A tranquil lodge of adventure, hot springs, and cuisine
Located within Bandai-Asahi National Park in Inawashiro, Fukushima, Numajiri Kogen Lodge is a tranquil retreat nestled in the rich natural surroundings at the foot of Mt. Adatara.
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Services & Facilities
With only 12 rooms for up to 24 guests, the lodge keeps a cozy, wooden mountain-lodge feel while offering modern comfort. Rooms do not have TVs or clocks, allowing guests to relax fully. Options include a suite with a semi-open-air bath and a tatami-style twin room where you can go barefoot.
Children under 12 are not allowed, making it perfect for adults seeking a peaceful getaway. Guests often say it’s a serene escape from city life.
The motto for meals at Numajiri Kogen Lodge is “One Dish at a Time.” Dinner features a creative Japanese kaiseki course using carefully selected local ingredients, including seasonal vegetables from Aizu and the Tohoku region, mountain delicacies, branded meats from Fukushima, and fresh seafood from the Sanriku and Joban coasts.
The chef places great importance on relationships with local producers, sourcing vegetables from organic contracted farms and seafood directly from fisherman colleagues. This meticulous attention to detail is reflected in every single dish.
Fukushima is also known for its rich variety of local sake, and the lodge offers an extensive selection that pairs perfectly with the seasonal dishes, allowing guests to enjoy a sake tasting during dinner.
Numajiri Kogen Lodge’s pride is its hot spring, a highly acidic sulfur spring (Numajiri Motoyu) that gushes from near the crater of Mount Adatara at an elevation of 1,250 m. Boasting the largest output of any single spring in Japan, it produces a continuous flow of 13,400 liters per minute. With a pH of 2.1—comparable to lemon juice—its strong acidity stimulates the skin and, with a rich 155.4 mg/L of metasilicic acid, is known to promote metabolism and skin health. The milky white water has a distinctive character, and hot spring enthusiasts describe it as “an extremely strong acid that reminds you of Kusatsu Onsen.”
At Numajiri Kogen Lodge, guests can enjoy this spring in both indoor and outdoor baths, all with direct spring water flow. The open-air bath, surrounded by trees, offers seasonal views of fresh greenery, autumn foliage, and snowy landscapes, along with the refreshing breeze of the highlands. Day-use bathing is also available from 11:00 to 14:30 (except Tuesday–Thursday), allowing non-staying visitors to experience this famous hot spring.
The guest rooms at Numajiri Kogen Lodge are designed in a natural-modern style, wrapped in the warmth of wood, with a variety of room types to suit different needs. Every room features a Simmons bed to support a restful sleep, and with no TV or clock, guests can enjoy a quiet space immersed in nature.
Depending on the season and room type, there are various packages available, such as creative dinners using local ingredients, special plans for anniversaries, or plans that include hot spring trekking experiences.
Since no room has a TV or clock, guests can fully disconnect and enjoy a digital detox. Relax at dusk and wake with the sunrise—experiencing time in harmony with the surrounding natural environment.
Numajiri Kogen Lodge offers a wide range of activities that let guests fully enjoy nature. Adjacent to the lodge is cafe & activity nowhere, where guided trekking and hands-on nature programs are available. Among the most popular is the Extreme Onsen tour. Guests hike to the source of Numajiri Onsen, Numajiri Motoyu, and soak in a natural outdoor hot spring formed by the surrounding environment—a completely unique onsen experience.
This tour is held annually from May to November. There are two departures each day — a morning session (9:00–12:00) and an afternoon session (13:00–16:00). Joining the morning tour allows you to enjoy a more relaxed afternoon after descending the mountain. For the trek, please wear appropriate hiking clothes and non-slip shoes, and bring a swimsuit and towel for bathing afterward.
This service uses a reservation request system. After we check room availability with the accommodation, we will propose the most suitable room and plan for you.Once availability is confirmed, we will send you our proposal via LINE, and your reservation will be finalized upon completion of payment.
Spacious Twin Room “Special Room”
A sofa-equipped room overlooking the Numajiri Highlands
This spacious twin room features a comfortable sofa and large windows on two sides, offering sweeping views of the rich natural scenery of the Numajiri Highlands.
