It exists two types of yakuza, clan- yakuza and freelance yakuza.
Freelancing yakuza is a yakuza that not commit any bigger crimes and belongs to a little group of hustlers.
They have however some difficulties to survive or not come into jail, because the clan- yakuza not allows anyone other to operate within their territories. Clan- yakuza can tip the police about crimes that the freelance yakuza haven´t commit.
If the freelance- yakuza earns to much money, the clan- yakuza kills the freelancing- yakuza or make him disappear without a trace.
Klan- yakuza can however have a certain use of a freelance yakuza. If the clan- yakuza shall do something that they not want the clan to be associate with, they can turn to a freelancing yakuza that, for a sum of money, does the job for them.
A freelance- yakuza can also be used as a scapegoat if it acquires a guilty to a crime.
If a freelancer is a truly genius he can manage to begin his own clan. Usual a freelance- yakuza becomes, if they not gets killed,a member in a clan.