Choo Ji Min, known professionally as JM, is a South Korean singer, dancer and member of JUST B (저스트비).
Before debuting, he appeared in "I-LAND" representing his agency, Bluedot Entertainment (블루닷엔터테인먼트) and he had been a trainee for 11 months.
He made his debut in June 2021 with the group's first mini-album, "Just Burn".
In September 2024, JUST B will join ATBO to form a special project group called THE CREW ONE (더크루원) to participate in the survival show "Road to Kingdom Season 2".