A sadistic Daimyo (feudal lord) rapes a woman and murders both her and her husband, but even when one of his own vassals commits suicide to bring attention to the crime, the matter is quickly hushed up. Not only will there be no punishment, but because the Daimyo is the Shogun's younger brother, he will soon be appointed to a high political position from which he could wreak even more havoc. Convinced that the fate of the Shogunate hangs in the balance, a plot is hatched to assassinate the Daimyo. The two most brilliant strategic minds of their generation find themselves pitted against each other; one is tasked to defend a man he despises, and has a small army at his disposal. The other is given a suicide mission, and has 12 brave men. They are the 13 Assassins.

After a salary-man's fiancée attempts suicide, he recounts his gruesome family history which saw generations of his ancestors suffer and sacrifice themselves for the sake of their cruel lords.

Ryujin Misaki, located at the edge of the Genkai Sea, is known as an isolation ward for leprosy patients. When Saotome, a sword master and guard of the Shogun, hears news of a doctor gone missing, he begins to suspect that things are not what they seem at Ryujin Misaki. Intent on discovering the truth, Saotome launches a private investigation.

This remake of Satomi Hakkenden is the most requested of all Toei movies and features some of the greatest special effects ever filmed. Set in the mountains of Awa Province, a monster bat from the heavens, a monster eagle from the clouds, a killer amphibian man, and a fire-breathing monster serpent! Mean-while being protected by the black magic of two sorceresses, the army of Ogigayatsu Sadamasa surges on! Young Satomi Yoshimichi stands up to the onslaught in defense of peace and happiness. As incarnates of the loyal family canine Yatsufusa, eight young warriors are bound by eight mystical beads of virtue. These are the adventures of eight warrior brothers, Satomi Hakkenden!