InuYasha the Movie 4: Fire on the Mystic Island

When the mythical island of Houraijima mysteriously reappears after fifty years, it brings with it a terrifying assault by the Shitoushin—four brutal war gods bent on exploiting the ancient power that sustains the sanctuary. Trapped in a desperate struggle to save the island's surviving half-demon children, Inuyasha and his loyal companions must join forces with the enigmatic Sesshoumaru. Together, these fierce rivals must confront their pasts and unleash their ultimate strength to defeat the divine tyrants before Houraijima is destroyed forever.