This museum is housed in the former residence of the descendants of Horikawa Naiki, the court physician of Emperor Antoku. After the fall of the Heike clan, Horikawa Naiki and his family sought refuge in the Iya Valley, where they served both as physicians and Shinto priests, making use of the area’s abundant medicinal herbs.
In the garden stands an ancient tree estimated to be 800 years old. Inside the preserved Edo-period residence, visitors can view a collection of artifacts, including armor, banners, historical documents, and everyday tools once used by the Heike descendants.