is a Japanese novel series by Tetsu Yano released by Kadokawa Shoten from 1984 to 1985.
The series was adapted in 1985 into an anime film directed by Rintaro and animated by Madhouse. The screenplay was adapted by Mori Masaki, and character designs were created by Moribi Murano, who also illustrated the novel series. Takuo Noda directed the animation, and the music was composed by Ryà «dà  Uzaki and Eitetsu Hayashi.
The story begins during the Bakumatsu period of Japan in the last years of the Tokugawa Shogunate. It continues through the pre-Meiji period and refers to historical events such as the Boshin War, including the involvement of foreign governments, the Naval Battle of Hakodate, and the Meiji Restoration. There are also references to historical figures such as Captain Kidd, Saigà  Takamori, Andà  Shà Âzan, Oguri Kozukenosuke (Tadamasa), Geronimo, and Mark Twain.
Jirà Â, a young boy of Japanese and Ainu descent, is a foundling raised by a kindly innkeeper and her daughter in the village of Sai on the Shimokita Peninsula.
One evening, a shinobi kills Jirà Â's adoptive mother and sister while he is away. When he returns home, he finds their bodies and a strange dagger. The angry villagers accuse him of the murders, and rather than face a brutal crucifixion for the grave crime of parricide, Jirà  escapes with the dagger. He encounters a Buddhist monk called Tenkai, who works for the Shogunate as an Oniwaban (Secret Police). Tenkai takes the boy to confront the man who supposedly killed his family and provokes him into delivering the killing blow. To cover his tracks, Tenkai has the village set ablaze, and the villagers are slaughtered. Tenkai takes Jirà  to his temple on the island of Ezo, and has his subordinates Shingo and Sanpei train him in the ways of the Ninja. Years later, Jirà  leaves to find answers to the mystery of his family and his father, Tarà Âza. Meanwhile, Tenkai has him followed.
Jirà  comes across a group of Japanese men beating up an old Ainu man, and he quickly dispatches them. The old man dies of his injuries, but his son Uraka takes Jirà  to his home village of Shinopirika-Kotan, unaware the old man's assailants are agents of Tenkai. At Kotan, the village elder recognizes Jirà Â's dagger as the Dagger of Kamui, which was originally owned by a former village chieftain. It was given to a Japanese ninja who married the chieftain's daughter, Oyaruru. Years later, Oyaruru returned to Kotan alone, but eventually left the village to live upriver by herself.
Jirà  finds Oyaruru and learns she is his biological mother. She reveals that Tenkai dispatched Tarà Âza to the mountain Kamui Nupuri to find a rumored treasure large enough to keep the Shogunate in power. However, Tarà Âza broke all contact with Tenkai and married Oyaruru. When Tenkai caught up with them, he slashed the face of the infant Jirà  and sent him floating downriver in their canoe. Tarà Âza fought Tenkai's men on the cliff above, but lost an eye to a primitive grenade and his sword arm to Hanzou, then appeared to fall to his death. Jirà  comes to the horrifying realization that Tenkai had tricked him, and that the man he stabbed was his father. During their evening meal, Jirà  and Oyaruru collapse from a paralysis potion supplied by Shingo, and Oyaruru is killed by Shingo with the Dagger of Kamui. Implicated in her murder, Jirà  is imprisoned, but Uraka returns to help free him. Jirà  finally realizes that Tenkai has been manipulating him for years into following his father's footsteps, searching for the treasure, and plans his revenge against Tenkai.
Traveling north, Jirà  is befriended by the elderly Andà  Shà Âzan and a young Ainu girl. She helps find secret instructions to find a great treasure which is hidden with the hilt of the sword of Kamui. However, Jirà  is tracked down by three of Tenkai's formidable assassins, whom he defeats, but not before they kill Shouzan. The Ainu girl helps Jirà  escape, but she kills herself when confronted by the following Tenkai. With the aid of the sailor Sam, Jirà  books passage on Captain Drasnic's ship to the United States. Onboard, he is attacked by Oyuki, one of Tenkai's shinobi, but he defeats her. He then saves her from drowning, and they develop a strong bond. After arriving in America, Jirà Â, Sam, and Oyuki become separated, and Jirà  travels on alone. Jirà  befriends Chico, a French-born Indian woman, and shelters with her tribe. He then encounters Mark Twain on the way the Los Angeles, heading for the island of Santa Catalina, which is apparently the location of Captain Kidd's treasure.
Jirà  eventually finds a small treasure on the island, but Tenkai and his shinobi have followed him there with Oyuki. Tenkai suddenly reveals that Sanpei is a Satsuma and an associate of Tarà Âza, who was also Oyuki's father, making her Jirà Â's half sister. Oyuki angrily stabs Tenkai through the heart with the dagger, although he manages to fatally wound her before he dies. Jirà  then finds the real treasure below in a hidden cavern. Later, Chico reappears and shows Jirà  a similar copy of the treasure's location. She reveals her real name is Julie Rochelle, the daughter of French spies also seeking the treasure, and that her father and Tenkai killed each other. Jirà  now realizes that Tenkai has been using body doubles. He returns to Japan, where he uses Captain Kidd's treasure to help fund the overthrow of the Tokugawa shogunate by the combined Satsuma-Choushuu forces.
In 1869, at the Citadel of Hakodate, the Imperial Japanese Navy and Army closed in on the last remaining Shogunate rebels. After a massive naval bombardment, Jirà  wanders through the rubble and bodies, eventually encountering Tenkai. They engage in battle, during which Jirà  kills Tenkai by impaling him through his cranium with the dagger. Jirà  leaves Hakodate as the Imperial forces capture the city, but not before paying a silent farewell to Sanpei and his master, the samurai Saigà  Takamori.
The Kadokawa bunkoban releases are as follows:
The Haruki bunkoban release is as follows:
A video game was released for the NEC PC-88 in 1985.
On October 2, 1987, an American home video company known as Celebrity Home Entertainment released The Dagger of Kamui on their Just for Kids VHS label in an English-dubbed version called Revenge of the Ninja Warrior. This release of the film was heavily edited, removing 22 of the 132 minutes of footage; the resulting cut ran 110 minutes. The uncut dub was later re-released by Best Film and Video Co. in 1995 under the title The Blade of Kamui.
The unedited version, in Japanese with English subtitles and bearing the title The Dagger of Kamui, was later released on VHS and DVD by AnimEigo.
Ryudo Uzaki's score for the film is notable for combining rock music instrumentation with Balinese kecak vocals.
Helen McCarthy in 500 Essential Anime Movies states that "with Madhouse and a stellar team of animators on board, the art and design are first class". She praises the "clever script", fluid animation and battle scenes, calling the film "a good old-fashioned epic".