Heir to Darkness (闇の後継者, Yami no Kōkeisha) is episode 148 of the Naruto: Shippūden anime.
After returning to Mount Katsurugi, Tonbee, Hotaru, and Team 7 planned their next move. Tonbee explained the clan's history and En no Gyōja's dream. Tonbee also said that if Shiranami comes back that the clan will be restored. Naruto Uzumaki went to search for him. Meanwhile the others were preparing to remove the kinjutsu. At the end of the episode, the group of hunter-nin tracking Utakata were in the process of pursuing him when they were confronted by the Animal Path's dog summon.