A hidden retreat for adults located at an altitude of approximately 800 meters. Enjoy hot spring hopping and seasonal flavors.
A hidden retreat for adults situated on a high plateau overlooking Aso. Enjoy 10 types of onsen, including a mixed-gender open-air bath at an altitude of approximately 800m and a cave bath. The cuisine, featuring steamed dishes using onsen steam and fresh seafood directly from Amakusa, is exquisite. Spend a moment forgetting the hustle and bustle of the city.
We stayed in a detached annex. The website said “indoor bath type,” and there were no photos, so we expected a regular bath—but it pleasantly exceeded our expectations. I really think you should post photos of that bath on the website! We originally planned to use the open-air bath, but ended up using the in-room bath the whole time (lol). Also, I believe it was fully booked, yet while we were in our Room we couldn’t hear any voices or noise from other guests at all. You can definitely feel its age, but as a Ryokan it had everything we were looking for.Both dinner and breakfast were delicious and very generous in portion size. In particular, I made a Reservation for the half steamed chicken at dinner and it was quite an experience (in a good way). From the website photos I (wrongly) imagined a bone-in thigh, but it truly was “half.” It was very tasty, but you’ll need to save room in your stomach (especially women). When we asked, they even prepared the leftover steamed chicken so we could eat it in our Room!All staff members were wonderful—everyone was pleasant and welcoming. This quiet mountain Ryokan fulfilled everything I wanted: simply enjoying the Onsen and great food. Thank you very much.
冷やしぶっかけうどん 4/6/2026We were welcomed very warmly. The building and Facility are undeniably old, the air conditioner’s heating didn’t work (there was a warm-air heater), the sliding door between the bedroom and living room wouldn’t close properly, and the yukata were quite worn (though they were properly laundered). The floor chairs in the living room were uncomfortable, and I wished there had been a regular chair. In winter, it seems this becomes a sunken kotatsu. That said, the bath was wonderful, and with the great view, excellent service, and delicious food, it all balanced out overall... Since we stayed in a detached room with a semi-open-air bath, we were able to relax and enjoy our time.
ひばりうみ 5/18/2026
Facilities and Services
See All- Hot spring
- Room with Open-Air Bath
| IN | 15:00~18:00 |
|---|---|
| OUT | 10:00 |
| Number of rooms | 15 rooms |
| Pet | Not allowed |
| Your child | Not allowed |
| We do not accommodate children below elementary school age. |
Photo
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Introduction of the Accommodation

"Located in Oguni Town, Kumamoto Prefecture, 'Ryokan Sansui' is a tranquil mountain retreat welcoming guests with majestic nature and warm hospitality. Situated at an altitude of 800 meters, surrounded by the beautiful scenery of each season, enjoy a relaxing time in nature with steamed dishes using Onsen steam and fresh seafood directly from Amakusa."

Onsen and bath
Our facility offers 11 family open-air baths with a panoramic view of the Aso outer mountains, along with over a dozen other types of baths.

Meal
We take pride in our cuisine, featuring the blessings of Aso's outer rim nature and the bounties of Amakusa's seafood.


