8.0
2021 Back to the Idol Season 2
Korean TV Show, 2021, 10 eps
(Ep.2) (Guest)
10
(Ep.2)
Guest
9.0
2021 Dive Into ONF
Korean TV Show, 2021, 6 eps
(Regular Member)
6
Regular Member
8.5
2021 Hyo Jung & Binnie's Sweet Home
Korean TV Show, 2021, 24 eps
(Ep.15) (Guest)
24
(Ep.15)
Guest
8.2
2021 Maddola: ONF
Korean TV Show, 2021, 3 eps
(Main Host)
3
Main Host
0.0
2021 Max Chang Min's Free Hug
Korean TV Show, 2021, 51 eps
(Ep. 17) (Guest)
51
(Ep. 17)
Guest
7.7
2021 Update on Your Real Characters' Taste
Korean TV Show, 2021, 18 eps
(Ep. 1) (Guest)
18
(Ep. 1)
Guest
10.0
2021 Fact iN Star Season 2
Korean TV Show, 2021, 36 eps
(Ep. 1-2) (Guest)
36
(Ep. 1-2)
Guest
8.3
2021 Rumor Offisherlock
Korean TV Show, 2021, 18 eps
(Ep. 1) (Guest)
18
(Ep. 1)
Guest
8.4
2021 Secret Friend of Idols Season 2
Korean TV Show, 2021, 19 eps
(Ep. 9-11) (Guest)
19
(Ep. 9-11)
Guest
8.3
2021 Studio Moon Night
Korean TV Show, 2021, 156 eps
(Ep. 19, 79) (Guest)
156
(Ep. 19, 79)
Guest
8.3
2021 Adola School
Korean TV Show, 2021, 32 eps
(Ep. 29) (Guest)
32
(Ep. 29)
Guest
0.0
2020 Fan Finding Show: ONF
Korean TV Show, 2020, 2 eps
(Regular Member)
2
Regular Member
7.8
2020 The Silence of IDOL
Korean TV Show, 2020, 26 eps
(Ep. 6) (Guest)
26
(Ep. 6)
Guest
8.3
2020 Idol Picknic: ONF
Korean TV Show, 2020, 2 eps
(Regular Member)
2
Regular Member
0.0
2020 Idol Human Theater
Korean TV Show, 2020, 104 eps
(Ep. 8, 18) (Guest)
104
(Ep. 8, 18)
Guest
8.4
2020 Idol League Season 3
Korean TV Show, 2020, 66 eps
(Ep. 13, 46, 62) (Guest)
66
(Ep. 13, 46, 62)
Guest
8.4
2020 Master Kwang of the Photo Studio
Korean TV Show, 2020, 20 eps
(Ep. 8) (Guest)
20
(Ep. 8)
Guest
0.0
2020 2020 Idol eSports Athletics Championships
Korean TV Show, 2020, 1 eps
[PUBG] (Guest)
1
[PUBG]
Guest
7.9
2020 Back to the Idol
Korean TV Show, 2020, 8 eps
(Ep. 1) (Guest)
8
(Ep. 1)
Guest
8.0
2020 Idol House
Korean TV Show, 2020, 18 eps
(Ep. 1) (Guest)
18
(Ep. 1)
Guest
8.2
2020 Idol Challenge: Another Class
Korean TV Show, 2020, 9 eps
(Ep. 2) (Guest)
9
(Ep. 2)
Guest
8.0
2020 Idol Workshop ONF
Korean TV Show, 2020, 5 eps
(Main Host)
5
Main Host
8.6
2020 Vogue Ship Show
Korean TV Show, 2020, 68 eps
(Ep. 34) (Guest)
68
(Ep. 34)
Guest
0.0
2020 IDOL VS. IDOL
Japanese TV Show, 2020, 80 eps
(Ep. 13-16, 53-56) (Guest)
80
(Ep. 13-16, 53-56)
Guest
8.2
2020 Idol Dabang Season 3
Korean TV Show, 2020, 10 eps
(Ep. 6) (Guest)
10
(Ep. 6)
Guest
7.2
2020 Sing and Stay Season 2
Korean TV Show, 2020, 9 eps
(Ep. 5) (Guest)
9
(Ep. 5)
Guest
8.0
2020 Idol Ability Market
Korean TV Show, 2020, 27 eps
(Ep. 11, 22) (Guest)
27
(Ep. 11, 22)
Guest
8.7
2020 Road to Kingdom
Korean TV Show, 2020, 8 eps
[Contestant] (Regular Member)
8
[Contestant]
Regular Member
8.5
2020 K-Bob Star
Korean TV Show, 2020, 18 eps
(Ep. 10) (Guest)
18
(Ep. 10)
Guest
8.5
2020 Victon's Duvet Kick
Korean TV Show, 2020, 75 eps
(Ep. 71) (Guest)
75
(Ep. 71)
Guest
7.4
2020 Secret Friend of Idols
Korean TV Show, 2020, 38 eps
(Ep. 28-29) (Guest)
38
(Ep. 28-29)
Guest
8.3
2020 Idol League Season 2
