Sep 7, 2015-present
Park Sung Jin (박성진) is the leader, main vocalist, and rhythm guitarist of the band Day6 under JYP Entertainment. He was born in Busan but went on to live on Seoul until he became a trainee of JYP.
On September 7, 2015, he made his debut as a member of Day6 and released their debut EP, The Day, with the lead single "Congratulations".
As of March 8, 2021, he is on hiatus from the group activities as he enlisted in the military for his mandatory military service, currently serving as an active duty soldier. He is planned to complete his duty on September 7, 2022.