Capone's Younger Brother: Heart and Speculation (1971)

Lesser, but still modestly entertaining sequel. Wakayama is wonderfully bastardly here, but has to do without Chicago bros. Yamashiro & Watanabe and the film is just that much less fun. It's also a little bogged down by an out-of-place environmental message. In return one does get Willie Dorsey (who would go on to lose his balls in The Street Fighter) in a rather big role as Capone's right hand man. There's a legion of other gaijin as well, Osman Yusuf among them of course. The rating could be a notch higher on a good day.