Supercell is the name of more than one artist. 1. J-pop music group 2. the DJ Beat Fehlmann 3. A punk rock band 1. ????????? is a Japanese 11-member music group led by songwriter ryo. They initially formed in 2007 as a doujin music group with ryo as the sole member. They began their venture by making use of the ???? (Hatsune Miku) vocaloid singing synthesizer to produce vocals for songs submitted to the Nico Nico Douga video sharing website.