A Yakuza Goes Home (1970)

Original title: 極道釜ヶ崎に帰る

Shimamura & Mineko return to Kamagasaki in Osaka. In their return Shimamura quickly finds himself defending a lady in distress. During the skirmish he bumps into his old buddies who turns him on to the "new" goings on in town, Shimamura is angered to discover a Chinese triad organization has overthrown their gang, a situation they must reverse. Now he and the old gang finds themselves putting their lives on the line defending the honor of the "Yakuza Way", the locals of Osaka, even Japan!!