The Viper Brothers: The Blackmailers(1973)

Upon his release from prison, Masa (Bunta Sugawara) is disappointed to not be picked up by his brother Katsu (Tamio Kawaji). After hitching a ride on a bus full of old women, Masa finds out that Katsu tried to fake a car accident and get some money for Masa to live on after prison. Together, the two decide to blackmail the woman (Yoko Horikoshi) who hit Katsu, who happens to be the daughter of a rich company president (Seizaburo Kawazu). 6th film in a series of 8.