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 "Marius Yo"): Born in Heidelberg, Germany, his father is German and his mother is former Japanese/ Chinese Takarazuka Revue actress, Akira Yo.
Relevant evidence: No