Katoya Ryokan Yusenkaku: A Living Treasure of Itamuro's Post-War Inn Architecture

Tucked away at the innermost end of Itamuro Onsen, a tranquil mountain hot-spring village in northern Tochigi Prefecture, stands Katoya Ryokan Yusenkaku — a graceful two-story wooden building completed in 1952 that captures the refined craftsmanship of early post-war Japanese inn architecture. Together with the Main Building (Honkan, 1919) and the Annex (Bekkan, late Taisho to early Showa), Yusenkaku forms a rare three-building ensemble of historic ryokan architecture that was registered as a National Tangible Cultural Property in February 2016. For travelers seeking an unhurried encounter with the atmosphere of a traditional Japanese healing spa, Yusenkaku offers a window into a vanishing world.

The Story of Itamuro Onsen and the Katoya Inn

Itamuro Onsen lies along the Yu-gawa, a tributary of the Naka-gawa River, in a quiet mountain valley at the western foot of the Nasu Range. According to local tradition, the springs were discovered in 1059 by Nasu Munenori, lord of Nasu, during a hunting expedition. For more than nine and a half centuries, the alkaline simple thermal waters here have been revered as the "medicinal waters of Shimotsuke" (Shimotsuke no Kusuriyu), prized for their reputed effects on neuralgia, rheumatism, and post-illness recovery.

Through the Edo period, Itamuro grew into one of the Seven Hot Springs of Nasu (Nasu Shichi-yu), drawing patients and travelers on long, contemplative stays known as toji — extended therapeutic bathing retreats during which guests would typically cook their own meals in shared kitchens. The town was designated a National Health Resort Hot Spring (Kokumin Hoyo Onsenchi) in 1971.

Katoya Ryokan, operated by the Takanezawa family, sits at the deepest point of this historic spa street. In March 1978, a major fire swept through Itamuro, destroying many of its wooden inns. Katoya survived, and today its three connected buildings remain among the few that still convey the texture of the pre-war toji village.

Yusenkaku: A Showcase of Post-War Inn Design

Yusenkaku was completed in 1952, as confirmed by official registry records. While its bath area and the corridor connecting it to the Annex have been modified for practical use, the rest of the structure has survived virtually unchanged for more than seven decades.

The building is a two-story wooden structure measuring approximately 8.79 meters along the front and 8.03 meters in depth. The roof is a kirizuma (gable) form clad in metal sheeting laid with vertical battens (teppan kawara-bo-buki). A distinctive gable eave (noki-hafu) projects toward the street, and the canopy above the main entrance carries an irimoya-style hafu — a refined detail more often associated with temple or shrine architecture than with everyday inns. The lower portions of the exterior walls are finished in arai-dashi (a textured, washed-out plaster technique), while upper sections are coated in white shikkui plaster, with small shitaji-mado lattice windows in each guest room adding rhythmic accents to the facade.

The ground floor follows the same logic as the Main Building: a two-ken-wide entrance with four sliding glass doors bearing the shop's crest, a six-tatami guest room with a wooden-floored ita-no-ma section, and large and small bathing rooms positioned along the Yu-gawa side. Upstairs, four guest rooms are arranged around a central western staircase — a 4.5-mat room, a 6-mat room with tokonoma alcove, an 8-mat room with tokonoma, and a 10-mat room with tokonoma. Precious wood (meiboku) was selected for the entrance and for tokonoma details throughout, and each guest room entrance is given its own decorative pent canopy. Taken together, the entrance and interiors record the moment when Japanese inn architecture began to express renewed confidence after the war.

Why Yusenkaku Was Designated a Cultural Property

Yusenkaku was registered as a National Tangible Cultural Property on February 25, 2016, together with the Main Building and the Annex. What makes the designation particularly significant is the survival of all three buildings as a continuous architectural sequence.

The Main Building preserves the rustic atmosphere of a Taisho-era toji inn, where guests on long therapeutic stays self-catered in modest, shared quarters. The Annex incorporates Western-style architectural touches that became fashionable for ryokan in the late 1920s and 1930s. Yusenkaku then represents the early 1950s — a moment when the country was emerging from wartime austerity and inns began once again to compete with one another through refined design. Three generations of Japanese ryokan history stand shoulder to shoulder along a single stretch of street, preserving the layered historical landscape of the toji village in a way that has become extraordinarily rare elsewhere in Japan.

Highlights for Visitors

For travelers approaching the building, several features reward close observation:

  • The irimoya-shaped canopy above the main entrance, an unusually ornate touch for a small mountain inn
  • The four-panel sliding glass doors with the inn's traditional crest, framed by a two-ken-wide entrance
  • The arai-dashi lower walls paired with white plaster above, accented by shitaji-mado windows
  • The selection of meiboku (named timbers) throughout the entrance hall and tokonoma alcoves
  • The continuous facade formed by the Main Building, Annex, and Yusenkaku — a streetscape ensemble of three eras

The hot spring itself is also a draw. The waters at Katoya are described as a strongly alkaline simple thermal spring, often measured at pH 9.6 or higher, with abundant flow drawn from the inn's own source. Bathers describe the soft, silky character of the water, and the bathing rooms feature multiple tubs at different temperatures fed continuously by fresh spring flow.

