The Irako Clan Ancestor was the founder and creator of the Irako Clan. During his battle with the Nine-Tails, Kurama, he managed to bite off one of it's tails, consuming some of Kurama's blood in the process. He later gained great power and nearly defeated Kurama until the demon fox disappeared. His offspring from then on would contain some of the fox's own chakra, although it becomes more diluted as more generations are created. His body is now encased in stone