200 years ago, a clan of moth yōkai from the Asian continent, led by their lord Hyōga, followed in the wake of the Mongol army during its invasion of Japan, in order to capture the souls of those slain in battle. However, they were defeated by the ruler of the western lands, the great dog daiyōkai Inu no Taishō, who sealed Hyōga and his son Menōmaru within the Tree of Ages. However 200 years later, Menōmaru would escape and seek to reclaim his father's powers and conquer the world, and nearly succeeded, but was narrowly defeated by the son of the Inu no Taishō, the hanyō Inuyasha.