Toukijin is a possessed sword forged fron Goshinki's Fang at the request of Sesshomaru. It was forged by Kijin-bo, an old apprentice of Totosai. The sword bore the hatred of Goshinki, and it possessed Kijin-bo to kill Jaken, and then go after Inuyasha. It was a equal match for the new Tetsusaiga, which had become quite heavy. In the end, Kijinbo was killed by the power of the sword and Sesshomaru, having revived Jaken with Tenseiga, claimed Toukijin for himself.