2AM debuted in 2008 under JYP Entertainment. A subunit of One Day (made up of 2AM and 2PM), 2AM has four members: Lee Chang Min (Changmin), Im Seul Ong (Seulong), Jo Kwon (Jo Kwon), and Jeong Jin Woon (Jinwoon). The group is known for their emotional singing and moving ballads, which fits the group name given to them by Jin Young Park, who mentioned that the name 2AM “reflects the band’s sensitivity by capturing the feeling of the early morning, a time when you can sit back and reflect upon your day.” The group’s approachable personalities are also notable, as they are often called upon to MC for or participate various television shows (i.e., “We Got Married”, “Dream High 2,” “A Song For You”). They have also been very active with collaborative and individual music projects ( Jo Kwon’s I’m Da One, Jinwoon’s “You Walking Towards Me”).
The group is active in Korea and in 2012 began their forays into the Japanese music market.