Nukabira Gensen-kyo (ぬかびら源泉郷)

Nukabira Gensen-kyo: The Secluded Forest Sanctuary of Pure Springs and Phantom Bridges

Nukabira Gensen-kyo is a destination for those who seek the “true north”—a quiet, soul-stirring retreat hidden deep within the primary forests of the Daisetsuzan National Park. Located on the shores of Lake Nukabira in the Tokachi region, this village is a pioneer of the “Gensen Kakenagashi” (100% natural-flowing) philosophy. Here, the hum of the modern world is replaced by the rustle of Yezo spruces and the occasional cry of a pika. Nukabira is world-famous for its “Phantom Bridge,” the Taushubetsu Bridge, which disappears beneath the water’s surface as the seasons change. It is a place of profound beauty and silence, where the restorative power of the springs is matched by the historical romance of ruins being reclaimed by nature.

Key Information

The Healing Waters: The Science of “Live” Hot Springs

In 2001, Nukabira was the first area in Hokkaido to issue a “Gensen Kakenagashi Declaration.” This means that every drop of water in the village’s baths is 100% natural—never diluted with tap water, never heated externally, and never recirculated through a filter. Scientifically, this preserves the “reduction tendency” of the minerals, ensuring the water acts as a powerful antioxidant for the skin. The springs are rich in sodium chloride and bicarbonate, creating a silky texture that gently exfoliates while forming a mineral film that keeps the body warm for hours. The water gushes from the source at temperatures between 50°C and 60°C, cooling naturally as it flows into the tubs. For onsen purists, Nukabira represents the highest standard of thermal therapy in Japan.

Top 5 Recommended Ryokans

• NUKABIRA ONSEN HOTEL (Authentic/Heritage): A cornerstone of the village, known for its warm, wood-paneled lobby and its exceptional forest-view baths. The meals feature authentic Daisetsu mountain trout and wild plant cuisine.
• Nukabirakan Kanko Hotel (Scale/Nature): The largest hotel in the area, offering a wide range of bath types including a massive outdoor rock bath that is surrounded by primary forest.
• Yumotokan (Historic/Rustic): The oldest inn in Nukabira, offering a nostalgic, mountain-hut atmosphere. It features multiple natural springs, including one of the area’s few remaining “mixed-gender” outdoor pools.
• Onsen Pension Mori no Fukuro (Cozy/Family): A charming wooden lodge run by a friendly local couple. Known for its “Star-viewing” terrace and its hearty, home-cooked Tokachi breakfasts.
Sanko So (Adventure/Base): A simple, welcoming inn favored by hikers and railway enthusiasts, offering budget-friendly stays and excellent thermal quality.

Must-Visit Public Baths (Soto-yu)

While Nukabira is a quiet village, the Nukabira Footbath in the town center is a mandatory stop. It is free to the public and located right next to the town’s visitor center. For a full immersion, the Yumotokan Mixed-Gender Bath is a historic “Soto-yu” experience; while accessible to non-guests for a fee, it offers a rare glimpse into traditional Japanese bathing culture. Note: Many hotels in the village participate in a “Yumeguri” (bath-hopping) pass, which allows travelers to visit three different ryokans’ baths for a single discounted price.

Walking Guide & Scenic Spots

The primary attraction is the Taushubetsu Bridge (Phantom Bridge). Built in 1937 for the former Shihoro railway line, this concrete arch bridge appears as a haunting skeleton on the dry lakebed in early summer and is completely submerged by winter. Guided tours are the only way to reach the bridge by foot. For a historical walk, follow the Forest Railway Ruins Trail, where you can see several other beautiful concrete arches hidden among the trees. In winter, a walk across the frozen Lake Nukabira allows you to see migratory birds and the rare “Ice Bubbles” trapped beneath the clear surface.

Local Gastronomy & Souvenirs

Nukabira is a culinary heaven for those who love Tokachi Beef and Soba. The area’s buckwheat is grown in the clean mountain air, resulting in noodles with a deep, nutty flavor. Try Venison Stew, a local specialty of Kamishihoro. For souvenirs, look for Ainu-inspired wood carvings and local honey from the linden trees. The Kamishihoro Town Rail Museum also sells unique railway memorabilia and “Phantom Bridge” postcards.

Cultural & Historical Context

The village was established during the construction of the JNR Shihoro line in the early 20th century. While the railway was abandoned in 1987, the residents chose to preserve the bridge ruins as a monument to Hokkaido’s pioneering era. The name “Nukabira” comes from the Ainu word nuka-pira, meaning “cliff with human forms,” referring to the strange rock formations along the river. Today, the village is a center for Eco-tourism, focusing on the preservation of the Daisetsuzan ecosystem and the rare Northern Pika (*Naki-usagi*).

Practical Travel Tips

Taushubetsu Tours: You cannot drive to the bridge yourself; you must book a tour with the Kamishihoro Guide Center well in advance. Wildlife: Red foxes and Ezo deer are common in the village; keep your car doors locked and never feed the animals. Cash: There are no major banks or convenience stores in the village; bring plenty of Japanese Yen for local activities and dining. Winter Travel: The road between Nukabira and Lake Shikaribetsu is closed in winter; always check the Route 273 status before departing.

2025-2026 Latest Updates

In March 2026, the JOC Junior Olympic Cup National Alpine Ski Championships will be held at the Nukabira Gensen-kyo Ski Resort, making it a lively hub for sports enthusiasts. Additionally, the Taushubetsu Bridge Restoration Fund will host special “Sunset Photo Sessions” for donors in the summer of 2025, as the bridge’s deterioration makes this one of the final years to see it in its iconic arch shape.

Safety & Manners

In the onsen, do not splash water and always maintain a quiet, respectful tone to honor the meditative atmosphere of the “Gensen Kakenagashi.” When walking on the frozen lake in winter, stay strictly on the guided paths, as the ice thickness can vary. Finally, please pack out all trash; the village is located in a core zone of the National Park, and maintaining the forest’s purity is a community priority.