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- Kusatsu Onsen Bouun
Enjoy six free-flowing Onsen baths sourced from two springs in Kusatsu, one of Japan's three famous hot springs.
Kusatsu Onsen Boun is a Ryokan boasting flowing Onsen baths and a rhododendron garden. It features six baths sourced from two hot springs. Enjoy the full experience of Kusatsu Onsen. Rooms with open-air baths using the Nishinokawara spring are also available. Located just a 3-minute walk from Yubatake, the center of the Onsen town. Relax and enjoy the serene time of Onsen indulgence loved by many literary figures.
The entire property was spotlessly clean, which made our stay very comfortable. All the staff were polite and pleasant. Both the first-floor lounge and the third-floor common room had a relaxing atmosphere, so we could unwind not only in our Room but also in other areas. The tasteful floral arrangements that weren’t too showy were also a lovely touch.
れいれいこ 8/5/2026We stayed as a couple for our wedding anniversary. The Room was clean, spacious, well maintained, very quiet, and made for a comfortable stay. It was also close to Yubatake, so we took an after-dinner walk and enjoyed the illuminations. The meals were delicious, with a wide variety of dishes both dinner and breakfast, and we truly felt the heartfelt hospitality. Thank you very much for taking such good care of us.
Cookielover 7/16/2026
Facilities and Services
See All- Hot spring
- Room with Open-Air Bath
| IN | 14:00～18:00 |
|---|---|
| OUT | 10:00 |
| Number of rooms | 38 rooms |
| Pet | Not allowed |
| Your child | Permitted |
Photo
See All
- Japanese-style Room
- Capacity 2~5 people
- Japanese-style Room
- Capacity 2~5 people
- Japanese-style Room
- Capacity 2~5 people
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Introduction of the Accommodation
We use local specialties and seasonal ingredients, prepared with care. Hot dishes are served while hot, and cold dishes are served while cold, divided into 4-5 servings.
At Bouun, we offer six baths, including open-air baths, supplied by two Onsen sources. All are fresh Onsen with continuous flow. Enjoy the Onsen to your heart's content.
Facilities and Equipment of Accommodation
- The room
- Hot Springs & Baths
- Facilities & Services
- Meal
Basic Information
| Taxes | For adults only, a Hot Spring Tax of 150 yen per person will be charged separately. |
|---|---|
| Card information | VISA / MASTER / JCB / AMEX / DINERS / UnionPay / Debit card |
| Pets | Not allowed |
| Breakfast | There is no information about breakfast. |
| Your child | You can stay. The Twin Bed Room at Unmatsuan does not accommodate children. Child Sharing Existing Bedding is available for children up to 5 years old. Children under 2 years old without meals and bedding are free of charge. Please indicate in the comment section during the Reservation if there are children under 2 years old. |
| Room service | Not available |
| Common amenities |
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| Facilities and Features |
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| Esthetic Massage | None |
| Fitness gym | None |
| Public Bath |
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| Open-air bath |
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| Room with Open-Air Bath |
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| Room with Onsen Indoor Bath |
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| Spring quality and benefits | Onsen containing acidic sulfur, aluminum, sulfate, and chloride. In addition to the general benefits of Onsen (neuralgia, muscle pain, joint pain, frozen shoulder, motor paralysis, joint stiffness, bruises, sprains, chronic digestive diseases, hemorrhoids, sensitivity to cold, post-illness recovery, health promotion), it is highly effective for skin diseases, chronic gynecological conditions, diabetes, hypertension, and arteriosclerosis. ※Regarding the notation of "Gensen Kakenagashi" |
| Sauna | None |
| Hot stone spa | None |
| Others | You can send your luggage in advance. |
| About Hygiene Measures | To Our Valued Guests,
Thank you very much for choosing to stay with us.
We sincerely appreciate your visit to our Property.
To ensure the safety and peace of mind of our guests, we have implemented thorough measures against COVID-19. All staff at our Facility are committed to maintaining hygiene within the Property and managing their own health to the highest standards.
We kindly ask for your understanding and cooperation with the following measures.
【Our Initiatives】
1. Alcohol-based hand sanitizers are placed at the entrance of the Ryokan, lobby, dining areas, in front of elevators, and other locations throughout the Property.
2. In addition to regular cleaning of the Property and dining areas, we have enhanced the disinfection and sterilization of frequently touched items such as handrails, doorknobs, Room keys, and other equipment. Rooms are prepared after disinfection using an ozone generator.
3. All staff and business partners are required to maintain strict hygiene management in the back areas. This includes temperature checks upon reporting to work, thorough hand washing and sanitization, and a system to monitor and manage health conditions and actions in case of illness.
4. For the safety of our guests and staff, all employees are required to wear masks.
【Requests to Our Guests】
1. At check-in, we kindly ask you to fill out a health questionnaire and undergo a temperature check (temperature checks are optional).
2. Please sanitize your hands upon entering and leaving the Property.
3. We request that you wear a mask in shared spaces.
4. Dinner and breakfast will be served at staggered times to avoid crowding with other guests.
5. When using the restroom, please close the toilet lid before flushing.
6. During check-out, the front desk may become crowded. We kindly ask that only one person from your party approaches the front desk for payment. We also recommend settling your bill in advance if possible.
