- On YG Treasure Box Jungwhan was in Team C.
- He was a member of K Tigers and has a 4th dan black belt in Taekwondo.
- He was a child model who appeared in CFs and played cameos on dramas.
- He's very shy and gets nervous when talking to girls.
- On July 16, 2021, Junghwan was confirmed to be COVID-19 positive and took a break to recover.