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- Hoshi Onsen Chojukan
A hidden hot spring Property registered as a tangible cultural heritage, where you can enjoy natural hot spring water at your feet.
A secluded hot spring property located within Jōshin'etsu Kōgen National Park. Famous for its Rokumeikan-style grand bath "Hōshi no Yu," reminiscent of the Meiji era.
This Accommodation offers heartfelt hospitality throughout—and you even get to stay in a rare, registered cultural property building. As you step through the entrance, you’re welcomed by a traditional architectural space with a high-ceilinged hall and the gentle smolder of firewood in the irori hearth. The cuisine is prepared with great care, with no shortcuts. There are three Onsen baths, with fresh spring water welling up directly into them, and separate time slots for men and women so you can relax at your own pace. We chose a Plan without an in-room toilet or bath, but it was a wonderful Room filled with the soothing sound of the river. Thank you very much.
me-kikuyan 7/30/2026The Onsen and the Room atmosphere were excellent, and the service was great.After check-in, there isn’t much to do besides taking a walk around the Accommodation and the surrounding area, but we were able to slowly enjoy an extraordinary getaway with just the Onsen, the Room, and the meals.It’s an Onsen I’d definitely like to visit again.Next time, I plan to check in early and spend a luxurious time relaxing with a book.
ゆんぼ 5/5/2026
Facilities and Services
See All- Hot spring
| IN | 15:00~19:00 |
|---|---|
| OUT | 10:30 |
| Number of rooms | 33 rooms |
| Pet | Not allowed |
| Your child | Not allowed |
Photo
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Introduction of the Accommodation

Guest room
The guest room building, designated as a "National Registered Tangible Cultural Property," including wooden structures built during the Showa era, retains its original charm and has been cherished by various cultural figures.

Onsen
We offer "Hoshi no Yu," a grand bathhouse with over a century of history, "Tamaki no Yu," crafted entirely from hinoki wood with an open and spacious design, and "Chouju no Yu," a women-only bath quietly situated near the river's edge.

We use carefully selected ingredients from Gunma Prefecture and offer a menu that changes with the seasons.

You can observe traditional mountain lifestyles featuring hearths and braziers.
Facilities and Equipment of Accommodation
- The room
- Hot Springs & Baths
- Facilities & Services
- Meal
Basic Information
| Card information | VISA / JCB / AMEX |
|---|---|
| Pets | Not allowed |
| Breakfast | Breakfast Room Hall |
| Your child | You cannot stay. |
| Room service | Not available |
| Common amenities |
|
| Facilities and Features |
|
| Esthetic Massage | None |
| Fitness gym | None |
| Public Bath |
|
| Open-air bath |
|
| Spring quality and benefits | Simple Onsen, Calcium-Sodium Sulfate Onsen. Frozen shoulder, cold sensitivity, rheumatism, neurological disorders |
| Sauna | None |
| Hot stone spa | None |
| Others | 【Other available cards】Nicos |
| About Hygiene Measures | [Request to Guests]
We kindly ask that you review the COVID-19 prevention guidelines for your respective prefecture and decide on a safe time to visit us.
If you are experiencing any of the following symptoms, we kindly request that you postpone your visit until you are feeling well:
- Cold-like symptoms observed from a few days prior to the day of your visit
- Shortness of breath, severe fatigue, cough, or fever
- Significant abnormalities in your sense of taste
Even if you are feeling well, we ask that elderly guests, those with underlying health conditions, pregnant individuals, or those accompanying preschool-aged children make careful decisions based on information from relevant authorities.
At check-in, we will ask about your health condition and conduct a temperature check.
We also request that you wear a mask in public spaces as much as possible.
[Our Measures]
- Daily health checks and temperature monitoring for staff
- Regular ventilation
- Mask-wearing by staff
- Installation of acrylic panels at the front desk
- Regular alcohol disinfection
- Placement of disinfectant sprays in public spaces
- Disinfection of kitchen and tableware
- Operation of nano diffusers
- Operation of ozone fumigation-type deodorization equipment
- Continuous research and efforts to enhance safety
We are fully prepared to ensure that you can stay at our Property with peace of mind, and we look forward to welcoming you with a smile. |
Reviews
- Rooms & Amenities4.07
- Facility4.17
- Hospitality & Service4.16
- Meals3.96
- Onsen & Bath4.74
- Satisfaction4.29
*Reviews that have been translated from Japanese.*
*Showing only reviews from 一休.com (Japanese) and Yahoo!トラベル.*
Access Information
Gunma Prefecture650 Nagai, Minakami-machi, Tone-gun
TEL:+81-278-66-0005
JR: Joetsu Shinkansen Jomo Kogen Station → Bus to Sarugakyo approximately 40 minutes, alight at Sarugakyo → Bus to Hoshi Onsen approximately 15 minutes, alight at Hoshi Onsen → Walk approximately 1 minute
- 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
- Unavailable
Frequently Asked Questions
Please provide information about Open-air bath.
・Hot spring: Available ・Free-flowing: None ・Cloudy hot spring water: None
What are the qualities and benefits of the hot spring water?
The spring quality and efficacy of the hot spring are as follows. ・Spring quality: Simple Onsen, Calcium-Sodium Sulfate Onsen. ・Spring efficacy: Frozen shoulder, cold sensitivity, rheumatism, neurological disorders
What kind of facilities and features are available?
There are the following facilities and features. Hot spring・Open-air bath・Large public bath
I would like to know the access information.
JR: Joetsu Shinkansen Jomo Kogen Station → Bus to Sarugakyo approximately 40 minutes, alight at Sarugakyo → Bus to Hoshi Onsen approximately 15 minutes, alight at Hoshi Onsen → Walk approximately 1 minute
Is parking available?
・Fee: Free for guests ・Parking space: Length --- Vehicle width --- Vehicle height --- ・Number of parking spaces: 30 cars ・Valet Service: Unavailable First-come, first-served
What kind of hygiene management is being conducted?
[Request to Guests] We kindly ask that you review the COVID-19 prevention guidelines for your respective prefecture and decide on a safe time to visit us. If you are experiencing any of the following symptoms, we kindly request that you postpone your visit until you are feeling well: - Cold-like symptoms observed from a few days prior to the day of your visit - Shortness of breath, severe fatigue, cough, or fever - Significant abnormalities in your sense of taste Even if you are feeling well, we ask that elderly guests, those with underlying health conditions, pregnant individuals, or those accompanying preschool-aged children make careful decisions based on information from relevant authorities. At check-in, we will ask about your health condition and conduct a temperature check. We also request that you wear a mask in public spaces as much as possible. [Our Measures] - Daily health checks and temperature monitoring for staff - Regular ventilation - Mask-wearing by staff - Installation of acrylic panels at the front desk - Regular alcohol disinfection - Placement of disinfectant sprays in public spaces - Disinfection of kitchen and tableware - Operation of nano diffusers - Operation of ozone fumigation-type deodorization equipment - Continuous research and efforts to enhance safety We are fully prepared to ensure that you can stay at our Property with peace of mind, and we look forward to welcoming you with a smile.
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