The Nishioka Family and Its Heike Heritage
The museum was established in the former residence of the Nishioka family, whose ancestry is traced to a man named Horikawa Naiki. According to local tradition, he served as a court physician to Emperor Antoku during the period when the Heike clan held power in the capital.
Following the Heike defeat at the Battle of Dan-no-ura in 1185, Horikawa Naiki is said to have fled to the remote Iya region with other survivors. There, he settled and continued to serve the local community as a physician and Shinto priest. His descendants preserved the family’s traditions, and the family eventually adopted the surname Nishioka.
From Medieval Refugees to Local Leaders
The history associated with the Nishioka family reflects the turbulent relationship between the remote mountain communities of Iya and the political powers that governed the region. After Hachisuka Iemasa took control of Awa Province, corresponding broadly to present-day Tokushima Prefecture, local warriors in Iya are said to have participated in a rebellion known as the Iya Mountain Rebellion.
The Horikawa family reportedly became involved in the conflict and provided medical care during the unrest. After the rebellion was suppressed, the family was pardoned and later assumed the role of local village leaders, adopting the name Nishioka. Their story connects the museum not only to the Heike legends but also to the wider history of settlement and community life in the Iya mountains.
Historical Artifacts and Religious Traditions
The Nishioka family’s heritage includes objects associated with Horikawa Naiki and the region’s history. Among the items traditionally linked to him are an unnamed sword measuring approximately 4 shaku and 2 sun—about 127 centimeters—along with a gold-colored ritual offering and a sacred mirror. These objects were reportedly dedicated to local shrines and are valued as historical records of the turbulent period in which the family lived.
Such artifacts help illustrate the close connections between medicine, religious service, and community leadership in traditional Japanese mountain settlements. They also offer a perspective on how family histories and local legends have helped preserve the identity of the Iya region.
A Family Tradition of Medicine
The Nishioka family is also remembered for its long association with medical practice. According to family history, descendants of Horikawa Naiki traveled down the Iya River and established the Horikawa Clinic in Kawasaki, in the Ikeda area. The family continued practicing medicine for generations into the Showa era (1926–1989).
The clinic later moved to Uena, across from JR Oboke Station in Yamashiro Town, and continued operating into the Heisei era (1989–2019). This legacy demonstrates the family’s enduring role in providing medical services to communities spread across the mountainous region.
Traditional Architecture and the Storehouse
The museum’s main house and earthen-walled storehouse were designated cultural properties by Miyoshi City in 2009. Together, they preserve elements of traditional residential architecture and provide a setting in which visitors can learn about the family’s past and the history of the Iya region.
The storehouse is particularly associated with the preservation and display of objects connected to everyday life, including household utensils, farming tools, and historical documents. These items offer insight into how people lived and worked in the mountain communities before modern transportation and infrastructure transformed the region.
Opening Hours and Access
Opening hours: 8:00 a.m.–6:00 p.m. from March through October, and 8:00 a.m.–5:00 p.m. from November through February.
Closed: Open year-round, with no regular closing days stated in the supplied information.
By public transportation: The museum is approximately 10 minutes by bus from JR Oboke Station on the Dosan Line. Check bus schedules in advance, as services in the mountainous Iya region are limited.
By car: The museum is approximately 50 minutes by car from Ikawa-Ikeda Interchange on the Tokushima Expressway. Driving is a convenient option for visitors planning to explore several attractions in the area.
Explore the Iya Valley and Its Famous Vine Bridge
The museum makes a worthwhile addition to a sightseeing trip through the Iya Valley, an area known for its dramatic V-shaped gorges, emerald-green river waters, and secluded mountain villages. The surrounding landscape is especially beautiful in autumn, when the hillsides turn shades of red, orange, and gold.
Another nearby highlight is the Iya Kazurabashi Vine Bridge, a traditional suspension bridge associated with the legends of Heike refugees. Constructed using plant vines, the bridge offers an atmospheric and adventurous way to experience the region’s mountain scenery.
A Window into Iya’s Past
The Heike Yashiki Folk Museum brings together family history, traditional architecture, and the legends that have shaped the cultural identity of the Iya Valley. Through the story of Horikawa Naiki and the Nishioka family, visitors can explore how memories of Japan’s medieval conflicts became woven into the history of a remote mountain community.
Combined with the Iya Valley’s spectacular scenery and the nearby vine bridge, a visit to the museum offers a deeper understanding of the region beyond its natural attractions. It is a rewarding stop for travelers who want to discover the history, traditions, and enduring stories of Tokushima’s mountain country.