I Don't Like Mondays is a four-piece Japanese pop-rock band formed in Omotesantdo, Tokyo, in 2012. The members are Masato (Vocals), Y.K.C (Guitar), Sugi (Guitar, Backing Vocals), RxYxO (Bass, Backing Vocals), and Katsuma (Drums). The group's debut album Play came out in 2014, introducing an accessible brand of pop-rock that quickly won the band a large following of teenage fans. In common with many successful Japanese performers, I Don't Like Mondays also began looking for commercial opportunities outside of music, including the development of personal clothing brands. The group's first fashion brand was a collection called "IDLMs By I Don't Like Mondays," which was followed in 2016 by another clothing line, Restir Edition, as well as the appropriately titled album Fashion. A pair of EPs -- 2017's Summer and 2018's A Girl in the City -- preceded the band's third album, Future, which appeared in 2019. Two years later, the group released Black Humor, which reached number 37 on the Oricon Albums chart. I Don't Like Mondays' fifth album, Runway, followed in 2023, debuting at number 47 in Japan. They released their sixth full-length album, FRIDAY, on September 25, 2026.
