The Source Stories (Rashomon) Rashomon
Kurosawa's Rashomon draws on two short stories by Ryunosuke Akutagawa: "In a Grove" (1922), which provides the contradictory testimonies about the murder, and "Rashomon" (1915), which provides the ruined gate and the atmosphere of moral collapse. Understanding what Kurosawa kept, what he changed, and what he invented reveals the specific arguments he built on top of Akutagawa's foundation.
"In a Grove" provides the testimonies and the irresolvable mystery
Akutagawa's "In a Grove," published in the literary periodical Shincho in 1922, is a six-page story that presents multiple accounts of the murder of a samurai in a bamboo grove. The story contains testimonies from a woodcutter, a Buddhist priest, a policeman, an old woman (the wife's mother), the bandit Tajomaru, the wife Masago, and the dead samurai speaking through a medium. Each account contradicts the others. The story ends without resolution -- no narrator is identified as truthful, no synthesis of the accounts is offered. (wikipedia, tokyoweekender)
Kurosawa retained the central structure -- bandit, wife, samurai, and woodcutter each telling irreconcilable versions of the same crime -- and the refusal to resolve the contradictions. The courtyard setting, the direct-address testimony, and most of the specific plot details (the lure into the forest, the assault, the duel, the wife's dagger) come from "In a Grove."
"Rashomon" provides the gate, the rain, and the atmosphere of moral decay
Akutagawa's "Rashomon" (1915) is a shorter, darker story set at the same gate. In it, a recently discharged servant shelters from the rain at the half-collapsed Rashomon gate, which has become a dumping ground for unclaimed corpses. He encounters an old woman pulling hair from the dead bodies to make wigs. When he confronts her, she justifies the act as survival. The servant, persuaded by her logic, robs her of the clothes she has gathered and disappears into the night.
The story's argument is nihilistic: moral principles dissolve when survival is at stake. Kurosawa kept the gate, the rain, the atmosphere of decay, and the theme of moral compromise under extreme conditions. He discarded the specific characters and plot. (wikipedia)
Kurosawa's most significant invention was the baby
The abandoned baby at the Rashomon gate -- the element that provides the film's only unambiguous moral gesture -- does not exist in either Akutagawa story. The woodcutter's decision to adopt the child, the priest's restored faith, and the clearing skies are all Kurosawa's additions.
This is the adaptation's decisive move. Akutagawa's stories end in nihilism: everyone lies, everyone acts in self-interest, and the truth is permanently inaccessible. Kurosawa's ending does not dispute these conclusions -- the woodcutter is still a thief, the testimonies are still lies -- but adds a coda: compassion is possible even when truth is not.
Kurosawa "redirected Akutagawa's nihilistic conclusion and theme toward a humanistic affirmation of the possibilities of life and the condition of man." — Tokyo Weekender
Kurosawa elevated the woodcutter and the priest to structural protagonists
In "In a Grove," the woodcutter and the priest are minor witnesses who give brief testimony. Kurosawa transformed them into the film's structural protagonists -- the characters through whom the audience experiences all four testimonies. The woodcutter becomes the frame story's central figure: the man who found the body, testified at trial, lied about what he saw, and ultimately adopted the baby. The priest becomes the moral barometer whose faith erodes through each testimony and is restored by the woodcutter's final act. (tokyoweekender)
The commoner is Kurosawa's invention
The cynical commoner who shelters at the gate and draws the story out of the woodcutter and the priest does not appear in either Akutagawa story. Kurosawa created him as the audience's surrogate and the film's philosophical provocateur. The commoner's function is to strip away every comforting illusion: he dismisses the wife's tears, questions the woodcutter's honesty, and strips the baby of its clothes. His position -- that everyone is selfish and dishonest, and that accepting this is more honest than pretending otherwise -- is the argument the film must answer with the woodcutter's final act of compassion.
The woodcutter's confession to theft is Kurosawa's addition
In "In a Grove," the woodcutter gives brief testimony and disappears from the story. Kurosawa added the revelation that the woodcutter stole the pearl-inlaid dagger from the crime scene and lied to the court to conceal it. This addition transforms the woodcutter from a reliable outside observer into another compromised witness, completing the film's argument that no testimony is free from self-interest. It also makes his final act -- adopting the baby -- more complex: the man who performs the film's only unambiguous good deed is the same man who committed theft and perjury.
Akutagawa died at thirty-five; Kurosawa was making his stories live at forty
Ryunosuke Akutagawa (1892-1927) killed himself at thirty-five, leaving behind a body of short fiction that made him one of Japan's most celebrated writers. His stories are marked by psychological precision, moral ambiguity, and a bleakness that Kurosawa's adaptation partly counters. The Akutagawa Prize, Japan's most prestigious literary award for emerging writers, is named in his honor.
Kurosawa's adaptation of Akutagawa's stories is one of the most successful literary-to-film translations in cinema history -- not because it is faithful to the source material, but because it understands which elements to keep (the irresolvable testimonies, the atmosphere of moral decay) and which to transform (the nihilistic ending, the minor status of the frame-story characters). The film is not Akutagawa illustrated; it is Kurosawa arguing with Akutagawa.