■ Room Size
28.3㎡
■ Facilities
Shower / Sofa / Toilet / Washbasin
■ Amenities
Bath towel, hand towel, toothbrush, comb, cotton swabs, hair dryer, in-room wear
■ Capacity
1–2 guests
Suite Room with Semi-Open-Air Hot Spring Bath
This guest room features a private hot spring bath with natural free-flowing spring water.
By opening the windows, the bath becomes a refreshing semi-open-air onsen where you can enjoy the crisp highland air.
Designed with a split-level layout, the room offers a spacious and relaxing atmosphere.
Room Size: 40.5㎡
Facilities: Semi-open-air bath (with washing area) / Bedroom / Sofa / Toilet / Washbasin
Amenities: Bath towel, Hand towel, Toothbrush, Comb, Cotton swabs, Hair dryer, Room wear
Capacity: 1–2 guests
Spacious Twin Room “Special Room”
A sofa-equipped room overlooking the Numajiri Highlands
This spacious twin room features a comfortable sofa and large windows on two sides, offering sweeping views of the rich natural scenery of the Numajiri Highlands.
■ Room Size
28.3㎡
■ Facilities
Shower / Sofa / Toilet / Washbasin
■ Amenities
Bath towel, hand towel, toothbrush, comb, cotton swabs, hair dryer, in-room wear
■ Capacity
1–2 guests
Suite Room with Semi-Open-Air Hot Spring Bath
This guest room features a private hot spring bath with natural free-flowing spring water.
By opening the windows, the bath becomes a refreshing semi-open-air onsen where you can enjoy the crisp highland air.
Designed with a split-level layout, the room offers a spacious and relaxing atmosphere.
Room Size: 40.5㎡
Facilities: Semi-open-air bath (with washing area) / Bedroom / Sofa / Toilet / Washbasin
Amenities: Bath towel, Hand towel, Toothbrush, Comb, Cotton swabs, Hair dryer, Room wear
Capacity: 1–2 guests
Spacious Twin Room “Special Room”
A sofa-equipped room overlooking the Numajiri Highlands
This spacious twin room features a comfortable sofa and large windows on two sides, offering sweeping views of the rich natural scenery of the Numajiri Highlands.
■ Room Size
28.3㎡
■ Facilities
Shower / Sofa / Toilet / Washbasin
■ Amenities
Bath towel, hand towel, toothbrush, comb, cotton swabs, hair dryer, in-room wear
■ Capacity
1–2 guests
Suite Room with Semi-Open-Air Hot Spring Bath
This guest room features a private hot spring bath with natural free-flowing spring water.
By opening the windows, the bath becomes a refreshing semi-open-air onsen where you can enjoy the crisp highland air.
Designed with a split-level layout, the room offers a spacious and relaxing atmosphere.
Room Size: 40.5㎡
Facilities: Semi-open-air bath (with washing area) / Bedroom / Sofa / Toilet / Washbasin
Amenities: Bath towel, Hand towel, Toothbrush, Comb, Cotton swabs, Hair dryer, Room wear
Capacity: 1–2 guests
2864 Numajiriyama-Ko, Kayu, Inawashiro-machi, Yama-gun, Fukushima 969-2752, Japan
From Tokyo, take the JR Tohoku Shinkansen to Koriyama Station, then transfer to the local line to Inawashiro Station.
From there, it’s about 25 minutes by car.
A complimentary shuttle is available from Inawashiro Station (approx. 25 min).
Advance reservation is required.
Pick-up: timed with the train arriving at 14:52
Drop-off: departs the ryokan at 10:00 only
Ryokan Name
Numajiri Plateau Lodge
Address
2864 Numajiriyama-Ko, Kayu, Inawashiro-machi, Yama-gun, Fukushima 969-2752, Japan
Baths
| Water quality | Acidic sulfur spring |
| Free-flowing hot spring | Directly from the source |
| Opening hours | 15:00–10:00 (Day-use hot spring available on Fri, Sat, Sun, and Mon only) |
Facilities & Features
Common Amenities
