Genya Shinazugawa can eat demons because he has an incredible jaw strength and special digestive organs that allow him to tear off and consume demon flesh without turning into a demon himself. This rare ability lets him temporarily gain the powers of the demon he has eaten, such as enhanced physical traits. His unique digestive system is considered his special trait, one of the five fundamental senses among the main demon slayers, corresponding to "taste," which complements others like smell, sight, hearing, and touch. This ability also requires the approval of Muzan Kibutsuji, the progenitor of demons, to function safely without turning Genya into a demon. His rare bloodline, being related to Sanemi Shinazugawa who has rare blood capable of affecting powerful demons, also contributes to this ability.
