Shion Tsurubo
He is a member of the JPop group JO1 which got found trought the survival show Produce 101 Japan. Shion ended on the show at #5. Before his debut he used to be trainee under the Korean company FNC Entertainment for about 1 year. Other than that he was in avocal competition some years before where he first ever met his group member Ruki.
A: "Who was this dude on Produce Japan who was in a KPop-agency before?"
B: "Shion Tsurubo. He debuted with JO1"
B: "Shion Tsurubo. He debuted with JO1"