As you come out of the Forest of InuYasha you will find a grassy clearing where on the side of a hill is a cave. Everyday before Naraku came to be the preistess Kikyou came and cared for a wounded bandit by the name of Onigumo. He had fallen in love with Kikyou but due to his injuries he was unable to move so he called the demons to come and feast on his flesh so that way he could have a body so he could have Kikyou but the demons took total control and things did not go as he planned. If you go in the cave you will see a burn print where Onigumo once layed before he became Naraku.