As in the manga, the old master Jiji is tasked by the Tokugawa shogunate to raise a band of assassins. Their task is to finish off Toyotomi Hideyoshi's three allies: Nagamasa Asano, Kiyomasa Kato and Masayuki Sanada, to prevent an outbreak of the new civil war.
Set in Japan during an unspecific year of the Edo period, Ogami Ittō, disgraced former executioner, or Kogi Kaishakunin, to the shogun, wanders the countryside, pushing a baby cart with his 3-year-old son Daigoro inside. A banner hangs off his back. "Ogami: Suiouryo technique" (Child and expertise for rent)(子を[son] 貸し[for hire] 腕 [arm|skill] 貸し[for hire] つかまつる [to serve] 水
The disgraced former executioner, or Kogi Kaishakunin to the shogun, Ogami Ittō is now living rough on the land with his three-year-old son Daigoro, travelling the countryside as a hired killer. Pushing his son in a baby cart, he stops at a bathhouse looking for a room and a bath, and is eagerly welcomed in by a young woman. However, the manager of the house sees Ittō as a dirty vagabond and scolds the young woman for letting him in the house. Overhearing this, Ittō goes to the baby cart and retrieves a bundle and hands it to the manager for safe keeping – it is 500 gold pieces, earned from a recent job. The manager's tone quickly changes, but when he tries to wash Daigoro's feet, the boy kicks water at the old man and tromps across the floor, leaving wet footprints.
Ogami Ittō, the disgraced former shogun's executioner, or Kogi Kaishakunin, is traveling by river on a boat with his young son Daigoro floating behind in the baby cart. A young woman at the front of the boat, clearly distraught for some reason, accidentally drops a bundle into the water, which Daigoro retrieves. Ittō, draws his sword partway and notices in the reflection on the blade that some bamboo reeds are trailing the boat. Ittō is being followed by operatives of his mortal enemy, the Yagyū Clan – a constant threat that he can never ignore. Later, as Daigorou is relieving himself in a bamboo glade, Ittō slices some bamboo stalks, causing some ninja to fall from their perch.
Oyuki, a tattooed female assassin – the renegade member of a daimyo's personal bodyguard detail – is killing every man that is sent up against her. Along with her deadly use of the short blade, she strips to the waist while fighting to reveal elaborate tattoos on her chest and back. On her front is a kintarō grasping her left breast. A portrait of a mountain witch covers her back. She then cuts off her victims' topknots, or chonmage, which brings dishonor to the dead man and his family.
Ogami is tested by five messengers, each who try to kill him. After defeating all the messengers, Ogami learns he must kill a young girl who was raised as a boy and is intended to be the heir of a local daimyo, while the real heir, a little boy, is kept locked away. In addition to murdering the senile, old lord, his concubine and the girl, Ogami must stop a document revealing the deception from reaching the hands of his mortal enemy, Yagyū Retsudō. Meanwhile, Ogami Daigoro is again separated from his father and proves his courage and sense of honor as he refuses to admit the guilt of a woman pickpocket he became mixed up with.
The swordsman Ogami Ittō is confronted by a secretive branch of the Yagyū clan that practices black magic, including the ability to burrow through the earth. He encounters Kaori, a female expert with knives. And there's Hyouei, an illegitimate son of Yagyū Retsudo who kills anyone Ittō and Daigoro come into contact with. It culminates in a final battle between Ittō and the combined clan groups under Retsudo on a snow-capped mountain in northern Japan, in which the baby cart becomes a sled. Ittō defeats the entire army, shooting, stabbing, slashing, dismembering, and beheading the entire army. But the one-eyed Retsudo again gets away, vowing to kill Ittō another time.
As the opening credits roll, an abbreviated version of Ogami Ittō's (Tomisaburô Wakayama) past as Shogunate Decapitator and his wife's murder by ninja are seen, with Daigorō (Akihiro Tomikawa) providing the narration.
Une force spéciale de la police impériale constituée de samouraïs est mise sur pied pour lutter contre le crime. Son ennemi n° 1 : Nizaemon Kumokiri, un bandit de grand chemin dont personne ne connaît la véritable identité, qui multiplie les cambriolages audacieux dans les demeures des riches commerçants.
Yamamoto Kansuke (Toshiro Mifune) is a general of warlord Takeda Shingen (Yorozuya Kinnosuke), whose titular red banners are his trademark. Yamamoto has a ruthless but effective approach to battle and politics, and advises Takeda Shingen on almost everything he does, including the assassination of Suwa Yorishige (Akihiko Hirata). Of Lord Suwa's household, Princess Yu (Yoshiko Sakuma) refuses to commit suicide, and the film comes to center on a love triangle between the lord, his general, and the princess.
Robert Sand, agent of D.R.A.G.O.N. (Defense Reserve Agency Guardian Of Nations), is playing tennis on his vacation with a beautiful black girl, when his commanding officers ask him to save a Chinese girl named Toki who happens to be Sand's girlfriend, and the daughter of a top Eastern Ambassador. The ransom for the abduction was the secret for a terrific new weapon - the freeze bomb - but the 'Warlock' behind the deed is also into the business of drug dealing and Voodoo ritual murders. The search takes him from Hong Kong to California through Miami, and plenty of action, against bad men, bad girls, and bad animals.
A young woman on a train eyes a nervous man. In a flash, he is chased down the train and the young woman slices him in half. She is Saya (Jun Ji-hyun), a four-hundred-year-old skilled half human-half vampire samurai who hunts vampires. Raised by a man named Kato (Yasuaki Kurata), she works loosely with an organisation known as "The Council", a secret society that has been hunting vampires for centuries. Saya's motivation goes beyond duty; she wants revenge; Onigen (Koyuki), the oldest of the vampires, murdered her father. For her next mission, she goes undercover as a student at Kanto High School on an American air base near Tokyo, Japan.