• I love Onsen and have stayed at many Accommodations across the whole country, including luxury Ryokan, but Koguriyama Sanso stands out for its deeply satisfying meals, the best Onsen where you can always soak in peace and relaxation, the wonderful view from the window, and the quiet, luxurious time surrounded by nature—along with the hostess’s bright and welcoming personality. It is a memorable place I want to visit again even if it’s far away. Whether you’re traveling solo, with family, or in a group, I highly recommend this Accommodation for warmly welcoming everyone.

    Yahoo!トラベルユー... 9/7/2026
  • We stayed here as a base for a ski trip to Naeba, Suhara, and Kagura. Since we chose an expressway discount plan with a lift-ticket set for touring multiple resorts, we didn’t worry about the distance to the nearest interchange. We narrowed down options across several areas and booked based on this priority: a high-quality Onsen available anytime > location (quiet and tucked away) > price. The Onsen is pleasantly lukewarm with soft water quality—I’ve lost count of how many times I soaked. It feels like being wrapped in a futon, and it’s so relaxing that once I soaked absentmindedly without even turning on the bath lights before evening… and before I knew it, it was midnight. Unlike circulated baths that make you sweat heavily in 5–10 minutes, this one is different: no matter how many times I bathed, my skin never felt dry. On the guestroom floor there is a microwave, vending machines for soft drinks, alcohol, and snacks, plus a jug of local spring water. It seemed like soft water and tasted great—I refilled it many times. I’ll stop here—if I praise it too much, I might not be able to get a Reservation next season. Thank you for a wonderful trip.

    Yahoo!トラベルユー... 3/11/2026

Facilities and Services

See All
  • Hot spring
  • Pet-friendly
Free-flowing hot spring / Large public bath / Free shuttle service
IN15:00~21:00
OUT10:00
Number of rooms10 rooms
PetPermitted
Your childPermitted
Japanese-style room with 6 tatami mats
  • Japanese-style Room
  • Capacity 1~2 people

[No Meals Included] Relax and recharge in our free-flowing natural hot spring Onsen—ideal for sightseeing or business trips!

IN 15:00~21:00
OUT 10:00
¥11,500~
No meals ; 2 peopleTax included¥10,350〜
(USD 65.57)

* [No Meals Included] Unwind and recharge in our free-flowing natural Onsen, ideal for sightseeing or business trips!

IN 15:00~21:00
OUT 10:00
¥11,500~
No meals ; 2 peopleTax included¥10,350〜
(USD 65.57)

[Pet-Friendly Room Only] Relax with your pet in a forest lodge and enjoy a touch of luxury with natural Onsen!

IN 15:00~21:00
OUT 10:00
¥11,500~
No meals ; 2 peopleTax included¥10,350〜
(USD 65.57)

* [Pet-Friendly Room Only] Relax with your pet in a forest lodge and enjoy a touch of luxury with natural Onsen!

IN 15:00~21:00
OUT 10:00
¥11,500~
No meals ; 2 peopleTax included¥10,350〜
(USD 65.57)
Japanese-style room with 8 tatami mats
  • Japanese-style Room
  • Capacity 1~3 people

[No Meals Included] Relax and recharge in our free-flowing natural hot spring Onsen—ideal for sightseeing or business trips!

IN 15:00~21:00
OUT 10:00
¥12,500~
No meals ; 2 peopleTax included¥11,250〜
(USD 71.28)

* [No Meals Included] Unwind and recharge in our free-flowing natural Onsen, ideal for sightseeing or business trips!

IN 15:00~21:00
OUT 10:00
¥12,500~
No meals ; 2 peopleTax included¥11,250〜
(USD 71.28)

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Introduction of the Accommodation

