한 Members of Y2K Y2K (와이투케이) was a South Korean Boy Group that debuted in 1999. They retired in 2002 with a 3 artist final line-up. Return to Artist Read All Members 1999200020012002 Ko JaegeunCoziYuichi Ko Jaegeun (고재근) Full Name: Ko Jaegeun Date of Birth: 1977-09-15 (49 years) Zodiac sign: Virgo Country: South Korea Active period: 1999-2002 Role: Leader,Vocal Cozi (코지) Full Name: Matsuo Koji Date of Birth: 1984-05-07 (42 years) Zodiac sign: Taurus Country: Japan Active period: 1999-2002 Role: Vocal,Instrumental Yuichi (유이치) Full Name: Matsuo Yuichi Date of Birth: 1982-02-22 (44 years) Zodiac sign: Pisces Country: Japan Active period: 1999-2002 Role: Vocal,Instrumental Images No images yet Return to Artist