KPOP 2nd generation · B1A4 Company / RBW Japan
B1A4
ビーワンエーフォー / 비원에이포
B1A4 built a reputation on bright pop and on members who write their own material, and the group now continues as CNU, Sandeul and Gongchan.
- 2011DebutApr 23, 2011
- 3Members
- 2thGeneration
- BANAFandom
Last updated:
01
In 30 seconds: B1A4
O.K and Beautiful Target are the easy way in; What's Happening, Lonely and Solo Day are where the writing credits start to matter.
Come here for a late second-generation group that stayed close to its audience and kept making records after two members left.
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Key facts
- Group name
- B1A4
- Reading / Hangul
- ビーワンエーフォー / 비원에이포
- Company
- B1A4 Company / RBW Japan
- Debut date
- April 23, 2011
- Days active
- 5,670 days (15 years, 6 months)
- Debut song
- O.K
- Generation
- 2nd generation
- Fandom name
- BANA
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Member guide
Profile comparison
| Members | Birth date | Blood type | MBTI | Nationality | ||
|---|---|---|---|---|---|---|
| シヌゥ | 1991-06-16 | 35 | 182cm | A | Not disclosed | South Korea |
| サンドゥル | 1992-03-20 | 34 | 178cm | A | Not disclosed | South Korea |
| ゴンチャン | 1993-08-14 | 33 | 181cm | A | Not disclosed | South Korea |
Ages are as of 2026-10-31.
Selected releases
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Start here
Follow a few songs from the starting point to the group's current sound.
What's Happening? MVWhat's Happening? is where the members' own writing starts shaping the singles.
Lonely MVLonely is the ballad the group is best remembered for and the clearest showcase for the voices.
Rewind MVRewind belongs to the current line-up and shows what the group sounds like as three.MVView in JapaneseDance PracticeView in JapanesePerformanceView in JapaneseLiveView in JapaneseStageView in Japanese
View all official videos →05
From debut to now
- 2011Debuted from WM Entertainment and widened recognition as a bright pop group with O.K and Beautiful Target.
- 2013What's Happening? is the central song for anyone catching up with B1A4, a bright and highly catchy entrance.
- 2014Lonely showed an aching melody and Solo Day a light summer feel, making the range of B1A4's songs easy to read.
- 2016A Lie, from Good Timing, is the key entrance for following B1A4's melodies and their part in the writing.
- 2018After the contracts of Jinyoung and Baro ended, the group moved to carrying on around CNU, Sandeul and Gongchan.
- 2020The album Origine and Like a Movie, made as three, set out the soft pop feel of the later B1A4.
- 2024REWIND, from CONNECT, showed a return as a long-running group and the voices as they sound now.
- 2026SET - EP and Rock Paper Scissors opened the newest way into B1A4 in 2026.
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Achievements
Key milestones
Verified information
Verified English information is not yet available for this section.
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Official links
Official site
Official social accounts and platforms
Shopping guide
Verified English shopping links are not yet available.
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KPOP DISCOVER's B1A4 note
What anchors B1A4 is bright pop living alongside songs the members write themselves. The five-piece debuted from WM Entertainment on April 23, 2011. O.K, released straight away, and Beautiful Target after it showed a presence built on an easy brightness, matching a name taken from the A4 of a loose-leaf sheet. The closeness to the fandom, called BANA, is another reason B1A4 carries its own air among the later second-generation groups.
Starting with What's Happening? gives the clearest view. That song from 2013 is packed with the lightness and humour particular to B1A4 and still works as the way in for anyone catching up. Lonely from the same stretch turns the other way, an aching melody out front that shows how wide the range is. Solo Day in 2014 has the airiness of summer, and A Lie in 2016 is the key track for following the members' part in the writing and the layering of feeling. Put those four side by side and the quieter side comes through as well as the brightness.
After the contracts of Jinyoung and Baro ended in 2018, the group moved to three: CNU, Sandeul and Gongchan. Origine and Like a Movie in 2020 set out the soft pop feel of the trio, and REWIND, on Connect in 2024, delivered the voices of a long-running group as they sound now. At the end of 2025 they left WM and set up B1A4 Company, and Set in 2026, carrying Rock Paper Scissors, completed the newest form. What's Happening?, then Solo Day, then REWIND covers the core of the bright pop, the summer lightness, and the present as three.
Editors' take What's Happening? / Solo Day / REWIND. A B1A4 Company trio that has spent 15 years renewing bright pop and its own writing.
Trivia worth knowing
Entry point
Hearing What's Happening?, Lonely and A Lie first sorts B1A4 into brightness, melody and self-written colour.
Japan
Releases made for Japan are numerous, so the Japanese versions and local singles need a line of their own apart from the Korean B1A4 catalogue.
Line-up
Main B1A4 activity now runs as a trio of CNU, Sandeul and Gongchan, and the presentation differs from footage of the original five.
Videos
The official B1A4 channel gathers music videos, Dance Practice and Making Film, while recent KBS and it's Live sessions have become entry points of their own.
Production
Separating the songwriting context of the Jinyoung years from the softer pop of the three-piece era makes B1A4 easier to catch up on.
Comparison
Alongside ASTRO and INFINITE, the freshness, the melodies and the way B1A4 renews itself as a long-running act all invite comparison.
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Japan activity score
KPOP DISCOVER original metric
No. 9/ 241 groups
No. 9 of 241 groups with recorded activity in Japan (top 4%)
- 10Japanese releases
- 70Japan-related tracks
- 0Members from Japan
- 2Official Japanese accounts
The denominator is the 241 groups, out of 564 covered by KPOP DISCOVER, whose raw score reaches at least one point. The score adds 10 points per Japanese-market release, 3 per Japan-related track, 12 per member from Japan, and 8 per official Japanese account. Japanese-market releases carry the most weight because they are the most direct evidence of activity; related tracks add track-level detail; members from Japan stand for Japanese-language communication and continuity; official accounts stand for a permanent point of contact. The weights are an editorial judgement, not a statistical optimisation, and the ranking tracks release volume in Japan closely. Source: releases, tracks, members, and official links recorded by KPOP DISCOVER (updated 2026-10-28).
How this score is calculated →View in JapaneseFrequently asked questions
What defines B1A4?
O.K and Beautiful Target are the easy way in; What's Happening, Lonely and Solo Day are where the writing credits start to matter.
Why should a new listener start with B1A4?
Come here for a late second-generation group that stayed close to its audience and kept making records after two members left.
Which songs should a new listener try first?
Start with What's Happening?, Lonely, Rewind, then continue to the official video index.