The Yamaguchi clan is the largest Yakuza organization in the Japanese Imperial State, and forms most of the bulk of the Watada-rengo alliance. It is the only Yakuza syndicate based in North America which is still a member of the Watada-rengo, all the others having defected to the Shotozumi-rengo.
Yamaguchi-rengo controls the Potomac Yard in DeeCee, from which they control much of the Potomac smuggling activity. Transporting millions of cargo up and down the east coast to both the CAS and UCAS.
See also Yamaguchi-gumi.