Sads was formed by Kiyoharu, vocalist of the disbanded Kuroyume, in May 1999 and at the same time formed his own record label "Full Face". Their first live tour was held in the United Kingdom. Kiyoharu has said that the decision to tour internationally from the very beginning was to test Sads' ability to "compete worldwide".
Their first album, Sad Blood Rock'n'Roll, was a continuation of the bare-bones punk and garage rock from the last Kuroyume album, Corkscrew. Sads eventually delved more into glam rock and post-punk territory as their releases progressed.
In early 2010, Kiyoharu announced that Sads and Kuroyume would be resuming activities again, though the other original members of Sads would not be returning; instead, the band now included K-A-Z, the guitarist of the band Detrox, Keisuke Kubota, support bassist for the band 30size, and Go, leader and drummer of the band Suns Owl. They released their first album since reforming, The 7 Deadly Sins, on July 7, 2010.
Their official fanclub was originally called "Rubbersole", but was renamed to "VIP" after reforming in 2010.
In Autumn 2013 sads is releasing two albums "The Celebrate" and "The Respect" also performing at Shibuya- AX on July 7th, 2013 titled "MAD JULY DOLLS".