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CompanyPlay M Entertainment
FandomOnly B
Year Debut2021
Year Active2
Year DisbandedN/A

Not Ranked



JUST B (저스트비; short for Just Burn) is a six-member South Korean (Kpop) boy group under Bluedot Entertainment. JUST B debuted on June 30, 2021. Their members are Geonu, Bain, JM, Lim Jimin, DY, and Sangwoo.

# of Members6
MembersGeonu, Bain, JM, Lim Jimin, DY, Sangwoo
Oldest MemberGeonu (born Feb 2, 2001)
Youngest MemberSangwoo (born Sep 3, 2002)
LeaderLim Jimin
DebutJun 30, 2021
CompanyBluedot Entertainment
FandomOnly B

JUST B Member Ages

JUST B Age Ranking

Ranked from oldest to youngest.

1. GeonuFeb 02, 200122 years old
2. BainMay 04, 200122 years old
3. Lim JiminMay 22, 200122 years old
4. JMOct 11, 200122 years old
5. DYFeb 21, 200221 years old
6. SangwooSep 03, 200221 years old

JUST B Member Heights

JUST B Height Ranking

Ranked from tallest to shortest.

1. Sangwoo1.82 m (6'0")
2. Bain1.82 m (6'0")
3. Lim Jimin1.78 m (5'10")
4. Geonu1.76 m (5'9")
5. DY1.75 m (5'9")
6. JM1.73 m (5'8")

Members and Position(s)


JUST B is composed of six members born between 2001 and 2002. The oldest member is Geonu (born Feb 2, 2001). The youngest member is Sangwoo (born Sep 3, 2002). All of the members of JUST B were born in South Korea. Most members had some exposure to the Kpop scene prior to debuting. Geonu and JM were part of I-LAND. Bain and DY were part of the survival show Under Nineteen. DY debuted with the winning group 1THE9.


Geonulead vocalist
Bainmain vocalist, lead dancer
Lim Jiminleader, main dancer, lead vocalist, visual
JMsub vocalist, visual
DYmain dancer, main rapper, sub vocalist
Sangwoolead dancer, sub vocalist, maknae

Fun Facts and Trivia

  • The oldest member of JUST B is Geonu (born Feb 2, 2001).
  • The youngest member or maknae of JUST B is Sangwoo (born Sep 3, 2002).
  • Geonu and JM were participants of the survival show I-LAND, which formed ENHYPEN.
  • Seunghwan (1THE9) and Jinsung (1THE9) were part of the pre-debut group. They left the agency prior to the debut of JUST B.
  • Just B means “Just Burn”. Burn represents the determination to work with a burning passion


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