Nationwide × Accommodation With Cave Bath And Cave SpotsRecommended Hotel·Ryokan for family trips

Noto Hyakurakusou invites you to unwind in its “five private baths,” featuring a hand-dug “cave bath” 30 meters underground, an “observation bath” overlooking the ever-changing scenery of Kujuku Bay, and a 100㎡ reservable bath complete with a 120 cm-deep standing bath and sauna. Enjoy the soothing benefits of Noto deep-sea water for deep relaxation of both body and mind. All guest rooms offer breathtaking views of Kujuku Bay, with luxurious accommodations including nine suites. Guests can also enjoy the “Game Lounge” with darts, billiards, and table tennis, as well as an exclusive lounge for suite guests. All guests are served in private dining rooms, where you can savor mountain and sea delicacies nurtured by Noto’s rich natural surroundings.

Nestled in Izu’s abundant nature, Ochiairo has been cherished by many renowned writers and cultural figures since the Meiji era. An open-air bath overlooking the ever-changing mountains and the gentle murmur of the Kano River, an atmospheric cave bath, and serene indoor baths offer guests the ultimate relaxation. In two distinct saunas—both recipients of a Sauna Schwitz award—enjoy a one-of-a-kind “totonoi” experience with outdoor cooling as you feel the breeze of Izu. Savor seasonal cuisine made with generous use of local ingredients blessed by Izu’s rich land and sea, and enjoy the changing seasons through taste as well. Spend unhurried moments in our lounge warmed by the flicker of the fireplace, or relax in your Room as your mind unwinds. Help yourself freely to local Shizuoka craft beer, carefully selected wines, and thoughtfully chosen snacks to your heart’s content. Timeless beauty preserved in cultural heritage meets refined modern hospitality to welcome every guest. Experience a stay found only at Ochiairo—one that sets both body and mind free.

Makusuiso Toikan has been welcoming guests for 140 years in Toi Onsen, home to the oldest renowned hot spring in West Izu. Since our founding, our unwavering belief has been to provide heartfelt hospitality that values the human spirit above all else. We strive to create an Accommodation where every guest can experience the relaxation they seek through travel—filled with enjoyment, joy, and delightful surprises—satisfying all five senses.In addition, we launched our all-inclusive service on April 13, 2026. From free drinks at dinner to beverages and sweets in the lounge, a selection of amenities and yukata of your choice, karaoke, and private open-air baths, we offer a range of services designed to enrich every moment of your stay.

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.

Ubarakan is an Accommodation where you can savor fresh seafood. Seafood delivered directly from the fishing port right in front of us is among the best in Boso in both quality and quantity. Our natural Onsen, enjoyed in four types of baths (Tunnel Bath, Cave Bath, Scenic View Bath, and Private Family Bath), is also highly praised. Surrounded by the beautiful, unspoiled scenery of Ubara Risokyo, our Accommodation offers Rooms with sweeping views of the Pacific Ocean and Ubara Risokyo. Forget the bustle of everyday life and enjoy time that flows at a leisurely pace.

A Resort Hotel where you can feel close to nature, surrounded by azure seas and lush green mountains. Enjoy a variety of Onsen, including the spectacular cave Onsen "Bokido" with views of the rough Kuroshio waves and Onsen overlooking the town from the mountains, which cannot be fully explored in a single day.

At an Onsen located on a scenic hilltop, you can enjoy meals prepared with seasonal ingredients. Conveniently situated between Sapporo and Asahikawa, it serves as an ideal stopover for sightseeing. The facility features two open-air baths: a cave open-air bath illuminated in blue at night and a rock open-air bath with a high, open ceiling. Both allow you to soak in the clear hilltop air. During the day, sunlight streams into the cave, letting you enjoy the tranquility and warmth of the Onsen. Bathing under the starry night sky is also highly recommended.

