Nationwide × Hidden Hot Spring AccommodationRecommended Hotel·Ryokan for family trips

With a history of 700 years, this rare Onsen, known for its healing properties for eye ailments, is one of the hidden gems in the whole country. The "Eye Medicine Bath," featuring 100% natural flowing hot spring water, offers lukewarm temperatures perfect for long soaks. Enjoy this historic hidden Onsen, once used as a secret retreat by Uesugi Kenshin.

A single accommodation, "Hotel Iya Onsen," is located on the cliffs of the Iya Valley. An open-air bath is situated at the bottom of the valley, approximately 170 meters down via cable car, where you can soak while enjoying the stunning views of the gorge. The beauty of the valley can also be admired from the guest rooms.

A long-established Property located on the slopes of Mount Eboshi, one of the five peaks of Mount Aso, preserving the Jigoku Onsen which first opened in 1803. Stepping into the main building, which is over 100 years old and has been renovated after the Kumamoto Earthquake, feels like entering a different world, as if traveling back in time. The Onsen features three different sources, offering 11 baths across four locations, each with unique water qualities and atmospheres. Guests can enjoy the "Suzume no Yu," a "miraculous bath" rich in sulfur content with water bubbling up from the ground, as well as the highly acidic "Moto no Yu" and "Tamago no Yu," choosing baths based on their benefits and purposes. For dinner, a variety of courses are available, including seasonal hot pots, irori hearth dishes, and Kyoto-style kaiseki cuisine. Local wild boar and venison, caught by local hunters, offer a rustic and unique taste of Aso. Experience the blessings of magnificent nature through the Onsen and cuisine.

The mixed-gender open-air bath "Taki no Yu," the only one in Kurokawa Onsen selected as one of Japan's Top 100 Secret Hot Springs, offers not only exceptional water quality but also a sense of traditional Japanese onsen charm. The nostalgic property features 13 different onsens, allowing guests to enjoy a variety of baths within the accommodation.

Welcome to Iwai Onsen Iwaiya. This secluded hot-spring retreat, said to be the oldest in the San’in region, offers 100% free-flowing natural spring water throughout the property—even in the showers. In our 150-year-old, traditional three-story wooden inn, enjoy a distinctly Japanese atmosphere filled with folk-style furnishings and local wildflowers, along with the flavors of San’in cuisine for a truly relaxing stay. Tottori’s only Onsen member of “The Association to Protect Japan’s Secret Hot Springs.” Michelin Guide Kyoto-Osaka + Tottori 2019: Two Stars

Midway between Lake Tazawa and Kakunodate. Stroll through forested paths while enjoying views of the azure lake and streams. "Natsuse Onsen Miyakowasure," surrounded by expansive grounds and mountains, offers only 10 guest rooms, each featuring an open-air bath with flowing onsen water and views of the Dakigaeri Gorge, making it an ideal secluded retreat.

Meto Onsen Hotel has been cherished as a therapeutic hot spring since its opening in 1901. The Onsen water, unchanged since its discovery, is 100% natural, free-flowing from the source, with no reheating. Enjoy the alkaline simple Onsen with a pH of 9.5, flowing at 120 liters per minute at a source temperature of 60°C, emerging by the Nukanan River from the Daisetsu mountain range. Surrounded by pristine forests, the open-air baths offer a serene natural environment. Relax and rejuvenate in the 100% natural, free-flowing Onsen, and savor your time of bathing. In November 2024, we opened the secluded accommodation wing, "Suou no Iori." This exclusive one-group-per-day private villa is nestled in the heart of nature, featuring a luxurious natural Onsen open-air bath, a wooden deck, a dome-shaped sauna with a wood-burning stove (additional charge depending on the Plan), and an outdoor cold bath. For dining, we present "Yamasemi," a new gourmet space also established in 2024. This addition brings a touch of the extraordinary to the over 100-year history of the hidden gem, Meto Onsen. We look forward to welcoming you.

Experience one of the hidden hot springs, Nyuto Seven Onsen, surrounded by a beech forest. Enjoy two natural Onsen, Nyuto Onsen and Tazawako Kogen Onsen, in both indoor and open-air baths. The open-air bath, encircled by beech trees, offers a forest bathing-like experience, bringing deep relaxation. For dinner, indulge in a buffet of approximately 40 dishes featuring Akita's specialty cuisine, filled with local flavors to your satisfaction. Unique activity programs exclusive to Kyukamura are available, including the "Beech Forest Walking" during the summer season, where you can breathe in the fresh, clean air.

Asahidake Onsen "Yumoto Yukomanso" is a Property located within Daisetsuzan National Park, where you can enjoy five natural hot spring sources and the great outdoors. Situated at Asahidake in the Daisetsuzan mountain range, Yukomanso is surrounded by majestic nature and beautiful alpine plants, beloved by many hikers. In spring, you can see budding plants amidst the lingering snow; in summer, vibrant alpine flowers in full bloom; in autumn, Japan's earliest autumn foliage; and in winter, the finest powder snow. The Onsen at Yukomanso has been continuously flowing since its discovery in 1914, providing over 300 liters of water per minute as its source. All five hot spring sources are natural free-flowing springs. Without any temperature adjustments, the spring water is directly channeled into the baths, allowing you to truly feel the blessings of nature. Water, air, Onsen... Spend a luxurious time surrounded by the wonders of nature.

