The Scoundler vs. The Viper Brothers (1974)

A crossover between Wakayama's Gokudo and Sugawara Mamushi series. Gokudo runs a restaurant and makes Takuzo Kawatani his kitchen bitch. He tries to do the same for the Mamushi bros. but the boys don't play along, which pisses Gokudo off. Things get worse when he starts helping a young teacher and Bunta has a crush on a pretty girl... and unbeknownst to them it's the same woman! Yes, the film has not one but two romantic subplots! Of course it all ends in bloodshed.