KPOP 4th generation · WAKEONE
Kep1er
Kep1er / 케플러
Kep1er came out of Girls Planet 999 with members from three countries and a debut single that did a lot of the work.
- 2022DebutJan 3, 2022
- 9Members
- 4thGeneration
- Kep1ianFandom
Last updated:
01
In 30 seconds: Kep1er
The line-up shrank from nine over time, and the group has released in Japan as well as Korea throughout.
Choose this if you want a project group that kept getting better after the programme's momentum ran out.
02
Key facts
- Group name
- Kep1er
- Reading / Hangul
- Kep1er / 케플러
- Company
- WAKEONE
- Debut date
- January 3, 2022
- Days active
- 1,762 days (4 years, 9 months)
- Debut song
- WA DA DA
- Generation
- 4th generation
- Fandom name
- Kep1ian(ケプリアン)
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Member guide
Profile comparison
| Members | Birth date | Blood type | MBTI | Nationality | ||
|---|---|---|---|---|---|---|
| ユジン | 1996-08-12 | 30 | 162.1cm | A | ENFP-T | South Korea |
| シャオティン | 1999-11-12 | 26 | 168cm | AB | ISFJ | China |
| マシロ | 1999-12-16 | 26 | 158cm | AB | ISFP | Japan |
| チェヒョン | 2002-04-26 | 24 | 160cm | B | ISTP | South Korea |
| ダヨン | 2003-03-02 | 23 | 158cm | A | ESTJ | South Korea |
| ヒカル | 2004-03-12 | 22 | 154.5cm | O | ESFJ | Japan |
| ヒュニン・バヒエ | 2004-07-27 | 22 | 167cm | A | ESFJ | South Korea · United States |
| ヨンウン | 2004-12-27 | 21 | 159cm | A | INFP | South Korea |
| イェソ | 2005-08-22 | 21 | 157cm | A | ENFP | 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.
WA DA DA MVWA DA DA is the debut and the song that carried the group past the show it came from.
Up! MVUp! is the lightest and most cheerful of the singles.
Galileo MVGalileo is the most assured of the three and the best picture of the later group.MVView in JapaneseDance PracticeView in JapanesePerformanceView in JapaneseLiveView in JapaneseStageView in Japanese
View all official videos →05
From debut to now
- 2021Once the show wrapped, Kep1er launched as a project group drawn from several countries, and expectations ran high.
- 2022WA DA DA, the debut song, became the main way in, while the Dance Practice and the Choreography Video mattered just as much for reading the formations.
- 2023Giddy and Galileo showed a brighter, lighter Kep1er, unlike the force of the months right after the debut.
- 2024A Japanese 1st album, a Korean 1st album and the first work as a seven-piece followed one another, marking the pivot around the contract renewal through the releases themselves.
- 2025A Japanese 1st EP and a Korean 7th mini album spread the seven-piece era across both Japan and Korea.
- 2026KILLA (Face the other me) put forward a new picture of Kep1er after the departure of Youngeun.
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Achievements
Key milestones
Music show wins
Records
3 recordsMost recent broadcast first
Program / edition
| The Show | SBS Medianet | ||
| The Show | SBS Medianet | ||
| Show Champion | Shooting Star | MBC PLUS |
Each record is checked against its source. These are within the collected period, not lifetime totals.
Verified information
Verified English information is not yet available for this section.
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Official links
Official site
Kep1er Japan Officialkep1er.jpSony Music Japansonymusic.co.jpYouTubeyoutube.comAmazon Musicmusic.amazon.com
Official social accounts and platforms
Shopping guide
Verified English shopping links are not yet available.
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KPOP DISCOVER's Kep1er note
Two things anchor Kep1er: a multinational project born out of a survival show, and a range that runs from a forceful way-in song to far lighter expressions. Formed out of Girls Planet 999 and debuted by WAKEONE with WA DA DA on January 3, 2022, the group asks you to hold the memory of the show and the popularity of its members as the background to those early releases.
The span reaches from the force of WA DA DA to the brighter, lighter faces of Giddy and Galileo. Japanese releases such as Kep1going sit alongside the Korean ones, and through several changes of line-up the work has spread across both countries. Set the Dance Practice of WA DA DA next to the Choreography Video and the formations come into view.
After the widening of Up! and Galileo come TIPI-TAP, BUBBLE GUM and KILLA, recent work that turns both the sound and the visual direction. Taken as WA DA DA, then Up!, then Galileo, the order covers the debut period, the widening and the lightness.
Editors' take WA DA DA / Up! / Galileo — three songs cover the forceful way in and the lighter widening of a multinational project out of WAKEONE.
Trivia worth knowing
Programme
Kep1er came out of Girls Planet 999, so early on the memory of the programme and member popularity shape how the songs read.
Name
The numeral inside the group name is easiest to explain as members and fans becoming one.
Japan
Kep1going is the Japanese first album with 15 tracks, where Japanese versions of older songs matter as much as Straight Line.
Line-up
Splitting the run into nine-, seven- and six-member phases makes everything after Shooting Star easier to place.
Videos
WA DA DA repays watching the Dance Practice and Choreography Video next to the clip, where Kep1er's formations show.
Recent years
TIPI-TAP, BUBBLE GUM and KILLA point at recent years, when the sound and imagery of Kep1er swung a long way from before.
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Japan activity score
KPOP DISCOVER original metric
No. 43/ 241 groups
No. 43 of 241 groups with recorded activity in Japan (top 18%)
- 3Japanese releases
- 21Japan-related tracks
- 2Members 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 2026-10-29).
How this score is calculated →View in JapaneseFrequently asked questions
What defines Kep1er?
The line-up shrank from nine over time, and the group has released in Japan as well as Korea throughout.
Why should a new listener start with Kep1er?
Choose this if you want a project group that kept getting better after the programme's momentum ran out.
Which songs should a new listener try first?
Start with WA DA DA, Up!, Galileo, then continue to the official video index.