Facilities and Equipment of Accommodation
- The room
- Hot Springs & Baths
- Facilities & Services
- Meal
Basic Information
| Taxes | A Hot Spring Tax of 150 yen will be charged separately. |
|---|---|
| Card information | VISA / MASTER / JCB / DINERS |
| Pets | Not allowed |
| Breakfast | We prepare our signature dish steamed with the steam from the Onsen after guests are seated at the open kitchen. In addition to steamed dishes, breakfast includes pickled fresh fish prepared the day before, grilled dried fish, and various pickles made by the skilled proprietress with a background as a fisherwoman. All dishes at Sansui are handmade by the chef and the proprietress, without using pre-made products. |
| Your child | You cannot stay. We do not accommodate children below elementary school age. |
| Room service | Not available |
| Common amenities |
|
| Facilities and Features |
|
| Esthetic Massage | None |
| Fitness gym | None |
| Public Bath |
|
| Open-air bath |
|
| Private bath |
|
| Room with Open-Air Bath |
|
| Room with Onsen Indoor Bath |
|
| Spring quality and benefits | Hypotonic weak alkaline spring. Muscle pain, cold sensitivity, fatigue recovery ※Regarding the notation of "Gensen Kakenagashi" |
| Sauna | None |
| Hot stone spa | None |
| About Hygiene Measures | 【To Our Guests】
To ensure your peace of mind, we are implementing measures to prevent the spread of the novel coronavirus at our facility.
● Within the facility
・Staff will respond while wearing masks
・Alcohol disinfectants are provided in shared areas
・Thorough disinfection cleaning and ventilation of guest rooms
● Dining area
・Meals are prepared in private dining rooms exclusively for guests
● Request
We kindly ask for your cooperation in wearing masks within the facility |
Reviews
- Rooms & Amenities4.12
- Facility4.07
- Hospitality & Service4.49
- Meals4.56
- Onsen & Bath4.61
- Satisfaction4.39
*Reviews that have been translated from Japanese.*
*Showing only reviews from 一休.com (Japanese) and Yahoo!トラベル.*
Access Information
Kumamoto PrefectureAso-gun, Oguni-machi, Nishizato 3044, Hage no Yu
TEL:+81-967-46-4547
【By Train or Bus】
From JR Hōhi Main Line Aso Station, take the Kyushu Sanko Bus bound for Tsuetate Onsen for 45 minutes, transfer to the Kyushu Sanko Bus bound for Take no Yu at Yu Station for 45 minutes, alight at the final stop, and walk 8 minutes.
【By Car】
From the Kuju IC on the Oita Expressway, take R387 towards Oguni for 30 minutes.
- Parking Information
- Fee
- Free for guests
- Parking time
- 15:00 to 12:00 the next day
- Parking space
- No restrictions
- Number of parking spaces
- 40 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: Available ・Cloudy hot spring water: None ・Supplementary information: 100% natural hot spring Day-use Bathing 8:00~15:00 500 yen Bathing with Meal 11:00~14:30 4,000 yen~(Please Complete the Reservation in advance) [Spring Quality] Low-tonicity weak alkaline spring [Benefits] Relieves muscle pain, Counteracts coldness, Recovers fatigue
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・Private bath
I would like to know the access information.
【By Train or Bus】 From JR Hōhi Main Line Aso Station, take the Kyushu Sanko Bus bound for Tsuetate Onsen for 45 minutes, transfer to the Kyushu Sanko Bus bound for Take no Yu at Yu Station for 45 minutes, alight at the final stop, and walk 8 minutes. 【By Car】 From the Kuju IC on the Oita Expressway, take R387 towards Oguni for 30 minutes.
Is parking available?
・Fee: Free for guests ・Parking Hours: 15:00 to 12:00 the next day ・Parking space: Length --- Vehicle width --- Vehicle height --- ・Number of parking spaces: 40 cars ・Valet Service: Unavailable No reservation required
Please provide information about Room with Onsen Indoor Bath.
・Hot spring: Available ・Free-flowing: Available ・Cloudy hot spring water: Available ・Supplementary information: 100% natural hot spring [Water Quality] Hypotonic weak alkaline spring [Benefits] Relieves muscle pain, alleviates cold sensitivity, recovers fatigue
Please provide information about Private bath.
・Hot spring: Available ・Free-flowing: Available ・Cloudy hot spring water: None ・Supplementary information: 100% natural hot spring [Water Quality] Hypotonic weak alkaline spring [Benefits] Relieves muscle pain, alleviates cold sensitivity, recovers fatigue
What kind of hygiene management is being conducted?
【To Our Guests】 To ensure your peace of mind, we are implementing measures to prevent the spread of the novel coronavirus at our facility. ● Within the facility ・Staff will respond while wearing masks ・Alcohol disinfectants are provided in shared areas ・Thorough disinfection cleaning and ventilation of guest rooms ● Dining area ・Meals are prepared in private dining rooms exclusively for guests ● Request We kindly ask for your cooperation in wearing masks within the facility
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