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Catch your eye, catch your mind. Hello, we are Kep1er!
(Catch your eye, catch your mind. 안녕하세요, 케플러입니다!)[1]


Kep1er (케플러; read as Kepler) is an upcoming nine-member project girl group under WAKEONE and Swing Entertainment. Formed through Mnet's reality survival show Girls Planet 999, they will debut on December 14, 2021.

Their name combines 'Kep', which means catching dreams, and the number 1, which means the nine girls coming together as one to be the best. It is also a reference to the planet 'Kepler'.

They will be active for roughly two and a half years on a special contract before they disband sometime in 2024.[2]


Pre-debut: Girls Planet 999

On January 11, 2021, Mnet released a teaser about the the upcoming auditions for the future competitive girl group reality show, Girls Planet 999.[3] It would consist of female contestants from or representing Korea, China, and Japan who all shared the same dream of debuting.

Girls Planet 999 premiered on August 6, 2021, while the live finale was broadcasted on October 22, 2021, with the girls who ranked in the top nine to debut in the show's product group Kep1er. During the finale, nine different contestants were revealed to make their debut; Kim Chaehyun ranked first overall and thus became the group's future center, Huening Bahiyyih ranked second overall, Choi Yujin ranked third, Kim Dayeon ranked fourth, Seo Youngeun ranked fifth, Kang Yeseo ranked sixth, Ezaki Hikaru ranked seventh, Sakamoto Mashiro ranked eighth, and finally, Shen Xiaoting ranked ninth overall and was the last contestant revealed to debut.

2021-present: Debut

On October 22, 2021, following the conclusion of Girls Planet 999, they opened the staff and group's Twitter, Instagram, and Facebook accounts.[4] On the group's social media accounts, a teaser was posted showcasing the group's official logo which had previously been revealed during the final episode of the show.[5]

On October 25, an article was published on Naver, revealing that the group would carry out their activities as a group for roughly the next two and a half years and are currently already starting preparations for their debut album.[2]

The group's fan cafe and V Live channel officially opened on November 2 and 3, respectively.[6][7] On November 4, Kep1er held their first V Live.[8] On November 9, the group’s first Youtube video was uploaded onto their Youtube channel.[9]

On November 22, the group's website officially opened, revealing that the group will debut in December.[10] On November 24, the group's SNS posted teaser photos and announced that they will make their debut on December 14, 2021.


Rank Name Nationality Position(s) Agency
English Korean Japanese Chinese
3 Choi Yujin 최유진 チェ・ユジン 崔有眞 Korean Leader Cube Entertainment
9 Shen Xiaoting 션샤오팅 シェン·シャオティン 沈小婷 Chinese N/A TOP CLASS Entertainment
8 Sakamoto Mashiro 사카모토 마시로 坂本 舞白 坂本 舞白 Japanese Co-Leader 143 Entertainment
1 Kim Chaehyun 김채현 キム・チェヒョン 金采炫 Korean N/A WAKEONE
4 Kim Dayeon 김다연 キム・ダヨン 金多娟 Korean N/A Jellyfish Entertainment
7 Ezaki Hikaru 에자키 히카루 江崎 ひかる 江崎 光 Japanese N/A Avex Artist Academy
2 Huening Bahiyyih 휴닝바히에 ヒュニン・バヒエ 休寧巴伊葉 Korean-American N/A IST Entertainment
5 Seo Youngeun 서영은 ソ・ヨンウン 徐永恩 Korean N/A Biscuit Entertainment
6 Kang Yeseo 강예서 カン・イェソ 姜睿序 Korean Maknae 143 Entertainment




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