There is definitely some truth to what Nitro says; there just isn't really much known about organized crime in California in general. We know about the gang landscape over there. There's the African American street gangs and prison gangs (Bloods, Crips, BGF...), Mexican prison gangs and street gangs (La Eme, Nuestra Familia...), prison gangs and outlaw motorcycle gangs for good ole boy white criminals (Aryan Brotherhood, Hells Angels...). There's some Triad gang activity in the Chinatowns. There has been a Yakuza presence in the Japanese communities, a Korean gang presence in the Korean communities and a Vietnamese gang presence in the Vietnamese communities. There's documented Israeli mob activity in LA as well as Chaldean mob activity in San Diego. Eastern European OC is mostly confined to Armenian gang activity in the Armenian communities of LA.

That's it basically. I don't any other Southeast Asian or Polynesian gang can make a claim for the "organized crime" title. And even then remains the question if you consider prison gang, outlaw motorcycle gang as well as smaller ethnic mob activity organized crime the same way and on the same level you consider the American Mafia on the East Coast to be organized crime.