In a place where you can witness the most beautiful moon in Japan, we envisioned creating a hidden retreat, and that dream led us to the serene forest of Kurokawa Onsen. "Kurokawa Onsen Gokoro Tsukikouju" is a Property where you can enjoy moonlight bathing in an open-air Onsen, while gazing at the moon shining in the sky. On a vast 4,500-tsubo estate, there are only eight villas. Each Room is uniquely designed and decorated, filled with delightful surprises. With the sound of the wind through the forest and the chirping of birds as your background music, surround yourself with only what you love and what is delicious, and indulge in the comfort of letting time flow naturally. This is a Property that promises such luxurious moments for adults.

“Sawando” means “a place where rivers meet.” In December 1998, Onsen water was brought to this area—long used as a gateway to Kamikochi—and Sawando Onsen was born. Our inn opened five years later, in July 2003. Surrounded by mountains and little else, Keiryuso Shiorie warmly welcomes you. We hope you will enjoy the nature, unwind from everyday fatigue, celebrate an anniversary with someone special, or treat yourself for all your hard work—we would be truly happy if you choose Shiorie for moments like these.

A hidden retreat for adults situated on a high plateau overlooking Aso. Enjoy 10 types of onsen, including a mixed-gender open-air bath at an altitude of approximately 800m and a cave bath. The cuisine, featuring steamed dishes using onsen steam and fresh seafood directly from Amakusa, is exquisite. Spend a moment forgetting the hustle and bustle of the city.

A secluded Accommodation in a mountain hamlet on the Niigata prefectural border, surrounded by peaks. Enjoy 100% natural hot spring water from the source of Ogawa Onsen, renowned for 400 years, and five distinctive baths to explore. Recommended for travelers seeking a quiet retreat to savor a hidden hot spring experience.

Since its founding in 1932, the antique-like Japanese Accommodation “Ryokan Ohashi” has stood unchanged. Each guest room features a one-of-a-kind design, and the natural Onsen that springs up from underground vividly conveys the passage of time. Please relax and enjoy your stay at ease.

Katsuura is the top town in Japan for fresh tuna catches. Enjoy the exquisite cuisine at Manseiro, featuring fresh ingredients such as tuna, Kumano beef, whale, spiny lobster, and abalone. You can also enjoy the Onsen at our sister facility, "Hotel Urashima."

Close to Tenryu Gorge, this secluded mountain Property offers a picturesque landscape reminiscent of a traditional Japanese folktale. Indulge in the luxury of enjoying the four seasons in tranquility, with 24-hour access to Fudo Onsen, including an open-air bath where you can gaze at the starry sky, and a cave bath crafted with massive rocks. Relish the Onsen experience to your heart's content. For dining, savor kaiseki cuisine made with ingredients unique to the nature-rich Chiyo mountain village. Enjoy specialties such as shabu-shabu featuring the rare and locally raised "Chiyo Phantom Pork," and stone-grilled "Shinshu Beef," raised on apples. Irori-style cooking, where seasonal ingredients are skewered and grilled over an open hearth, is also highly popular!

Located right in front of Takezaki Fishing Port, all rooms offer a stunning port view! Enjoy exquisite crab dishes prepared by a former fisherman and relax in our historic "Rock Cave Bath," crafted from natural rock formations, highly praised by our guests. Experience a tranquil and soothing stay at our small, family-run inn.

A Property featuring the charm of the "Rock Cave Bath" carved out of a rocky mountain and the "Starry Sky Bath" where you can gaze at the stars. Combining the casual comfort of a Ryokan with the convenience of a Hotel, you can enjoy relaxation in the indoor bath made with Izu stone or the popular private Onsen. The special rooms are in a modern Japanese style, equipped with a sofa and two twin beds. Dinner offers creative Japanese kaiseki cuisine, Western-style dishes, and desserts, all themed around delicious and healthy dining. Breakfast is a Japanese-Western buffet, showcasing beautiful dishes made with seasonal local specialties. The Property also features a relaxation space, tea lounge, table tennis, and a kids' area.