Biography
Color bottle is a Japanese rock band formed in 2004. The band consists of 4 members:
竹森マサユキ (Masayuki Takemori) - vocals
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渡辺アキラ(Akira Watanabe) - guitar
穐元タイチ(Taichi Akimoto) - bass
大川“Z”純司(Junji Okawa) - drums
They sing the song "青い花" (Aoi hana) which is the opening theme for the anime Casshern Sins.
Biography text from Last.fm, available under CC BY-SA.