The Cannibal that Walked Free (also known as Cannibal Superstar ) is a British documentary produced by Visual Voodoo for Channel Five which explores - through direct access - the bizarre psychology and twisted celebrity fame that surrounds Japanese cannibal Issei Sagawa. The Cannibal that Walked Free (also known as Cannibal Superstar ) is a British documentary produced by Visual Voodoo for Channel Five which explores - through direct access - the bizarre psychology and twisted celebrity fame that surrounds Japanese cannibal Issei Sagawa. The Cannibal that Walked Free (also known as Cannibal Superstar ) is a British documentary produced by Visual Voodoo for Channel Five which explores - through direct access - the bizarre psychology and twisted celebrity fame that surrounds Japanese cannibal Issei Sagawa. The Cannibal that Walked Free (also known as Cannibal Superstar ) is a British documentary produced by Visual Voodoo for Channel Five which explores - through direct access - the bizarre psychology and twisted celebrity fame that surrounds Japanese cannibal Issei Sagawa.