Shiraiya

Shiraiya: A Meiji-Era Inn Preserving the Spirit of Japan's Historic Highways

Tucked away in the quiet town center of Nakanojo in Gunma Prefecture, Shiraiya is a remarkable wooden inn that has stood since the Meiji period. Registered as a national tangible cultural property in 2001, this two-story structure offers visitors a rare glimpse into the world of traditional Japanese travel accommodation — the hatago — as it existed over 130 years ago. With its distinctive overhanging second floor and unassuming "Travelers' Inn" signboard still displayed at the entrance, Shiraiya stands as a living testament to a bygone era of highway travel in Japan's mountainous interior.

History of Shiraiya

Shiraiya is believed to have opened for business around 1892 (Meiji 25), a period when government offices and public buildings were beginning to appear in the Nakanojo area. The town of Nakanojo served as a regional hub in the Agatsuma District of Gunma Prefecture, situated along a new road that connected to the wakiōkan — a secondary highway branching off the historic Mikuni Kaidō route.

The Mikuni Kaidō was one of Japan's important secondary highways during the Edo period, linking Takasaki in Gunma with Teradomari in Niigata via the Mikuni Pass. While the main highway carried feudal lords on their processions to and from Edo, the network of side routes that branched off from it served local travelers, merchants, and pilgrims heading to the region's many hot spring resorts. Shiraiya was established to accommodate these travelers as the town modernized during the early Meiji era.

As Japan's transportation networks evolved with the coming of railways, many traditional inns along the old highway routes gradually disappeared. Shiraiya, however, has survived remarkably intact, preserving its original Meiji-period architectural character in a region where such structures have become increasingly rare.

Why Shiraiya Is a Registered Tangible Cultural Property

Shiraiya was registered as a national tangible cultural property (building) on August 28, 2001. Japan's cultural property registration system was established in 1996 to protect a broad range of architectural heritage — particularly structures from the modern era that risk being lost due to urban development, changing lifestyles, and neglect. Unlike the more restrictive designation system for Important Cultural Properties, the registration system employs a flexible approach based on notification and guidance, allowing buildings to remain in use while being recognized for their historical value.

Shiraiya met the registration criteria as a structure that serves as a "model for the scale and form" of its type. As one of the few surviving Meiji-era hatago (travelers' inns) in the region, it provides invaluable evidence of how accommodation facilities were designed and operated during a transformative period in Japanese history. The building's well-preserved segai-zukuri construction and its intact arrangement of guest rooms make it an important example of Meiji-period commercial architecture in rural Japan.

Architectural Highlights

Shiraiya is a wooden two-story building with a gable roof (kirizuma-zukuri) covered in metal sheeting. The building faces east onto the street and features a hirairі (flat-entry) orientation, meaning the entrance is on the long side of the building beneath the eaves. The structure measures seven ken (approximately 12.7 meters) in frontage and four ken (approximately 7.3 meters) in depth, with a total building area of 111 square meters.

The most striking feature of the building is its second floor, which is constructed in the segai-zukuri style. In this traditional technique, horizontal beams (called udegi or "arm timbers") extend outward from the first-floor wall structure, creating an overhang that supports the upper story. This technique, originally derived from Japanese boatbuilding — where similar extensions were used to widen the deck area of vessels — allows the second floor to project beyond the footprint of the first floor. At Shiraiya, this overhang runs the full width of the facade, creating a dramatic visual effect and providing a covered walkway area below.

Along the overhanging second floor, a continuous wooden railing (tesuri) extends across the entire frontage, with shoji sliding screens visible behind it — largely unchanged since the building's construction. The second floor houses five guest rooms, each measuring six tatami mats in size, arranged to accommodate travelers staying overnight.

At the front of the building, the original signboard bearing the characters for "Travelers' Inn" (旅人宿) remains in place, offering a tangible connection to the building's original purpose and the culture of highway travel in Meiji-era Japan.

Understanding Segai-Zukuri Architecture

The segai-zukuri technique seen at Shiraiya is a distinctive feature of traditional Japanese vernacular architecture, found primarily in the eastern regions of Japan. The term "segai" is thought to derive from "sengai" (船外), meaning "outside the boat," reflecting the technique's origins in Japanese wooden shipbuilding where planks were extended beyond the hull to create additional working space.

In architectural application, segai-zukuri involves extending horizontal beams from the main structural columns outward beyond the exterior wall. These cantilevered beams support additional floor space or deep eaves, providing protection from rain and snow — a practical consideration in regions with heavy precipitation. The technique was considered a mark of status and was commonly employed in buildings of some prestige, including merchant houses, inns, and shrine architecture.

While segai-zukuri can be found in various regions across Japan — from Iwate and Miyagi in the north to Ehime in the west — examples in Gunma Prefecture are particularly notable given the region's position along major highway routes where impressive inn architecture was valued as a sign of quality accommodation.

Visiting Shiraiya

Shiraiya is located in the central area of Nakanojo town, easily accessible on foot from Nakanojo Station on the JR Agatsuma Line. The building can be appreciated from the street, where its distinctive overhanging second floor and traditional signboard create a striking contrast with the surrounding modern townscape. As this is a privately owned building, please observe it respectfully from the public road and be mindful of the owners' privacy.

A visit to Shiraiya pairs well with exploring the broader Nakanojo area, which retains pockets of retro charm from its days as a bustling commercial center. The streets around the station and the neighboring Isemachi district still preserve elements of the Showa-era townscape, with traditional shops and local eateries offering an authentic small-town atmosphere.

Nearby Attractions

Nakanojo town serves as the gateway to some of Gunma Prefecture's most celebrated natural and cultural attractions. The area offers a wealth of experiences for visitors who wish to combine cultural heritage exploration with hot spring relaxation and mountain scenery.

• Shima Onsen: One of Japan's most atmospheric hot spring towns, located about 30 minutes by bus from Nakanojo Station. Known for its healing mineral waters and the historic Sekizenkan inn, whose main building dates to 1691 and is said to have inspired the bathhouse in the animated film "Spirited Away."
• Nakanojo Town Museum of History and Folklore (Musée): A local museum housed in a Western-style building from 1885, showcasing the history and culture of the Agatsuma region.
• Nakanojo Furusato Exchange Center "Tsumuji": A community hub featuring a café, local craft shops, and a foot bath, located within walking distance of the station.
• Nakanojo Biennale: An international contemporary art festival held every two years, transforming the town's historic buildings and natural landscapes into exhibition spaces.
• Sawatari Onsen: A quieter hot spring village known for its skin-beautifying waters, accessible by bus from Nakanojo Station.
• Takeyama (Mount Take): A sacred mountain with 33 Kannon statues scattered along its trails, offering hiking and panoramic views of the surrounding countryside.