KK Null (born Kazuyuki Kishino, 1961 in Tokyo) is an experimental multi-instrumentalist. He began as a guitarist, but soon added composer, singer, electronic, drummer, and Butoh dancing.
Null joined the noise/progressive rock band Ybo2 in 1984, issuing several albums and EPs throughout the remainder of the decade. From there, Null produced albums for other artists, created his own record label (Nux Organization), and played with others: with the self-described "progressive hardcore trio" Zeni Geva, John Zorn, Yona-Kit, Steve Albini, Boredoms, Seiichi Yamamoto, Jim O'Rourke, Merzbow, Fred Frith, James Plotkin, Keiji Haino, Otomo Yoshihide, Jon Rose, Atau Tanaka, Zbigniew Karkowski, and Philip Samartzis, as well as supporting such artists as Sonic Youth and Mike Patton on tour. Null has released more than 60 albums, and he launched a new ensemble, Monster DVD, in 2001.