Yakurōdokusen (薬老毒仙, Master of Potions, "Old medicine poison hermit") was a drunken sage who helped Sango repair her damaged Hiraikotsu. He dissolved Hiraikotsu into a jug and told Sango to go into a second jug and battle the demons inside, warning her that if she failed to defeat them then Hiraikotsu would be no more. Sango goes into the jug in order to battle the demons, who angrily demand to know why she sacrificed them; Sango quickly realizes that these demons are the same ones whose bones were used to create Hiraikotsu. After a short battle, the demons ultimately decide to rejoin Sango once again as Hiraikotsu; while having repaired Hiraikotsu, Yakurōdokusen's potions also made Hiraikotsu a much more powerful, it now had the ability to absorb and disperse poison, making it a very form