Hello! Project
On October 19, 2008, Hello! Project announced its entire Elder Club would be graduating on March 31, 2009. On February 1, 2009, at the Yokohama Arena, Hello! Project held its largest concert ever—the —featuring 21 groups and 72 members. During the concert, former Hello! Project leader Yuko Nakazawa passed her leadership position to Morning Musume leader Ai Takahashi.