Hello! Project Shuffle Unit (ハロー!プロジェクトシャッフルユニット) was the name given to special annual units in Hello! Project composed of mixed members from current major units. Beginning in 2000, Shuffle Units were created for the purpose of shuffling around these members for releases and concerts as well as to promote friendly competition with a season-long collaboration to see which shuffle unit was able to sell the most copies of their single. By 2003, the competition idea was dropped and unit songs were all sold on the same single.
Shuffle Units were generally composed three to a year, included all current members of Hello! Project, and given a "theme" for their groups. The style of each song in a given year was varied; however, the groups all shared the same B-side.
After 2005, the concept of Shuffle Units was abandoned in favor of splitting Hello! Project into Wonderful Hearts and Elder Club due to the size of Hello! Project. These groups were followed by Hello! Project Mobekimasu, an all-member group similar to H.P. All Stars shuffle unit. In recent years, concerts have simply featured random and unofficial shuffling of members.
2000 Shuffle UnitsEdit
The theme for the 2000 Shuffle Units Akagumi 4, Aoiro 7, and Kiiro 5 was "Colors" ("Red", "Blue", and "Yellow" respectively). The B-side for this years singles was "Hello! no Theme", a pop-song that is now considered Hello! Project's theme song.
Due to the disbanding of T&C Bomber and graduation of some members shortly following the shuffle releases, 4th generation Morning Musume members Ishikawa Rika, Yoshizawa Hitomi, Kago Ai, and Tsuji Nozomi, as well as soloist Maeda Yuki, filled in as alternates during concerts and performances.
2001 Shuffle UnitsEdit
The theme for the 2001 Shuffle Units 3nin Matsuri, 7nin Matsuri, and 10nin Matsuri was "Festival" ("Cute Festival", "Raggae Festival", and "Traditional Fesitval" respectively). The B-side for this years singles was "Hello! Mata Aou Ne".
2002 Shuffle UnitsEdit
The theme for the 2002 Shuffle Units Happy♡7, Sexy 8, and Odoru♡11 was "Happy" ("Happy", "Sexy", and "Festival Barbie" respectively). The B-side for this years singles was "Yoku Aru Oyako no Serenade".
- Single: "Shiawase Desu ka?"
- Notes: Winner of the competition to sell the most amount of singles. Goto Maki later recorded a solo version of this song for her second solo album 2 Paint It Gold.
2003 Shuffle UnitsEdit
This is the first year in which all songs by the Shuffle Units were combined into one released single.
- Single: "Kowarenai Ai ga Hoshii no"
- Notes: As part of Minimoni, Takahashi and Todd remade the song for the second Minimoni album Minimoni Songs 2; all four members did the singing while Todd and Tsuji Nozomi did the raps; Inaba is also on this version as a backing vocalist.
- Single: "BE ALL RIGHT!"
- Notes: Minimoni released a version of this single for Minimoni Songs 2. Mika Todd and Ayaka performed the song together at Todd's final Hello! Project performance.
2004 Shuffle UnitEdit
For 2004, there were no separate shuffle units. Instead, all 46 members of Hello! Project joined to form H.P. All Stars. There was only one single released this year as well, "ALL FOR ONE & ONE FOR ALL!", which has since become another theme for Hello! Project. This is the first year in which there are two B-sides: "Sankaku Kankei", sung by Inaba Atsuko, Ohtani Masae, Shibata Ayumi, and Matsuura Aya, and "Suki ni Nacchaikenai Hito", sung by Tanaka Reina, Murakami Megumi, Suzuki Airi.
- Single: "ALL FOR ONE & ONE FOR ALL!"
- Note: In the MV, everyone wore school uniforms unique to their group.
2005 Shuffle UnitsEdit
The last group of shuffle units and the first group that does not feature all members of Hello! Project.
- Iida Kaori is the only Hello! Project member to have been involved in all Shuffle Units as a member of Aoiro 7, 10nin Matsuri, Odoru♡11, 11WATER, H.P. All Stars, and Puripuri Pink.