POSSIBILITY (ポッシビリティー) is a Japanese mixture rock band, with an upbeat sound that fuses rock, pop and rap. It was formed in 1999, in Fujisawa, Kanagawa Prefecture. The band consists of five members: 43K ("SHIMI K", left-microphone), EIG ("Eiji", right-microphone), KAZU-O (guitar), SHIMADA (bass) and HAYATO (drums). The band is best known for the single "Sanagi", which was the ninth ED of the anime Gintama. They have also collaborated with artists such as SBK and Dragon Ash, and have served as an opening act for the latter.