Katakurakan is a historic hot spring facility located in the Kamisuwa Onsen area of Suwa City, Nagano Prefecture. Standing beside Lake Suwa, the impressive Western-style architecture creates a distinctive atmosphere that has been preserved for nearly a century.
Managed by the Katakurakan Foundation, the complex consists of three buildings: the Assembly Hall, Bathhouse, and connecting passageway. All three were designated as National Important Cultural Properties in 2011. The facility is particularly famous for its spacious Sen’nin Buro, or “Bath for a Thousand People,” with a bathing pool approximately 1.1 meters deep.
The same grounds are also home to the Suwa City Museum of Art, making Katakurakan an unusual destination where historic architecture, art, and Japanese hot spring culture come together.
Katakurakan was designed by architect Matsunosuke Moriyama. Although primarily Western in appearance, the buildings incorporate Japanese decorative elements, creating a distinctive architectural style. The design is often described as having influences from Gothic Revival and Romantic Revival architecture, while harmonizing beautifully with the scenery around Lake Suwa.
The bathhouse is a two-story reinforced-concrete structure whose exterior walls feature distinctive scratched tiles. The Assembly Hall combines wooden and reinforced-concrete construction and contains a huge 204-tatami-mat hall with a stage, providing a versatile space for gatherings and cultural activities.
The fountain pool and stone walls on the grounds are also included in the cultural property designation, meaning that the historical value of Katakurakan extends beyond the individual buildings to the surrounding site.
The highlight of Katakurakan is undoubtedly the Sen’nin Buro. The large bathing pool measures approximately 4 meters wide, 7.5 meters long, and 1.1 meters deep. Its floor is covered with smooth river stones that provide a gentle sensation underfoot as bathers move through the water.
The edge of the pool has two levels of steps, allowing visitors to choose a comfortable bathing depth. The hot spring water is classified as a simple hot spring. Traditionally, bathing in the water has been associated with relief from conditions such as neuralgia, rheumatism, diabetes, and gastrointestinal disorders.
Beyond the main bath, the facility includes a jacuzzi bath, relaxation rooms, private rooms available for rental, and the large stage-equipped hall. These facilities have made Katakurakan popular not only with travelers but also with local residents seeking a place to relax.
The stained glass and other decorative details inside the bathhouse are also worth seeing. Visitors can appreciate the artistic atmosphere of the historic building while enjoying the hot spring experience.
Katakurakan was built in 1928 by Kanetaro Katakura II, the second-generation head of the Katakura industrial group. As president of Katakura Silk Spinning Co., Ltd., he played an important role in developing the silk industry while also working to improve the welfare of employees and local residents.
One of the original purposes of Katakurakan was to provide a welfare facility where female silk workers could enjoy better health and relaxation. The project also reflected an intention to give back to the local community and help harmonize competing interests among waterwheel operators along the Tenryu River and farmers living around the lake.
During his travels in Europe and North America, Kanetaro Katakura was impressed by the development of welfare facilities and culturally significant architecture. After returning to Japan, he sought to introduce similar ideas to his own community.
He invested a fund of 800,000 yen in the construction of Katakurakan and established the Katakurakan Foundation in 1929. From its earliest days, the facility was intended to be open to the public, and it continues to serve the community today.
Katakurakan’s distinctive architecture and atmospheric interiors have also attracted filmmakers. The historic bathhouse has been used as a filming location for movies and television productions.
One notable example is the 2014 film “Thermae Romae II,” in which Katakurakan served as one of the major filming locations. Its grand bathing space provided an evocative setting reminiscent of an ancient Roman bathhouse.
Katakurakan is generally open from 10:00 a.m. to 8:00 p.m., with reception closing at 7:30 p.m. The relaxation room can be used until 7:00 p.m., while restaurant orders are accepted from 11:00 a.m. to 3:00 p.m.
The facility is closed on the second and fourth Tuesdays of each month. When a scheduled closing day falls on a public holiday, the facility is closed on the following day instead.
Katakurakan is approximately 5 minutes on foot from the Suwa Lake Exit, or West Exit, of JR Kamisuwa Station on the Chuo Main Line. By car, it is approximately 7 kilometers from the Suwa Interchange on the Chuo Expressway via Lake Suwa.
Its convenient location makes Katakurakan an easy addition to a sightseeing itinerary around Lake Suwa, particularly for visitors combining a lakeside walk with a traditional Japanese hot spring experience.
Katakurakan is far more than an ordinary hot spring facility. Its historic buildings, distinctive architecture, community-oriented origins, and famous Sen’nin Buro make it one of the cultural landmarks of Suwa.
The building embodies the atmosphere of early 20th-century Japan while reflecting the vision of a local industrial leader who sought to improve the lives of workers and residents. Today, visitors can experience that history firsthand by bathing in the traditional hot spring, admiring the architectural details, and exploring the surrounding Lake Suwa area.
For travelers interested in Japanese hot springs, historic architecture, industrial heritage, and local culture, Katakurakan offers a memorable way to experience the character of Suwa while enjoying the healing atmosphere of a traditional onsen.