Ya-Ya-yah was a Johnny’s Jr unit.
- Originally this group was formed with 7 members.
- The name’s group taken from initials of members’ name, those were Yabu, Akama, Yamashita, Ayukawa, Yoshida, Ando and H
- But then Ando Yasuhiro and Yoshida Yuuki left the group. They replaced by Yaotome Hikaru.
- Before Yuuki 100%, this group released a single under name YA-YA with four members (Yabu, Akama, Yamashita and Ayukawa)
- Yaotome Hikaru wrote lyrics for Ima Susumou and the members of Ya-Ya-yah wrote lyrics for Te wo Tsunaide Yukou.
- Yabu Kota and Yaotome Hikaru debuted as Hey! Say! JUMP in 2007.
- Ando Yasuhiro
- Akama Naoya
- Hoshino Masaki
- Yoshida Yuuki
- [2002.05.15] Yuuki 100%/Sekai ga Hitotsu ni Naru Made (勇気100%/世界がひとつになるまで)
- 2 of Us
- Ai kotoba wa Ya-Ya-yah (合言葉はＹＡ-ＹＡ-ＹＡＨ)
- Baby Babe
- Himawari no Melody (ひまわりのメロディ)
- Ima Susumou (今進もう)
- Itoshi no Playgirl (愛しのプレイガール)
- Jewel Star
- Just wannalovin’ you
- Kaze ni Notte (風に乗って)
- LET’S GO!
- LOVE together 2002
- Maybe your love
- Never Stop the Music
- Sekai ga Hitotsu ni Naru Mde (世界がひとつになるまで)
- Singin’ for you
- SummerxSummerxSummer! (サマー×サマー×サマー!)
- Te wo Tsunaide Yukou (手をつないでゆこう)
- To the Freedom
- Up Down Ya-Ya-yah
- SUMMARY 2005
- SHOW Geki SHOCK
- SHOCK~is Real Shock~
- Stand By Me
- DREAM BOY 2005
- One!-the history of Tackey-