After defeating Shinomori Aoshi and Sōjirō, Kenshin faces Shishio himself. Shishio's sword, like Kenshin's, is a work by master swordsmith Arai Shakku: a blade called ; its self-sharpening serrated edge flaked away in a regular pattern as it was used and it had become soaked in the flesh and body fat of the victims he had killed over the years. As a result, he is able to execute fire-oriented techniques using the oils as fuel, which uses friction to ignite the human fats that have soaked into his sword over time. Shishio easily defeats the weakened Kenshin, but is confronted by his former allies: Sagara, Saito and Shinomori. With Kenshin recovering, the two continued their fight, during which Shishio's body started to overheat to dangerous levels. At one point, Yumi intervened, standing in the way of a blow from Kenshin. Taking advantage of his moment of vulnerability, Shishio runs his sword through Yumi in an attempt to hit Kenshin. Eventually, Shishio's body heat rises to the point where his blood evaporates and the fat and oils in his body ignited. The end result was Shishio combusting. He is later seen in Hell with Yumi and the suicidal Hōji, commenting that they try and take it over.