7. If you feel unwell during your stay, please inform the nearest staff member immediately. |
Reviews
- Rooms & Amenities4.65
- Facility4.60
- Hospitality & Service4.61
- Meals4.54
- Onsen & Bath4.83
- Satisfaction4.64
*Reviews that have been translated from Japanese.*
*Showing only reviews from 一休.com (Japanese) and Yahoo!トラベル.*
Access Information
Gunma Prefecture433, Kusatsu Town, Agatsuma District
TEL：+81-279-88-3251
Get off at JR Agatsuma Line Naganohara-Kusatsuguchi Station, take a JR bus for 25 minutes to Kusatsu Bus Terminal, then walk 7 minutes (free Shuttle Service available to the bus stop).
- Parking Information
- Fee
- Free for guests
- Parking time
- 14:00～12:00 the next day
- Parking space
- No restrictions
- Number of parking spaces
- 50 cars available outdoor
- Valet service
- Available (Free)
- Pickup and drop-off information
- Available (Free)【For those arriving by JR or bus】Please contact us upon your arrival at the Kusatsu Onsen Bus Terminal. We will pick you up promptly.
Frequently Asked Questions
Please provide information about Open-air bath.
・Hot spring: Available ・Free-flowing: Available ・Cloudy hot spring water: None ・Supplementary information: 100% natural hot spring Alternating use for men and women. Available from 2:00 PM to 10:00 AM the next morning. (*Closed from 3:30 AM to 4:30 AM for gender switch.) *The Onsen water may cause a tingling sensation on your skin or feel hotter than its actual temperature due to its acidic nature. Your skin will adjust in about one minute. *The temperature of the Onsen water can be adjusted upon request, which may involve adding water or heating it.
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: Onsen containing acidic sulfur, aluminum, sulfate, and chloride. ・Spring efficacy: In addition to the general benefits of Onsen (neuralgia, muscle pain, joint pain, frozen shoulder, motor paralysis, joint stiffness, bruises, sprains, chronic digestive diseases, hemorrhoids, sensitivity to cold, post-illness recovery, health promotion), it is highly effective for skin diseases, chronic gynecological conditions, diabetes, hypertension, and arteriosclerosis.
What kind of facilities and features are available?
There are the following facilities and features. Hot spring・Rooms with open-air baths available・Open-air bath・Free-flowing hot spring・Large public bath・Within a 5-minute walk to the convenience store.・Free shuttle service
I would like to know the access information.
Get off at JR Agatsuma Line Naganohara-Kusatsuguchi Station, take a JR bus for 25 minutes to Kusatsu Bus Terminal, then walk 7 minutes (free Shuttle Service available to the bus stop).
Is parking available?
・Fee： Free for guests ・Parking Hours： 14:00～12:00 the next day ・Parking space： Length --- Vehicle width --- Vehicle height --- ・Number of parking spaces： 50 cars ・Valet Service： Available (free) There is a parking lot on the premises. You can use it from around 12:00 on the day of arrival. Please be sure to contact the front desk when using it.
Please provide information about Room with Onsen Indoor Bath.
・Hot spring: Available ・Free-flowing: Available ・Cloudy hot spring water: None * When soaking in the water, you may feel a tingling sensation on your skin or perceive the temperature as hotter than it actually is. This is a characteristic of acidic Onsen. Your skin will adjust to the water in about one minute. * The temperature of the Onsen water can be adjusted.
Is an internet connection available?
Connection is possible. ・Wi-Fi is available. For more details, please refer to the room and plan information.
What kind of hygiene management is being conducted?
To Our Valued Guests, Thank you very much for choosing to stay with us. We sincerely appreciate your visit to our Property. To ensure the safety and peace of mind of our guests, we have implemented thorough measures against COVID-19. All staff at our Facility are committed to maintaining hygiene within the Property and managing their own health to the highest standards. We kindly ask for your understanding and cooperation with the following measures. 【Our Initiatives】 1. Alcohol-based hand sanitizers are placed at the entrance of the Ryokan, lobby, dining areas, in front of elevators, and other locations throughout the Property. 2. In addition to regular cleaning of the Property and dining areas, we have enhanced the disinfection and sterilization of frequently touched items such as handrails, doorknobs, Room keys, and other equipment. Rooms are prepared after disinfection using an ozone generator. 3. All staff and business partners are required to maintain strict hygiene management in the back areas. This includes temperature checks upon reporting to work, thorough hand washing and sanitization, and a system to monitor and manage health conditions and actions in case of illness. 4. For the safety of our guests and staff, all employees are required to wear masks. 【Requests to Our Guests】 1. At check-in, we kindly ask you to fill out a health questionnaire and undergo a temperature check (temperature checks are optional). 2. Please sanitize your hands upon entering and leaving the Property. 3. We request that you wear a mask in shared spaces. 4. Dinner and breakfast will be served at staggered times to avoid crowding with other guests. 5. When using the restroom, please close the toilet lid before flushing. 6. During check-out, the front desk may become crowded. We kindly ask that only one person from your party approaches the front desk for payment. We also recommend settling your bill in advance if possible. 7. If you feel unwell during your stay, please inform the nearest staff member immediately.
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