Question: A singer who is a quarter Japanese, a quarter Chinese, and half German, is a member of a Japanese boy band that is managed by Johnny & Associates, and had an average age of what when they debuted?
Sentence (from "Sexy Zone"): Sexy Zone is the 5th group from Johnny & Associates to debut as special supporters for the "FIVB World Cup Volleyball" in 2011 after V6 (1995), Arashi (1999), NEWS (2003) and Hey!
Relevant evidence: No