The Matsui-gumi is a Yakuza syndicate based in Washington, FDC.
The Matusi is a Yakuza clan that would get into turf wars in the 2050s with either the Mafia or with one of its Yakuza rivals (Chong-Pak-Pa, Fudo-rengo, and Sessho-gumi) in the UCAS capital. It made sure to keep the violence mostly restricted to those in the criminal underworld.[1]