Enjoy 18 types of private open-air hot spring baths with 100% free-flowing natural spring water.

[Gunma • Minakami Onsen] A secluded hot-spring Accommodation nestled in the mountains at an elevation of 800 m. Enjoy 18 distinct private open-air baths, all fed directly from the source, no Reservation required, and free to use throughout your stay. Fresh greenery in spring, deep summer greens with fireflies, vivid autumn foliage, and serene winter snowscapes. After touring the baths while taking in breathtaking seasonal views, savor seasonal mountain cuisine in a private dining room. In a truly private setting, couples, spouses, and families with children can relax and enjoy their time without concern.

  • If you love Onsen, this place is truly heaven—there are 18 private baths.This was my third stay, and I still haven’t managed to try them all.The detached cottage “Aoi” has its own open-air bath, which is absolutely wonderful. I always end up completely satisfied just using the bath in the Room.The spring quality is a simple Onsen (slightly alkaline, hypotonic, high-temperature) with a pH of 8.3.It feels gentle on the skin and is easy to enjoy in a different way from more distinctive springs like sulfur Onsen. It’s comfortable for longer soaks, and being able to enjoy it many times during your stay is part of the appeal.Many of the open-air baths have a rustic, DIY-like feel.Numerous private baths are scattered across the vast grounds, and I can only imagine how much work it must be to maintain and manage so many.Because this Accommodation is surrounded by nature, things like insects and fallen leaves are somewhat unavoidable.In July there were quite a few insects, and when I visited last September I also had trouble with biting gnats.Even so, this Accommodation has more than enough charm to make up for it.The source spring has an abundant flow rate, and the source temperature is very high at 76.1°C.To bring it down to a comfortable temperature, adding water may sometimes be necessary.As an Onsen lover, I’d ideally like to enjoy pure free-flowing water without dilution—but with such a high-temperature source spring, I understand that temperature control can be challenging.Many of the staff are from overseas, but everyone speaks Japanese well and I’ve never felt inconvenienced. They are always polite and attentive.And despite being such a secluded hot-spring retreat, it’s great that the meals are genuinely delicious as well.This time we ordered sukiyaki as an extra dish; it was excellent and very satisfying.In winter this area apparently gets extremely heavy snowfall.Next time I’d love to visit in winter and enjoy an outdoor bath while admiring snowy scenery.

    Arcticarcher 8/18/2026
  • There are many cats on the property, and some of them will let you pet them, which is incredibly soothing. On the other hand, if you’re not comfortable around cats, it might be a bit tough. At night, when I went to the “Star” bath, a kitty had snuck in and was curled up in a changing basket (lol).Many of the staff are from overseas, but everyone’s attentiveness was truly outstanding—from guiding us to our Room to serving meals—so I never felt uneasy during my stay.Most importantly, the Onsen was fantastic: we were able to reserve several large baths for private use, and it was a lot of fun.If there’s one thing to note, since it’s surrounded by nature, you may see some insects. I was also worried about mobile reception, but Rakuten Mobile and au worked without any issues.I’d love to visit again when the weather is cooler.

    R141 7/28/2026

Facilities and Services

See All
  • Hot spring
  • Room with Open-Air Bath
Open-air bath / Free-flowing hot spring / Private bath / Sauna / Room service
IN15:00~18:00
OUT11:00
Number of rooms22 rooms
PetNot allowed
Your childPermitted

[No Meals Included] Late check-in OK until 6:00 PM! Enjoy 18 types of private open-air baths with free-flowing hot spring water.

IN 15:00~18:00
OUT 10:00
¥20,580~
No meals ; 2 peopleTax included¥18,111〜
(USD 114.66)

[No Meals Included] Late check-in OK until 6:00 PM! Enjoy 18 types of private open-air baths with free-flowing hot spring water.

IN 15:00~18:00
OUT 10:00
¥21,630~
No meals ; 2 peopleTax included¥19,035〜
(USD 120.51)

[1 Night with Breakfast] Late Check-in OK Until 6:00 PM! Enjoy 18 Types of Private Open-Air Baths with Free-Flowing Hot Spring Water and a Traditional Japanese Set Meal at Our Onsen Accommodation

IN 15:00~18:00
OUT 10:00
¥25,830~
Breakfast included ; 2 peopleTax included¥22,731〜
(USD 143.90)

[No Meals Included] Late check-in OK until 6:00 PM! Enjoy 18 types of private open-air baths with free-flowing hot spring water.

IN 15:00~18:00
OUT 10:00
¥22,680~
No meals ; 2 peopleTax included¥19,959〜
(USD 126.36)

[1 Night with Breakfast] Late Check-in OK Until 6:00 PM! Enjoy 18 Types of Private Open-Air Baths with Free-Flowing Hot Spring Water and a Traditional Japanese Set Meal at Our Onsen Accommodation

IN 15:00~18:00
OUT 10:00
¥26,880~
Breakfast included ; 2 peopleTax included¥23,655〜
(USD 149.75)

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Introduction of the Accommodation

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Indulge in a hot spring-hopping getaway in the hidden gem of Minakami, Gunma.
Free private rental 24/7 at no charge, with no time limit.

Ryudo is a secluded retreat nestled in the mountains of Minakami, Gunma, at an elevation of 800 meters. Surrounded by nature, guests can enjoy an Onsen tour of 18 rustic open-air baths. Thanks to our abundant hot spring water, every open-air bath on the property is supplied with 100% natural hot spring water directly from the source (free-flowing), and all baths are available free of charge for private use 24 hours a day with no time limit. We also offer day-use Onsen access that includes all private open-air baths, ideal for those short on time. Located about three hours from Tokyo Station, it’s perfect for a day-trip drive from the greater Kanto area. Come and experience this hidden gem in Minakami, Gunma—open-air baths in the heart of nature. We look forward to welcoming you.

