Purojekuto Shaffuru Yunitto) was a Japanese idol project group formed by Up-Front Promotion in 2000 and associated with Hello!
Project acts, where members were recombined into three different groups to release a single for each.
After a four-year hiatus, the project was briefly revived in 2009, where several old sub-groups saw a return under new names and new members.
Tsunku resumed the Shuffle Unit project in 2005, with groups rearranged under the theme "elegance."
[8] On July 15, 2009, Tsunku revived the Shuffle Unit project with a cover album titled Champloo: Happy Marriage Song Cover Shū, describing it as J-pop with the intention of it being played during summer parties and weddings.
[1] He named the concept of the Shuffle Units "champloo" to describe the "chaotic" member line-up.