Yakuzou is a medicine man who travels the lands to wherever his talent and medicine are needed. His progress is stopped when a rockslide blocks the path to a town where they urgently need his expertise. He asks the player for a Putrid Gastric Juice so that he may cut his way through the rock, since it supposedly has the properties to cut through steel. Now that he has the Putrid Gastric Juice he will continue on his journey to heal the Youkai who need his medicine.