The Port Mafia is an underground, criminal organization run by Ogai Mori and based in Yokohama, Japan. they have a business license that allows them to conduct their business in a lawful manner. The Port Mafia is also known as Yokohama's Guardians of the Night. The mafia owns dozens of businesses under its control. Mafia members also rise in politics and economics.Those who challenged them deeply regretted what they had done.and are considered the main trading company of the underworld