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The Oni Tribe had existed since the dawn of Japan, born from humanity's deepest fears while embodying the wrath and unforgiving power of nature. Among all Yokai, Oni ranked among the strongest. At their pinnacle stood their greatest member and king: Shuten Doji, the Ancient Demon King who terrorized Japan's human population for centuries until an Ancient Hero, Minamoto no Yorimitsu—also known as Raikō—finally brought him down.
After their great king's death, the Oni faced relentless persecution and slaughter. Yet they endured, breeding within Corrupted Domains and clinging to life through the ages. Time and again they were hunted down by humans and gods alike, except for one tribe. Led by the descendants of Shuten Doji, the Red Oni Tribe survived deep within Mount Takao, hidden inside a vast Corrupted Domain born from their ancestor's own corpse.