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Tour 18 hidden hot springs—all open-air baths are available for private use.

All open-air baths are available free of charge for private use 24 hours a day, with no time limit—so you can relax and enjoy hot spring hopping to your heart’s content without worrying about anything else. With as many as 18 unique open-air baths, you can fully indulge in a true hidden hot spring experience. Options include riverside open-air baths where you can soak while gazing at the stream up close, as well as large open-air baths that can accommodate more than 20 guests at once. At night, unwind while looking up at the moon and stars; in the morning, soak to the sound of birdsong and breathe in the crisp mountain air. The scenery and atmosphere change depending on the time of day. Enjoy the luxury of bathing whenever you like, for as long as you like, without concern for others. Savor your own perfect hidden hot spring journey to your heart’s content.

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Hot Spring Stamp Rally!!

A stamp station is available at each open-air bath. Guests who collect stamps from all 18 locations will receive a commemorative gift. Please give it a try.

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Room

Surrounded by mountains and a river, our property welcomes you with a total of 22 Rooms in a natural setting. In our riverside Rooms, relax as you listen to the gentle flow of the river through your window. In our mountain-side Rooms, enjoy the ever-changing scenery of nature throughout all four seasons. From time to time, you may even spot Japanese serow (a designated Natural Monument) or wild monkeys—an experience unique to staying in the mountains.

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Meals

Deep in Minakami, in Okutone, you’ll find an abundance of natural blessings from the mountains and rivers, including seasonal fresh vegetables harvested from the mountains that very day. We carefully select the finest ingredients from the mountains and rivers throughout all four seasons, present them to suit each season, and deliver exceptional dishes with meticulous attention to safety. Our salt-grilled char is especially popular. Please relax and enjoy your meal at your own private dining room.

Facilities and Equipment of Accommodation

  • The room
    The room
  • Hot Springs & Baths
    Hot Springs & Baths
  • Facilities & Services
    Facilities & Services
  • Meal
    Meal

Basic Information

TaxesA Hot Spring Tax of JPY 150 per adult will be charged separately.
Card information
VISA / MASTER / JCB / AMEX / DINERS / Debit card
Pets
Not allowed
BreakfastThere is no information about breakfast.
Your child
You can stay.
Room service
Available for use
Beverage service is available until 22:00.
Common amenities
  • ○ Shampoo · conditioner
  • ○ Body soap · soap
  • ○ Face towel
  • ○ Bath towel
  • × Body towel · sponge
  • ○ Toothbrush set
  • ○ Comb · Brush
  • × Shower cap
  • ○ Hair dryer
  • ○ Shaving
  • × Shaving Gel/Foam
  • × Bath additives
  • ○ Yukata
  • × Pajamas
  • × 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
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
Open-air bath
The number of Open-air bath
18
Business Hours
00:00~00:00
Hot spring
Available
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring
Remarks
18 types of open-air baths and four indoor baths are available 24 hours a day.
Private bath
The number of Private bath
18
Business Hours
00:00~00:00
Hot spring
None
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring
Remarks
Room with Open-Air Bath
Hot spring
Available
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring
Remarks
Spring quality and benefits

Mildly alkaline simple hot spring

Fatigue recovery, gastrointestinal issues, neuralgia, sensitivity to cold, and skin-beautifying benefits

※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.

SaunaAvailable
Hot stone spaNone
About Hygiene Measures
Thank you very much for your continued patronage. To help prevent the spread of COVID-19, we have implemented the following measures and kindly ask for our guests’ cooperation. 【At Check-in】 ・Alcohol hand sanitizing at the front desk ・Temperature checks for all guests ・Alcohol sanitizing by staff before each guest interaction 【Inside the Property】 ・Alcohol sanitizer available at the entrance and dining area ・Ventilation in areas where crowding may occur 【After Check-in】 ・Unless necessary, we will not visit your Room and will provide guidance via internal phone calls ・Futon bedding service has been suspended and changed to self-service 【Dining Area】 ・Alcohol hand sanitizing before entering private dining rooms ・Reduced frequency of meal service to minimize contact opportunities ・Thorough disinfection of kitchens, tableware, and related items 【At Check-out】 ・Alcohol sanitizing after each guest interaction (including disinfection of Room keys) ・Cashless payment is recommended 【Room Cleaning】 ・Thorough ventilation ・Final wipe-down with a sodium hypochlorite solution 【Staff Health Management】 ・Thorough handwashing and gargling ・Health checks and condition management (including temperature checks before coming to work) ・Mandatory mask-wearing while serving guests *We will continue to make improvements to further enhance the safety and peace of mind of both our guests and staff.*

Reviews

Overall Score
4.22
Good (33)
  • Rooms & Amenities
    3.76
  • Facility
    3.91
  • Hospitality & Service
    4.30
  • Meals
    4.27
  • Onsen & Bath
    4.70
  • Satisfaction
    4.36

*Reviews that have been translated from Japanese.*

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

Access Information

Address
Gunma Prefecture6192 Fujiwara, Minakami-machi, Tone-gun
TEL:+81-278-75-2086

JR: Take the bus bound for Yunokoya Onsen from Minakami Station (40 minutes). Get off at the last stop (Yunokoya) and walk 2 minutes.

Parking Information
Fee
Free for guests
Parking time
---
Parking space
No restrictions
Number of parking spaces
26 cars available Indoor & Outdoor
Valet service
Unavailable

Pickup and drop-off information
Unavailable

Frequently Asked Questions

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