Inuyasha the Movie 4: Fire on the Mystic Island

In a distant past, Inuyasha bore a blood scar on his back, fueling his unrelenting quest for vengeance. His journey takes an unexpected turn when he meets fellow scarred children yearning to break free. One of the escapees whisks them away to a mysterious island, where they become trapped until they can defeat four formidable war gods, a daunting task that seems all but insurmountable.