A yakuza leader must balance his violent tactics necessary for the rough streets of 1960s Tokyo with the domestic needs of his daughters.

A salaryman living alone in a small apartment is visited by complete strangers, a large family with grown-up sons and a daughter, who take over his apartment and his life. They use his money and he has to wait on them as their servant. They even steal his girlfriend. Although they behave very dictatorially, everything is decided "democratically" by the majority.

Rumors are circulating that the shogunate is losing control of some feudal domains. Lord Yagyu Munefuyu is assigned to deal with the problem and the rebellious clans will be crushed! Meanwhile, a former vassal of the Kazama clan is shot and killed. Moments later a second man is killed by a mysterious master swordsman. Matsudaira Choshichiro and his companions arrive at the crime scene and find a new type of repeating gun. The carved seal on the gun stock belong to the Saiga; a ninja clan abolished by the shogunate many years ago. The blame for the murders is placed on the Kazama clan. Are they guilty or is this a wise cunning plan by Lord Yagyu to be able to destroy the Kazama clan? Choshichiro sets out to reveal the truth and try to save the doomed Kazama clan! In his way are the Owari, Lord Yagyu and his ninja assassins, and the mysterious master swordsman! Will Choshichiro prevail against impossible odds...?

Based on the International Military Tribunal for the Far East of 1946–48, depicts Japanese prime minister Hideki Tojo as a family man who fought to defend Japan and Asia from western colonialism but was ultimately hanged by a vengeful United States.