4Men (Korean: 포맨) is a South Korean R&B group formed in 1998. The group consists of two members: Shin Yong-jae and Kim Won-joo.Originally a four-member group composed of Yoon Min-soo, Jeong Se-young, Han Hyeon-hee and Lee Jeong-ho, 4Men released their debut album Four Men First Album on February 1, 1998. Two years later, they released their second album Ireoke Cheonildongan Moeumyeon Ibyeori Sarajindago Haetda on December 29, 2000. In 2001, Yoon Min-soo withdrew from the group and 4Men continued promotions as a three-member group until J1 joined the group in 2006. In 2008, all members withdrew from the group. However, following later that year, the group was revamped with three new members: Shin Yong-jae, Kim Young-jae and Kim Won-joo. 4Men currently promotes as a duo after Kim Young-jae's withdrawal from the group in 2014.