Kep1er
케플러
Gen 4 Group · Female Debuted 2022 Active
A multinational girl group formed through the Mnet survival show Girls Planet 999 that debuted in 2022. It started as a time-limited project but extended its activities and now continues as a six-member group.
Basic info
- Debut
- January 3, 2022 · Debut song WA DA DA
- Debut agency
- WAKEONE / Swing Entertainment
- Current agency
- WAKEONE / KLAP Entertainment
- Years active
- 2022–
- Fandom
- Kep1ian케플리안
- Meaning of the Name
- The name combines 'Kep', for catching dreams, with '1', for uniting as one to become the best. Its pronunciation comes from the astronomer Kepler.
- Meaning of the fandom name
- It means people who support Kep1er and share the same dream.
- Generation
- 4th Gen (2018–2022)
- Number of members
- 6 members· 3 former members
Group Story
The group was formed with nine members chosen on Mnet's 'Girls Planet 999' in 2021. They debuted on January 3, 2022 with their first mini album 'FIRST IMPACT'.
They mostly performed bright, energetic dance tracks like their debut song 'WA DA DA'. Star-themed songs such as 'Galileo' and 'Shooting Star' followed.
Their debut album sold about 400,000 copies and topped the Gaon Album Chart. In September 2022 they also debuted in Japan with the Japanese single 'FLY-UP'.
After lineup changes they became a six-member group, and released their 8th mini album 'CRACK CODE' in March 2026.
Members
| Stage name | Real name | Birthday | Position |
|---|---|---|---|
| Choi Yujin 최유진 | 최유진 | August 12, 1996 | Leader |
| Xiaoting 샤오팅 | 선샤오팅 | November 12, 1999 | |
| Kim Chaehyun 김채현 | 김채현 | April 26, 2002 | |
| Kim Dayeon 김다연 | 김다연 | March 2, 2003 | |
| Hikaru 히카루 | 에자키 히카루 | March 12, 2004 | |
| Huening Bahiyyih 휴닝바히에 | July 27, 2004 | Maknae | |
| Mashiro 마시로 Former members | 사카모토 마시로 | December 16, 1999 | |
| Kang Yeseo 강예서 Former members | 강예서 | August 22, 2005 | |
| Seo Youngeun 서영은 Former members | 서영은 | December 27, 2004 |
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Signature songs
- 2022 WA DA DA YouTube Spotify
- 2022 Up! YouTube Spotify
- 2023 Giddy YouTube Spotify
- 2023 Galileo YouTube Spotify
- 2024 Shooting Star YouTube Spotify
Links go to each service's search results. Lyrics are not included for copyright reasons.
Key releases
- 2022.01 FIRST IMPACT1st mini album
Debut album, title track WA DA DA - 2022.06 DOUBLAST2nd mini album
Title track 'Up!' - 2022.09 FLY-UP1st Japanese single
- 2022.10 TROUBLESHOOTER3rd mini album
- 2024.06 Kep1going On1st studio album
Title track 'Shooting Star' - 2024.11 TIPI-TAP6th mini album
- 2025.08 BUBBLE GUM7th mini album
- 2026.03 CRACK CODE8th mini album
Major awards
- Favorite New Artist, 2022 MAMA
- Super Rookie Award, 2022 K Global Heart Dream Awards
- Female Idol Rookie Award, 2022 Brand Customer Loyalty Awards
Key records and stories
- The debut album 'FIRST IMPACT' topped the Gaon Album Chart.
- In July 2024, Mashiro and Kang Yeseo left when their contracts expired, while the remaining members extended their activities.
- Seo Young-eun, who had been on a break since July 2025 due to health issues, left the group in March 2026, making it a six-member group.
- Surpassed one million cumulative album sales just 10 months after debut.
- Their Japanese debut single 'FLY-UP' reached No. 2 on the Oricon weekly chart and was certified Gold by the Recording Industry Association of Japan.
- Since September 2024, WAKEONE and Clap Entertainment have jointly managed the group.