ZB1 (ZEROBASEONE).

ZEROBASEONE (제로베이스원), also known as simply ZB1, is best described as a 5-member project group formed by MNET ‘s survival show BOYS PLANET. The lineup includes Sung Han Bin, Kim Ji Woong, Seok Matthew, Kim Tae Rae, and Park Gun Wook. Additional background says that they are managed by WAKEONE Entertainment and their contract will last for two years and a half. Their debut took place on July 10, 2023, with their debut mini album, YOUTH IN THE SHADE. Another profile detail is that For their Japanese promotions ZB1 will be managed by LAPONE Entertainment. Additional background says that they made their Japanese debut in March 2024 with the single, “YURA YURA”. The profile also notes that Originally a nine-member group, Zhang Hao, Ricky, Kim Gyu Vin, and Han Yu Jin concluded their activities with the group on March 15, 2026, following their contact expiration and returned to YH Entertainment.