In a desperate bid to save the world from eternal darkness, Inuyasha must put aside his animosity towards his brother Sesshoumaru and join forces to defeat the legendary sword So'unga, once wielded by their demonic father, and halt its destructive path to destroy all life on Earth.

InuYasha the Movie 3: Swords of an Honorable Ruler
The legendary sword So'unga, once wielded by the Great Dog Demon, poses a catastrophic threat to the Earth, threatening to plunge the planet into eternal darkness and destroy all life. To prevent this calamity, Inuyasha must put aside his differences and form an alliance with his estranged b...