If you run into older Johnny’s fans or just watch the older episodes of Shounen Club back when KAT-TUN was still a Junior group then Jimmy Mackey will be the name first given as an example of a half Junior. He was from the U.S. and while he had a rather big presence on Shounen Club for an ungrouped Junior, he was one of the main hosts during his time, it was pretty clear to see that his career was going nowhere. In early 2006 he quit the agency and returned to the States.
Needs Research