All Kep1Er Members, Ages, and Birthdays

Kep1er is a nine-member K-pop project girl group under a joint collaboration between Swing Entertainment and Wake One Entertainment. The group was formed through the MNET survival show Girls’ Planet 999: The Girls’ Saga and consists of nine members:

• Mashiro
• Yujin
• Dayeon
• Hikaru
• Huening Bahiyyih
• Xiaoting
• Chaehyun
• Youngeun
• Yeseo

Kep1er made its debut in 2022 with the EP First Impact and is set to promote for two years and six months before the member’s contracts expire. In 2022, the group won various awards, including the Best Choice Award at the Asia Artist Awards, the Global Hottest Award at The Fact Music Awards, and the Favorite New Artist Award at the MAMA Awards. 

The group also made its television debut in 2022 by participating in the second season of the idol girl group survival show Queendom. Kep1er has grown rapidly to become one of the most famous K-pop girl groups of the new decade, and after a brief break, the girls were set to make a much-anticipated comeback in March of 2023. With “I Do! Do You?” as its lead track, Kep1er released their second Japanese single Fly-By on March 15. The group released their fourth EP, Lovestruck! with the lead single “Giddy” on April 10, and their fifth EP, Magic Hour, with the lead single “Galileo” on Sept. 25.

To get acquainted with the members of Kep1er, here’s a list of the girls, as well as some of their personal details.

Mashiro

Sakamoto Mashiro was born on Dec. 16, 1999, in Tokyo, Japan. She is 23 years old and stands five feet, two inches tall. She is a singer, model, actress, and co-leader of the group, while also being known for her role as Hinami Akamichi in the Japanese TV show Seiken Sentai Ryukenger.

She was a trainee under JYP Entertainment in 2016 but moved to Pledis Entertainment two years later. She stayed as a trainee at Pledis for just one year before moving over to her current agency, 143 Entertainment, in 2021.

Yujin

Choi Yu Jin was born on Aug. 12, 1996. She is 27 years old and stands five feet, four inches tall. She is a singer, actress, and leader of the group. She graduated from Hanlim Multi Arts High School in 2015. Yujin is a former member of the girl group CLC under Cube Entertainment.

She made her acting debut in the 2016 drama Nightmare High and recently had a lead role in the 2022 web series Pumpkin Time. She was signed under Cube Entertainment in 2011, where she stayed for over a decade, and left in 2022. Yujin is currently under Wake One Entertainment.