Imao Family Residence Yakushido: A Physician's Prayer Hall on the Nakasendo

Tucked within the historic Imao family compound in the former Shin-Kanou post town along the Nakasendo highway, the Yakushido (Medicine Buddha Hall) stands as a rare and deeply personal example of Japan's registered tangible cultural heritage. This small but significant Buddhist hall, dedicated to Yakushi Nyorai — the Buddha of Healing and Medicine — reflects the spiritual life of a family that served for generations as official physicians to the Tsubouchi feudal lords. Registered as a national tangible cultural property in 2007, the Yakushido offers visitors a quiet window into the intersection of medicine, faith, and daily life in Edo-period Japan.

The Imao Family: Physicians of the Tsubouchi Domain

The Imao family has deep roots in the community of Naka-Shinkanou-cho in Kakamigahara City, Gifu Prefecture. Since the late Edo period, the family served as the official physicians (goten-i) of the Tsubouchi clan, a prominent hatamoto (direct retainer of the Tokugawa shogunate) family. The Tsubouchi had governed the area since the early 17th century, when Tsubouchi Tosada was rewarded with 6,500 koku across 20 villages for his service at the Battle of Sekigahara in 1600. He established his base at the Shin-Kanou Jinya (administrative headquarters), around which the settlement grew.

For approximately 180 years, the Imao family has continuously practiced medicine in this location — a tradition that continues to this day through the modern Imao Clinic, which still operates just steps away from the historic compound. This remarkable continuity of purpose makes the family estate, and especially the Yakushido, a living monument to the enduring relationship between healing arts and spiritual devotion in Japanese culture.

Why the Yakushido Was Registered as a Cultural Property

The Imao Family Residence Yakushido was registered as a national tangible cultural property (registration number 21-0120) on May 15, 2007. It is one of six structures within the Imao compound that received registration on the same date, alongside the main house (shoya), detached building (hanare), rice storehouse (komegura), front gate with wall (omote-mon oyobi hei), and inner gate with wall (chu-mon oyobi hei).

The Yakushido earned its registration as a building that demonstrates regional character and historical significance. Private Buddhist halls within residential compounds were once more common in the homes of elite families during the Edo period, but many have been lost to modernization. The survival of the Yakushido within the Imao compound, along with the full ensemble of residential buildings and gates, provides valuable insight into the complete layout and spiritual life of a physician's household in a post-town setting.

The connection between the hall's dedication to Yakushi Nyorai — the Medicine Buddha — and the family's centuries-long medical profession adds a profound layer of cultural meaning that is rarely found elsewhere. This thematic unity between architecture, religion, and profession is one of the key reasons the structure holds such significance.

Highlights and Points of Interest

Surrounding Area and Nearby Attractions

The area around the Imao Family Residence offers a wealth of historical and cultural experiences connected to the Nakasendo highway and Edo-period heritage.

The Shin-Kanou Jinya Park preserves the site of the former Tsubouchi clan's administrative headquarters, with reconstructed gates and 23 historical interpretation panels that tell the story of the settlement. Within the old Shin-Kanou district, visitors can still trace the cranked path of the original Nakasendo road, see the site of the former ichiri-zuka (milestone mound) marking 104 ri from Edo, and explore several temples and shrines including Shorinji Temple, Zenkyuji Temple, Hokoji Temple, and Hiyoshi Shrine — known for its charming frog motifs.

Nearby, the beautifully restored Unuma-juku (Nakasendo Station No. 52) features preserved townhouses, a restored waki-honjin (secondary inn), and a visitor center that brings the atmosphere of Edo-period travel to life. The area is also close to the Kakamigahara Aerospace Museum, offering a striking contrast between historical and modern heritage. Shopping and dining are readily available at the nearby Aeon Mall Kakamigahara.