Movie 3: The Swords of An Honorable Ruler
Aside from the two swords Tetsaiga and Tensaiga, Inuyasha’s father had a third sword, Souunga. A tremendously powerful cursed sword, it was sealed in its scabbard and passed down as a Higurashi Shire treasure for 500 years. The sword breaks free of its scabbard in the modern day, but Inuyasha takes hold of it and is possessed. He takes it back through the well where he gets free, but the sword resurrects a long gone family enemy – Takemaru, the reason for the death of his parents.