Ya-Ya-yah is a Johnny's Jr. group from Johnny & Associates, which also produced groups such as SMAP, TOKIO, KinKi Kids, Arashi, NEWS and Tackey & Tsubasa. On September 24, 2007, members Kōta Yabu and Hikaru Yaotome debuted under Hey! Say! JUMP. As such, it is still unclear whether Ya-Ya-yah will continue to exist as a group as no official statement had been given by Johnny & Associates, but fans are hoping that the Kōta and Hikaru will continue to remain in the group much like how Nishikido Ryo shares his time equally between his two debuted groups NEWS and Kanjani8.
As of November 30, 2007 after the resignation of Taiyo Ayukawa from Johnny & Associates, Ya-Ya-yah has been removed from Johnny & Associates's official line-up. It is unclear what will happen to the remaining previous Ya-Ya-yah member Shoon Yamashita, who is currently still undebuted and remains a Johnny's Jr.