Kazuyuki Kishino (岸野 一之, Kishino Kazuyuki, born September 13, 1961 in Tokyo), known by his stage name KK Null, is a Japanese experimental multi-instrumentalist active since the early 80s. He began as a guitarist, but soon added composer, singer, electronic musician and drummer to his list of talents, and also studied Butoh dance at Min Tanaka's workshop.Null joined the noise/progressive rock band YBO2 in 1984, issuing several albums and EPs throughout the remainder of the decade.