Korean TV Show, 2020, 23 eps
(Ep. 21) (Guest)
23
(Ep. 21)
Guest
7.9
2020 ‏2020 Idol Star Athletics Championships
Korean TV Show, 2020, 9 eps
(Regular Member)
9
Regular Member
7.9
2019 Boatta
Korean TV Show, 2019, 28 eps
(Ep. 22) (Guest)
28
(Ep. 22)
Guest
8.4
2019 Transonglation
Korean TV Show, 2019, 67 eps
(Ep. 5, 26, 46) (Guest)
67
(Ep. 5, 26, 46)
Guest
8.3
2019 Legend Club: Heechul’s Shindong PC Room
Korean TV Show, 2019, 6 eps
(Ep. 2) (Guest)
6
(Ep. 2)
Guest
7.9
2019 Convenience Store Restaurant
Korean TV Show, 2019, 250 eps
[Special MC] (Ep. 194-196) (Guest)
250
[Special MC] (Ep. 194-196)
Guest
8.3
2019 Hidden Track
Korean TV Show, 2019, 8 eps
(Ep. 4) (Guest)
8
(Ep. 4)
Guest
7.9
2019 2019 Idol Star Athletics Championships Chuseok Special
Korean TV Show, 2019, 6 eps
(Regular Member)
6
Regular Member
7.9
2019 Q&A Machine
Korean TV Show, 2019, 34 eps
(Ep. 11, 17) (Guest)
34
(Ep. 11, 17)
Guest
7.6
2019 Midnight Idol
Korean TV Show, 2019, 345 eps
(Ep. 248, 318, 335) (Guest)
345
(Ep. 248, 318, 335)
Guest
8.2
2019 5 Minutes to Six
Korean TV Show, 2019, 425 eps
(Ep. 388) (Guest)
425
(Ep. 388)
Guest
8.0
2019 Lunch Attack
Korean TV Show, 2019, 890 eps
(Ep. 403) (Guest)
890
(Ep. 403)
Guest
6.0
2019 TMI NEWS
Korean TV Show, 2019, 56 eps
(Ep. 26) (Guest)
56
(Ep. 26)
Guest
8.0
2018 Oh! My Crazy Idol
Korean TV Show, 2018, 24 eps
(Ep. 5-8) (Guest)
24
(Ep. 5-8)
Guest
9.0
2018 Mafia Dance
Korean TV Show, 2018, 26 eps
(Ep. 19) (Guest)
26
(Ep. 19)
Guest
8.4
2018 Idol Room
Korean TV Show, 2018, 87 eps
(Ep. 71) (Guest)
87
(Ep. 71)
Guest
8.0
2018 Idol League
Korean TV Show, 2018, 56 eps
(Ep. 12) (Guest)
56
(Ep. 12)
Guest
8.4
2017 MIXNINE
Korean TV Show, 2017, 14 eps
[Contestant] (Regular Member)
14
[Contestant]
Regular Member
7.0
2017 On & On
Korean TV Show, 2017, 90 eps
(Regular Member)
90
Regular Member
7.0
2017 On the Run
Korean TV Show, 2017, 28 eps
(Regular Member)
28
Regular Member
8.5
2015 King of Mask Singer
Korean TV Show, 2015, 485 eps
[Contestant] (Ep. 231-232) (Guest)
485
[Contestant] (Ep. 231-232)
Guest
8.1
2013 After School Club
Korean TV Show, 2013, 675 eps
(Ep. 278, 356, 389, 400, 434, 461, 484, 595) (Guest)
675
(Ep. 278, 356, 389, 400, 434, 461, 484, 595)
Guest
8.0
2011 Weekly Idol
Korean TV Show, 2011, 700 eps
(Ep. 361, 394, 471, 502, 525, 541, 633) (Guest)
700
(Ep. 361, 394, 471, 502, 525, 541, 633)
Guest
8.2
2011 Immortal Songs: Singing the Legend
Korean TV Show, 2011, 690 eps
(Ep. 364, 394, 647) (Guest)
690
(Ep. 364, 394, 647)
Guest
8.3
1998 Pops in Seoul
Korean TV Show, 1998, 6000 eps
(Guest)
6000
Guest
8.0
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Lee Seung Jun

Seung Jun Lee
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Details

  • First Name: Seung Jun
  • Family Name: Lee
  • Native name: 이승준
  • Also Known as: Lee Seungjoon, Lee Seung Joon, Seungjun, J-US, 제이어스
  • Nationality: South Korean
  • Gender: Male
  • Born: January 13, 1995
  • Age: 29

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