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Tengu Onsen Asama Sanso
Nagano Prefecture/Komoro CityA serene Onsen accommodation with Japan's reddest hot spring waters, nestled in the embrace of nature. Indulge in a luxurious moment of tranquility at the foot of Mount Asama.
Escape the hustle and bustle of the city and rejuvenate your mind and body. Enjoy a secluded hot spring with natural flowing water and immerse yourself in breathtaking nature. We offer exclusive experiences such as private villa stays, local cuisine, mushroom foraging, horseback riding, and more—only available here.
Reviews
Facilities and Services
See All- Hot spring
- Pet-friendly
| IN | 14:30~21:00 |
|---|---|
| OUT | 10:00 |
| Number of rooms | 10 rooms |
| Pet | Permitted |
| Your child | Permitted |
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Introduction of the Accommodation





"Tengu Onsen," springing from deep beneath Mount Asama, is a rare reddish-brown iron-rich hot spring found in only a few places across the whole country. The water changes color upon exposure to air, offering a visually striking experience. It gently warms your body to the core, resists cooling down quickly, and provides thorough relaxation for tired bodies after hiking or other activities. With its soft texture on the skin, it offers a soothing sensation that melts away stress. Enjoy an authentic Onsen experience that truly embodies the "blessings of the mountains."





Welcome to the trailhead of Mount Asama. Right next to Asama Sanso, the majestic Mount Asama rises before you. At Asama Sanso, nestled at the foot of the mountain, you can enjoy breathtaking views that change with each season—fresh greenery in spring, cool breezes in summer, vibrant autumn foliage, and a snow-covered landscape in winter. The mountain ridges visible from your room window resemble a beautiful painting. Experience a serene space where time flows gently. Escape from everyday life and immerse yourself in nature—this is the kind of stay that awaits you here.

We offer handmade soba noodles made with natural water from Mount Asama, freshly harvested vegetables from contracted farmers, and a variety of seasonal ingredients such as wild plants and mushrooms sourced locally. Each dish is crafted with care, delivering a simple yet nostalgic flavor that gently touches the heart. Dining at our lodge feels like savoring the essence of the mountains themselves. Experience the richness of this land in harmony with nature through all your senses.

Enjoy unique activities such as horseback riding, BBQ, soba making, wild vegetable picking, and mushroom hunting. These experiences are highly popular among outdoor enthusiasts and families with children alike. With various accommodation styles including trailer houses, cottages, and campsites, your stay itself becomes an adventure. Spending time surrounded by nature will surely create unforgettable memories beyond the ordinary. Come and enjoy an active mountain getaway that’s perfect for families and groups!

A Relaxing Trip with Your Beloved Family - Stay with Your Pets
"Because pets are an important part of the family, you want to travel together." Tengu Onsen Asama Sanso offers a pet-friendly accommodation style to meet that desire. In certain rooms, such as trailer houses, you can stay with your beloved dog. Take a walk together in the forest or enjoy the fresh air side by side. Create special moments that deepen your bond with your dog in a unique and tranquil setting. Experience a heartwarming journey surrounded by nature and kindness. Enjoy quality time with your family and beloved pet at your own pace.
Facilities and Equipment of Accommodation
- The room
- Restaurant
Basic Information
| Taxes | The Hot Spring Tax must be paid separately on-site. |
|---|---|
| Card information | JCB |
| Pets | Permitted Dogs, an important part of your family, are welcome to stay in our trailer house.
Fee: Small/medium-sized dogs - 2,200 yen
For large dogs, please contact us for consultation.
Pet Amenities:
- Pet sheets
- Adhesive cleaner |
| Breakfast | There is no information about breakfast. |
| Your child | You can stay. |
| Room service | Not available |
| Common amenities |
|
| Facilities and Features |
|
| Esthetic Massage | None |
| Fitness gym | None |
| Public Bath |
|
| Spring quality and benefits | Simple Iron Cold Mineral Spring Rheumatism, neuralgia, muscle pain, etc. ※Regarding the notation of "Gensen Kakenagashi" |
| Sauna | None |
| Hot stone spa | None |
| Others | Other accepted cards: DC Free rental: Shogi, Mahjong, Go |
Reviews
The overall facility score is not displayed because the required number of reviews has not been reached.
*Reviews that have been translated from Japanese.*
*Showing only reviews from 一休.com (Japanese) and Yahoo!トラベル.*
Access Information
Nagano PrefectureKomoro City, Ko Mata 4766-2
TEL:+81-267-22-0959
25 minutes by car from Komoro IC on the Joshinetsu Expressway.
40 minutes by car from Karuizawa.
- Parking Information
- Fee
- Free for guests
- Parking time
- ---
- Parking space
- No restrictions
- Number of parking spaces
- 30 cars available outdoor
- Valet service
- Unavailable
- Pickup and drop-off information
- Available (Paid)We provide a shuttle service from Komoro Station to our accommodation. A separate service fee (approximately 10% of the accommodation cost) will be charged for guests using the shuttle service.
Please contact us by phone and consult with us by the day before your use.
Frequently Asked Questions
What kind of facilities and features are available?
There are the following facilities and features. Hot spring・Free-flowing hot spring・Large public bath・Pet-friendly・Shuttle Service (Paid)
I would like to know the access information.
25 minutes by car from Komoro IC on the Joshinetsu Expressway. 40 minutes by car from Karuizawa.
Is parking available?
・Fee: Free for guests ・Parking space: Length --- Vehicle width --- Vehicle height --- ・Number of parking spaces: 30 cars ・Valet Service: Unavailable No Reservation Required
Is an internet connection available?
Connection is possible. ・Wi-Fi is available. For more details, please refer to the room and plan information.














