The threat of violence. It is understood by the innate need to survive.

Gangland. That is what Trump is running. No respect for the rule of law simply because he can overpower it with violence, both domestic and international. He is a criminal through and through. It cannot be denied. He took control of the Oval Office and has been doing nothing but intimidating people everywhere for his own purpose. He would say it is a better world now. Wrong. 

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...But, they also appreciated the business she brought in, running girls and meth around Gifu. Unlike members of Italian mafias, who kick cuts of criminal profits  up through a rigid hierarchy, yakuza operate more like franchises, with members paying a monthly tribute to trade off the syndicate's threat of violence....