Kim Jae-duck (김재덕) is a South Korean singer, rapper, dancer and choreographer, he is the lead rapper and lead dancer of the first generation idol boy groups SECHSKIES (젝스키스) and J-Walk under YG Entertainment.
After SECHSKIES' sudden disbandment in 2000, Jaeduck said he wanted to become a dance instructor at their company, Daesung Entertainment (now known as DSP Media), but ended up forming a duo with fellow member Jang Suwon, going on to re-debut together in 2002 in the group J-Walk.
After a few years of promotion with J-Walk and his mandatory military service, Jaeduck had reunited with SECHSKIES, having a reunion concert through the variety show Infinite Challenge. The group had later signed a contract with YG Entertainment to start promotions again.