Zi:Kill (stylized as ZI:KILL or ZI÷KILL) was a Japanese visual kei rock band active from 1987 to 1994. The core members were vocalist Tusk, bassist Seiichi and guitarist Ken. Zi:Kill achieved moderate success, with their three major label studio albums reaching the top ten on the Oricon chart. They were featured in a chapter of Karl Taro Greenfeld's novel Speed Tribes that documents the writer's time spent with the band and the events that nearly caused their break up.