Basic Information

Card information
VISA / MASTER / JCB / AMEX / DINERS
Pets
Permitted
- Only small dogs (under 10kg) are allowed. - One dog per Room is permitted. - A fee of 2,200 yen is charged per dog. - Dogs are only allowed inside the Room and must wear a diaper. In case of any accidents, guests are requested to restore the original condition. - Please bring necessary items (dog food, etc.) yourself.
BreakfastThere is no information about breakfast.
Your child
You can stay.
Room service
Not available
Common amenities
  • ○ Shampoo · conditioner
  • ○ Body soap · soap
  • ○ Towel · Bath towel
  • × Body towel · sponge
  • ○ Toothbrush set
  • × Comb · Brush
  • × Shower cap
  • ○ Hair dryer
  • × Shaving
  • × Shaving Gel/Foam
  • × Bath additives
  • × Yukata
  • × Nightwear
  • × Bathrobe
  • × Slippers
  • × facial cleanser
  • × Toner
  • × Lotion
  • × Makeup remover
  • ○ Cotton swab
  • × Cotton
  • × Clothing deodorizing spray
  • ○ Refrigerator
  • × Minibar
  • ○ Electric kettle
  • ○ Tea set (free)
  • ○ Television
  • × Safe
  • × Scale
  • × Trouser press
  • × Free morning edition
  • × Pay-per-view broadcast
  • × Satellite broadcasting
  • × Video on Demand
  • × Radio
  • × CD player
  • × DVD player
  • × Blu-ray player
  • × Speakers for portable audio
  • × In-room PCs and tablets
Facilities and Features
  • ○ Hot spring
  • × Rooms with open-air baths available
  • × Open-air bath
  • ○ Free-flowing hot spring
  • ○ Large public bath
  • × Private bath
  • × Sauna
  • × Ganbanyoku (rock bathing)
  • × Within a 5-minute walk from the station
  • × Within a 5-minute walk to the convenience store.
  • × Indoor pool
  • × Outdoor pool
  • ○ Pet-friendly
  • × Spa facility
  • × Fitness
  • ○ Free shuttle service
  • × Shuttle Service (Paid)
  • × Room service
  • × Room Service Available 24 Hours
  • × Barrier-free
  • × Childcare services
Esthetic Massage
None
Fitness gym
None
Public Bath
The number of Public Bath
2
Business Hours
15:00~10:00
Hot spring
Available
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring
Remarks
During the off-peak season, exclusive Room rentals are available; please let us know if you are interested.
Spring quality and benefits

Sodium chloride Onsen (hypotonic, mildly alkaline, high-temperature) PH7.7

- Rheumatoid arthritis - Deformative joint pain - Back pain - Neuralgia - Frozen shoulder - Bruises - Sprains - Cold sensitivity - Other skin conditions ※ Chlorine-free, especially recommended for those with sensitive skin.

※Regarding the notation of "Gensen Kakenagashi"
In some facilities, heating or adding water for temperature adjustment may be performed. Additionally, please note that in some parts of the facility, the hot spring water may not be free-flowing from the source. For more details, please contact each facility.

SaunaNone
Hot stone spaNone
OthersOther accepted cards: UC/DC

Reviews

Overall Score
4.42
Good (10)
  • Rooms & Amenities
    4.40
  • Facility
    4.30
  • Hospitality & Service
    4.50
  • Meals
    4.40
  • Onsen & Bath
    4.50
  • Satisfaction
    4.40

*Reviews that have been translated from Japanese.*

*Showing only reviews from 一休.com (Japanese) and Yahoo!トラベル.*

Access Information

Address
Niigata PrefectureNam Uonuma-shi, Oguriyama 2910-120
TEL:+81-25-786-4170

・8 minutes by car from Muikamachi IC on the Kanetsu Expressway
・10 minutes by car from Muikamachi Station on the Joetsu Line

Parking Information
Fee
Free for guests
Parking time
---
Parking space
No restrictions
Number of parking spaces
10 cars available Indoor & Outdoor
Valet service
Unavailable
First-come, first-served

・Please inform us of the car model, width, and length.
・There is a garage available, but the number of spaces is limited. Please make a Reservation if you wish to use it.

※Due to the limited number of cars that can fit in the garage, please carpool if possible.

Pickup and drop-off information
Available (Free)・If you require Shuttle Service, please contact us in advance.
 Please come to Muikamachi Station on the Joetsu Line, and we will pick you up at Muikamachi Station.
※ The maximum number of people is up to 3 adults.
※ The pick-up time is until 18:00.

Frequently Asked Questions

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