Yakuza, Japan's mafia, has a long history with games: card games, Pachinko machines, and now social gaming. Some of Japan's current social games, including one about Yakuza, are funded by Japan's mafia, according to Tokyo Vice author and ex-Yomiuri Shinbun reporter Jake Adelstein.
I'm assuming these games aren't from major players in the social games scene that will easily turn up through a Google search. Adelstein makes a keen observation, pointing out that even Nintendo once had ties to Yakuza in the '60s, back when they owned a love hotel and distributed card games.
You'd be surprised by what the mafia throws money at. I met a guy once that told me CrimeCraft was funded partially by the Russian mafia, and even heard from professors that Russian mafia give considerable donations to universities' Russian programs. So, you never know with these things. I just hope no one is getting their ear lobbed off because my mom is playing Bubble Safari on Facebook.