Kessoku Band (stylized in lowercase as 'kessoku band') is the official anglicized name of 結束バンド Kessoku Band (Japanese: 結束バンド) is a fictional band and the primary of the anime and manga series, Bocchi the Rock! Their original songs are written by famous japanese musicians such as Ikkyu Nakajima (tricot) and Maguro Taniguchi (KANA-BOON), while Ritsuo Mitsui (LOST IN TIME, Stereo Fabrication of Youth, la la larks) is in charge of most of their arrangements.