ZEROBASEONE

ZEROBASEONE (Korean: 제로베이스원; initialized as ZB1) is a South Korean boy group under WAKEONE Entertainment, formed through Mnet's 2023 reality competition show BOYS PLANET. The group is composed of five members: Sung Hanbin, Kim Jiwoong, Seok Matthew, Kim Taerae and Park Gunwook. Originally a nine-piece ensemble, former members Zhang Hao, Ricky, Kim Gyuvin and Han Yujin departed from the group in March 2026 following their contract expiration.