Yakuza's Yamabishi-gumi symbol. The Sixth Yamaguchi-gumi (六代目山口組, Rokudaime Yamaguchi-gumi?) is Japan's largest yakuza organization. It is named after its founder Harukichi Yamaguchi. Its origins can be traced back to a loose labor union for dockworkers in Kobe before World War II.
08-2015: Shinobu Tsukasa, the boss of Japan’s largest “yakuza” gang, the Yamaguchi-gumi, gets into a car after arriving at the train station in Kobe. Japanese police are bracing for gang war as Yamaguchi-gumi mafia group splits.