I ask out of simple curiosity, what is your view of gangsters (i.e. the networked organised crime variety, that is)? Are they the same wherever you go or does it depend on the country?
As a side note, the jury's still out on whether Yakuza are... 'worth it' or not. They participate in all manner of illegal activities, including prostitution, drug-trafficking, extortion etc. etc. but the Rokudaime Yamaguchi-gumi were notable for commencing aid operations a lot faster and a lot more efficiently than the Japanese government after the 1995 Kobe earthquake. And the irony is that with such a massive presence in Kobe, that city has the lowest incidence of violent crime in Japan...