1) Kafu - Dj active in the Czech city Brno, DnB. Played mainly in underground clubs. Began in 2006. He is'nt much known, but it has its fans. 2) KAFU (可不, 音楽的同位体 可不) is a Japanese Song Voice developed by KAMITSUBAKI STUDIO in collaboration with the virtual singer KAF, and was released for CeVIO AI in July 2021.[1][2] She is part of the Musical Isotope Series.