Visitor Information

Katoya Ryokan welcomes overnight guests as well as day-trippers seeking a soak in its hot spring waters. The inn operates from its current facilities; some of the historic interiors of the upper floors are preserved but not used for guest stays. Travelers interested in seeing the cultural property buildings should reach out in advance, as access depends on the inn's schedule.

The inn is reached easily by public transport. From JR Nasushiobara Station on the Tohoku Shinkansen, a bus via Kuroiso takes about 50 minutes to the "Itamuro Onsen" stop, followed by a one-minute walk. From JR Kuroiso Station on the Tohoku Main Line, the bus journey is about 35 minutes. By car, the inn is roughly 20 minutes from the Kuroiso-Itamuro IC on the Tohoku Expressway.

Exploring the Surrounding Area

Itamuro lies within Nikko National Park, surrounded by valleys, waterfalls, and alpine wetlands that make the area rewarding well beyond the bath alone.

Otome no Taki, the "Maiden's Falls," is a slender ten-meter cascade reached by a short forest path roughly 2.3 kilometers from the village. The falls take their name from a legend in which the streaming water resembles the long hair of a young woman, and the surrounding ravine is particularly beautiful in fresh spring greenery and autumn color.

Higher up the same valley system lies Numappara Wetland, an alpine bog at around 1,230 meters above sea level on the western flanks of Mount Chausu. The wetland is famed for its summer blooms of nikkokisuge day lilies and offers gentle boardwalk walking against a backdrop of the Nasu peaks. Other nearby destinations include Miyama Dam, the wooded gorge of Kinomata Keikoku, the small Itamuro Onsen Shrine within the village, and several local dairies producing milk and cheese in the foothills.

📍 Plan Your Visit to Tochigi
Find tours, activities & transport passes near Kadoya Ryokan Yusenkaku
[ Nikko Toshogu Shrine & Kegon Falls Day Trip ]

Q&A

QWhat kind of cultural property is Yusenkaku?
AYusenkaku is a Registered Tangible Cultural Property of Japan, designated on February 25, 2016. It was registered together with the Main Building and the Annex of Katoya Ryokan as a three-building ensemble representing the historic architecture of Itamuro Onsen.
QWhen was Yusenkaku built and how do we know?
AYusenkaku was completed in 1952, a date confirmed by the building's official property registry. Apart from the bath area and the corridor that connects it to the Annex, the structure shows virtually no later alteration.
QCan I stay overnight or visit during the day?
AYes. Katoya Ryokan accepts both overnight guests and day-use bathers. The inn's check-in is from 15:00 and check-out is at 10:00. As schedules can vary, it is best to call ahead to confirm availability, especially for day-use bathing.
QWhat is special about the hot spring water at Katoya?
AThe waters at Itamuro Onsen are a strongly alkaline simple thermal spring, often measuring around pH 9.6 or higher. The springs have long been called "the medicinal waters of Shimotsuke," reputed since the Heian period for their soft, silky touch and their reputed benefits for fatigue and joint complaints.
QHow do I get there from Tokyo?
ATake the Tohoku Shinkansen from Tokyo to Nasushiobara Station (approximately 70 to 80 minutes), then a local bus via Kuroiso to "Itamuro Onsen," about 50 minutes. The inn is a one-minute walk from the bus stop.

Basic Information

Name Katoya Ryokan Yusenkaku (Main Building, Annex and Yusenkaku of Katoya Ryokan)
Category National Tangible Cultural Property (Registered), Building
Date of Registration February 25, 2016
Year of Construction 1952 (Showa 27)
Structure Wooden, two-story; gable-roofed (kirizuma) with metal-sheet vertical-batten roofing
Dimensions Approx. 8.79 m frontage × 8.03 m depth
Designated Address 854 and others, Aza-Shiozawa, Itamuro, Nasushiobara City, Tochigi Prefecture
Operating Address 859 Itamuro, Nasushiobara City, Tochigi Prefecture 325-0111
Owner Private ownership (operated by the Takanezawa family)
Telephone 0287-69-0201
Access About 50 minutes by bus from JR Nasushiobara Station (Tohoku Shinkansen) via Kuroiso to "Itamuro Onsen," then 1 minute on foot

References

Katoya Ryokan | Nasushiobara City Official Website
https://www.city.nasushiobara.tochigi.jp/soshikikarasagasu/shogaigakushuka/bunkazai/2/6/2615.html
Access | Registered Tangible Cultural Property Katoya Ryokan (Official Inn Website)
https://nasu-kadoya.jp/access/
Itamuro Onsen | Kuroiso Tourist Association
https://www.kuroiso-kankou.org/itamuro/
Itamuro Onsen | Wikipedia
https://ja.wikipedia.org/wiki/%E6%9D%BF%E5%AE%A4%E6%B8%A9%E6%B3%89
Otome no Taki | Nippon Tabi Magazine
https://tabi-mag.jp/tg0279/

Last verified: 2026.05.14