The Port Mafia is a fictional organization from the light novel series Bungo Stray Dogs, created by Kafka Asagiri. It operates in the city of Yokohama and is known for its involvement in various criminal activities, including smuggling and assassination. The group is composed of individuals with supernatural abilities, which they use to maintain power and control over the city's underworld. Key members of the Port Mafia include Osamu Dazai, a former member of the organization with the ability to nullify others' powers, and Chuuya Nakahara, who possesses the ability to manipulate gravity. The Port Mafia often clashes with the Armed Detective Agency, a group that seeks to uphold justice and combat the Mafia's influence.