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Description
Onikura Mutsu-no-Kami, Governor of Mutsu province, initiates the central conflict by scheming to seize forested lands protected by the emperor's loyal officer, Iwaki. Spitefully denied hunting rights by Iwaki, Onikura deliberately ignites a forest fire on the emperor's protected lands. He then falsely accuses Iwaki of causing the destruction, resulting in Iwaki's wrongful exile to Kyoto for interrogation and trial.

Following Iwaki's removal, Onikura moves to claim the family estate. He specifically targets Iwaki's young daughter Anju, pressuring the family to agree to a marriage proposal by leveraging his authority. His predatory intentions are clear when he responds to the observation "However much you wish to marry her, she’s still a child" with "Of course! That’s what makes her so sweet," reinforcing his demand with the threat: "It would be better for you if you didn’t deny my proposal. I say this as your superior."

His physical presence reinforces his antagonism. During a hunting sequence, buffoonery and lack of skill contrast his capacity for cruelty. Visually, his character design, featuring broader, darker facial features, aligns with other villains, contrasting the protagonists' fair and delicate depictions.

After the family flees to escape his control, Onikura pursues them into the wilderness, forcing them deeper into hazardous territory where slave traders operate. Though not directly responsible for their subsequent capture and sale, his actions set this tragedy in motion. Animal companions aiding the family temporarily thwart him through comedic interventions, like causing him to tumble into a river, highlighting his vulnerability despite his societal power.

Onikura’s motivations stem from entitlement and greed, seeking to expand his influence through illegitimate acquisition. His exploitation of authority underscores the film’s exploration of feudal corruption. His false accusation exemplifies how individuals within an ostensibly just hierarchy can manipulate the system to persecute the innocent.

His legacy persists through the suffering inflicted on Iwaki’s family. The children’s enslavement under Sansho and their prolonged separation trace back to his arson and slander. While absent from the narrative's latter segments following the family’s dispersal, his actions create the conditions for their enduring hardships and quest for reunion.