Entertainment Ariola Japan United Asia Management Associated acts One Day 2PM JYP Nation Website http://2am.jype.com http://2am.ibighit.com Members Jo Kwon Jinwoon Seulong Changmin 2AM is a South Korean four-member ballad boy band under JYP Entertainment . The members are Jo Kwon , Jinwoon, Seulong, and Changmin. 2AM is one of the two subgroups