Opened in 2006, with a detached suite added in April 2011. The Iya Valley, where the Iya River flows from Mount Tsurugi and carves a V-shape into the Shikoku Mountains, offers breathtakingly majestic gorge scenery. "Keikoku no Kakure Yado Iya Bijin" is a Property with an Onsen and a soba restaurant, located right in front of this lush green valley and clear stream. Originally opened in 1975 as a handmade soba restaurant using local buckwheat and spring water, the Property later added 8 Rooms and a detached accommodation to provide visitors to Iya with a more relaxing and leisurely stay. All Rooms are equipped with open-air baths, allowing guests to fully enjoy the Onsen while admiring the stunning views. For meals, indulge in unique dishes featuring local river fish and vegetables, or gather around the irori hearth for hot pot and charcoal-grilled delicacies. To finish, savor our specialty Iya soba. Immerse yourself in the crisp air of the valley, soak in the Onsen, and enjoy delicious cuisine. As your daily fatigue melts away, you may find yourself thinking, "Ah, happiness..." We hope you can experience such a moment here.

The onsen village of Kuni Shiri-yaki, recognized as "Japan's Most Beautiful Village," is a hidden retreat embraced by nature and tranquility. Enjoy the abundant onsen water flowing directly from the riverbed. Relax in the open-air baths overlooking the mountains and river or in your room.

Nestled at the foot of Mount Chausudake, the main peak of the Nasu Mountain Range, for over 200 years. This exquisite Onsen accommodation quietly stands in the Oku-Nasu Onsen Village at an altitude of 1,300 meters.

The tranquility and gentle flow of the seasons are gifts from the heavens. Walk through the deep green woods. Cross the babbling brook. Reflect under the shadow of crimson leaves. "Kannon Onsen," a property with natural onsen, stands quietly in a serene mountain valley, where the ever-changing beauty of the seasons is reflected. Escape from daily concerns, free your mind and body, and relax at this "healing property."

Hidden Retreat Shirakawa Gensen Sanso Takefue is set on an expansive 5,000-tsubo property, featuring only 12 private villas and a spa building, along with 30 natural hot spring baths flowing directly from our own sources. All guest rooms are designed in a modern Japanese style and include an irori (traditional sunken hearth), tatami room, and indoor bath. Eight of the villas also offer open-air baths over 5 meters in size, blending beautifully with the surrounding nature. Meals are served in the comfort of your room at the irori for both dinner and breakfast. This is a serene hideaway for adults to enjoy a luxurious retreat immersed in nature, offering you time to relax and savor the unique Takefue experience.

A hidden wooden accommodation located deep in Yunishigawa Onsen offers natural flowing hot spring open-air baths and private open-air baths. The "Bokyotei," a relocated traditional house over 80 years old, is perfect for group stays and features its own private open-air bath. Additionally, guests can enjoy a large open-air bath showcasing the changing seasons, as well as a dining area serving irori-style cuisine and local sake.

The Yumoto Saito Ryokan, with a history of 284 years, is a charming property blending the Shirahone Onsen and the traditional ambiance of Shinshu. The onsen, sourced from its own spring since the Kamakura period, is milky white and is said to be effective for gastrointestinal ailments. All 53 guest rooms are named after notable novelists and poets, offering a serene space for relaxation. Additionally, you can savor Japanese seasonal course meals featuring the bounty of Shinshu's mountains and rivers.

In the Nyuto Onsenkyo area, there are numerous properties with excellent onsen qualities. Among them, Nyuto Onsenkyo Myounoyu is a proud property combining the two sources of 'Golden' and 'Silver' onsen, viewed from Kansai. Additionally, it is highly appreciated as a charming property that balances the simplicity and antiquity of a small hidden onsen with modernity.

Finally, the sauna is complete! High reviews are for "Irori Kaiseki cuisine enjoyed at a hidden onsen in the mountains." The traditional atmosphere of the healing place is sure to soothe everyone. Always considering the coexistence of newness and tradition. An onsen unchanged since the Edo period to relieve travelers' fatigue. Thoughtfully prepared Kaiseki cuisine and carefully selected sake by the host. Relax and rejuvenate in the new sauna.

Known as the last onsen of Kanto, this property is located deep in the mountains, surrounded by pristine nature. To reach the property, you can either hike along a trail or use the dedicated shuttle service. The guest rooms, newly opened in 2023, feature private open-air baths, offering a secluded and intimate space. Additionally, there are two mixed-gender baths and a women-only open-air bath, providing an exceptional onsen experience amidst the sounds and scents of nature. The cuisine, boasting the use of seasonal local ingredients, is also a highlight.