4MEN (포맨) is a three-member group under MAJOR9 Entertainment. The group originally consisted of four members when they made their debut in February 1998.
Over the years, the group has released songs that became massive hits in Korea. However, the group also had member changes and additions. By 2014, 4MEN became a duo consisting of Shin Yong Jae and Kim Won Joo. Ultimately, the remaining members' contracts reached their expiration and both decided not to renew.
In 2021, MAJOR9 Entertainment announced that the group would have its revival with all-new members dubbed as the 4th generation of 4MEN—Haeun, Yosep, and Hanbin.