K

K (케이) is the performance leader and center of &TEAM, a nine-member boy group under YX Labels (formerly HYBE Labels Japan). Born Koga Yudai (古賀祐大) on October 21, 1997, in Chiba, Japan, K is the oldest member of the group and commands its stage presence with 28 years of life experience behind every movement. Before &TEAM, K carved out one of the most storied pre-debut paths in the group. He trained in dance in the United States, attended EXPG studio in Sendai, and competed on I-LAND in 2020 -- reaching the final episode before narrowly missing the ENHYPEN lineup. He and RIIZE's Shotaro trained at the same dance academy. After I-LAND, K entered the &AUDITION survival program and secured his place in the final nine announced September 3, 2022. &TEAM debuted December 7, 2022, with the mini album First Howling: ME. Their Korean debut followed October 28, 2025, with Back to Life -- a milestone that came with a triple crown on The Show, Show Champion, and Music Bank in November. K holds the representative color green and the crown emoji. His MBTI is INFP. He turned down a full athletic scholarship for his running achievements to pursue dance, a decision that defines his entire approach to the craft.