Kajihara Family Residence Uchi-Ōkura: An Edo-Period Earthen Storehouse in Himeji's Historic Salt Town

Tucked away in the quiet coastal district of Ōshio in southeastern Himeji City, the Kajihara Family Residence Uchi-Ōkura (梶原家住宅内大蔵) stands as a striking testament to the prosperity of Edo-period salt industry landowners. This two-story earthen storehouse, with its gleaming white plaster walls and distinctive diamond-patterned namako-kabe base, is one of many buildings within the expansive Kajihara estate that have been designated as nationally registered tangible cultural properties. For visitors seeking authentic Japanese heritage beyond the well-trodden tourist paths, this hidden gem in Hyogo Prefecture offers a rare window into the architectural legacy of a salt-producing dynasty.

The Kajihara Family and the Salt Heritage of Ōshio

The town of Ōshio, as its name literally suggests ("great salt"), has deep roots in the salt production industry. From ancient times through the 1950s, vast salt evaporation fields stretched across the southern landscape below the Sanyo Electric Railway tracks. The wealth generated by this thriving industry gave rise to a number of grand estates, and among the most prominent were those belonging to the Kajihara family.

Known locally as "Nishi-Kajihara" (West Kajihara), the main branch of the family built an extraordinary residential compound at the heart of Ōshio. The estate encompasses the main house built during the Kaei era (1848–1854), multiple detached parlors, tea ceremony rooms, rice storehouses, a carpenter's warehouse, and several earthen storehouses — including the Uchi-Ōkura. Together, these structures paint a vivid picture of the refined lifestyle enjoyed by the salt field landowners of Harima Province.

Architectural Features of the Uchi-Ōkura

The Uchi-Ōkura, meaning "inner great storehouse," is situated to the southeast of the south detached parlor within the compound. It is oriented on a north-south axis with a gable roof clad in traditional hon-kawara tiles. The structure measures approximately 12 meters in length and 5.7 meters in width, giving it a generous floor area of about 82 square meters.

The building is constructed in the dozō-zukuri style — a fire-resistant earthen storehouse technique that was widely used by wealthy merchant families to protect their valuables. The exterior walls are finished in pure white plaster (shiro-shikkui), presenting a clean and dignified appearance. Along the west face, which opens onto a connecting corridor (watarō-rōka), a doorway provides access to the interior. The lower portion of the walls on this side features namako-kabe, a decorative technique using raised plaster joints between flat tiles arranged in a diamond pattern — both beautiful and functional as protection against moisture and fire.

Inside, both the first and second floors are divided into two rooms running north to south. The north room on the second floor is notable for its flooring of unusually wide wooden boards, suggesting it was designed for the careful storage of important household possessions. Throughout the building, fine craftsmanship is evident, particularly in the carved bracket supports (mochisokuri) beneath the window eaves — small but telling details that reflect the high standards maintained by the Kajihara family even in their utilitarian structures.

Why It Was Designated a Registered Tangible Cultural Property

The Uchi-Ōkura was registered as a nationally registered tangible cultural property (building) on November 2, 2009, along with numerous other structures on the Kajihara estate. Its significance lies in several factors. First, it is an outstanding example of late Edo-period storehouse architecture, originally built between 1830 and 1867, with later additions during the Taishō era (1912–1925) and a modification around 1947. This layered construction history makes it a valuable record of how traditional buildings were adapted over time.

Second, the Uchi-Ōkura forms an integral part of the larger Kajihara residential complex, which collectively represents one of the finest surviving examples of a salt industry magnate's estate in the Harima region. The quality of construction — from the carefully applied plaster to the decorative bracket work — demonstrates the considerable resources and aesthetic sensibility of its original builders.

Finally, the building contributes to our understanding of traditional Japanese storage architecture (kura) and the role these structures played in the domestic economy of wealthy families during the late feudal and early modern periods.

Highlights and Points of Interest

While the interior of the Kajihara estate is not open to the public, the exterior of the compound is well worth visiting. The main gate, fronted by traditional bamboo inuyarai fences, presents a photogenic scene that has attracted film crews — the estate served as a filming location for the NHK drama "Kikutei Yaozen no Hitobito." Walking along the perimeter, visitors can appreciate the imposing scale of the compound's walls and catch glimpses of the white-plastered storehouses rising above them.

The surrounding Ōshio townscape itself is a highlight. The narrow alleys winding between traditional wooden houses with kawara tile roofs create an atmosphere that feels frozen in time. Other grand estates of former salt field owners dot the neighborhood, and the entire district offers an unhurried exploration that contrasts beautifully with the bustle of central Himeji.

Nearby Attractions

A visit to the Kajihara estate pairs naturally with several other points of interest in the area. Ōshio Tenman-gū Shrine, located directly beside Ōshio Station, is celebrated for its spectacular autumn festival held every October 14–15, featuring the Ke-jishi (hair lion dance), designated as an important intangible folk cultural property of Hyogo Prefecture. The energetic parade of ornate festival floats (yatai) through the narrow streets is a thrilling sight.

For those with more time, Himeji Castle — one of Japan's most iconic World Heritage Sites — is only about 11 minutes away by limited express train from Ōshio Station. The castle's brilliant white facade echoes the plaster walls of the Kajihara storehouses, offering a fascinating visual and thematic connection between the two sites.

Nature lovers may also enjoy the Himeji seaside area south of Ōshio, where the former salt fields have been transformed into parks and open spaces along the coast.