Ruins is an experimental musical project formed in 2015 by two Japanese musicians, Yoshida Tatsuya and Sasaki Hisashi. The duo blends various genres, including progressive rock, jazz, and avant-garde music, creating a unique and unconventional sound. Their performances are characterized by complex rhythms and unconventional song structures that challenge traditional musical standards. Ruins has released several albums, both as a duo and with other musicians, and has gained a cult following among fans of experimental music.