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 4/6/2026
  • We 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
Open-air bath / Free-flowing hot spring / Large public bath / Private bath
IN15:00~18:00
OUT10:00
Number of rooms15 rooms
PetNot allowed
Your childNot allowed
We do not accommodate children below elementary school age.

【Sansui Kaiseki】Directly sourced fresh fish from Amakusa served luxuriously as "Funamori"! Includes 2 meals

IN 15:00~18:00
OUT 10:00
¥31,900~
Dinner and Breakfast included ; 2 peopleTax included¥31,262〜
(USD 198.73)

【One drink included during dinner】Couple Plan exclusively for guests using 2 persons ~Sansui is an adult-only Ryokan~

IN 15:00~18:00
OUT 10:00
¥33,000~
Dinner and Breakfast included ; 2 peopleTax included¥32,340〜
(USD 205.58)

【Sansui Kaiseki】Directly sourced fresh fish from Amakusa served luxuriously as "Funamori"! Includes 2 meals

IN 15:00~18:00
OUT 10:00
¥33,000~
Dinner and Breakfast included ; 2 peopleTax included¥32,340〜
(USD 205.58)

【One drink included during dinner】Couple Plan exclusively for guests using 2 persons ~Sansui is an adult-only Ryokan~

IN 15:00~18:00
OUT 10:00
¥34,100~
Dinner and Breakfast included ; 2 peopleTax included¥33,418〜
(USD 212.43)

【Sansui Kaiseki】Directly sourced fresh fish from Amakusa served luxuriously as "Funamori"! Includes 2 meals

IN 15:00~18:00
OUT 10:00
¥39,600~
Dinner and Breakfast included ; 2 peopleTax included¥38,808〜
(USD 246.70)

【Ise Lobster Kaiseki】Savor Ise lobster directly from Amakusa with "sashimi" and "miso soup"! Includes 2 meals.

IN 15:00~18:00
OUT 10:00
¥48,400~
Dinner and Breakfast included ; 2 peopleTax included¥47,432〜
(USD 301.52)

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Introduction of the Accommodation

Exterior
Welcome. A property that combines nostalgia and heartfelt hospitality.

"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

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

Meal

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

Room
Room
Other Facilities
Other Facilities

Facilities and Equipment of Accommodation

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

Notice from the Accommodation

  • [September Only] Aso Recovery Discount: Information on the “Oguni Town Accommodation-Only Voucher”

    Thank you very much for your continued patronage of Ryokan Sansui.

    Advance reservations are now open in Oguni Town for the September-only “Aso Recovery Discount: Oguni Town Accommodation Voucher.”

    These vouchers can be used at participating Accommodations in Oguni Town, offering a great opportunity to enjoy your trip and stay at a better value.

    If you are considering a stay at Ryokan Sansui, we encourage you to take advantage of this offer.

    About the “Aso Recovery Discount: Oguni Town Accommodation Voucher”

    An advance reservation is required to purchase the voucher.

    For details such as sales information, how to purchase, terms of use, and current reservation availability, please visit the official website of the ASO Oguni Tourism Association.

    * Please note that vouchers are subject to conditions such as limited quantities and a designated validity period.
    * For the latest availability and terms of use, please refer to guidance from the Oguni Town Tourism Association.
    * For inquiries regarding the voucher, please contact the inquiry desk listed on the information page.

    Visit Oguni Town & Waita Onsen in September

    In September, Oguni Town begins to show hints of autumn little by little.

    At Ryokan Sansui, we welcome you with free-flowing natural Onsen baths and seasonal cuisine.

    Enjoy a relaxing escape from everyday life at our hilltop Ryokan with views of the Aso mountains.

    All of us on staff look forward to welcoming you.

Basic Information

TaxesA Hot Spring Tax of 150 yen will be charged separately.
Card information
VISA / MASTER / JCB / DINERS
Pets
Not allowed
BreakfastWe 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
  • ○ 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
Public Bath
The number of Public Bath
4
Business Hours
---
Hot spring
Available
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring
Remarks
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
Open-air bath
The number of Open-air bath
3
Business Hours
---
Hot spring
Available
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring
Remarks
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
Private bath
The number of Private bath
11
Business Hours
---
Hot spring
Available
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring
Remarks
[Water Quality] Hypotonic weak alkaline spring [Benefits] Relieves muscle pain, alleviates cold sensitivity, recovers fatigue
Room with Open-Air Bath
Hot spring
Available
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring
Remarks
[Water Quality] Hypotonic weak alkaline spring [Benefits] Relieves muscle pain, alleviates cold sensitivity, recovers fatigue
Room with Onsen Indoor Bath
Hot spring
Available
Free-flowing
Available
Milky hot spring water
Available
Additional Information
100% natural hot spring
Remarks
[Water Quality] Hypotonic weak alkaline spring [Benefits] Relieves muscle pain, alleviates cold sensitivity, recovers fatigue
Spring quality and benefits

Hypotonic weak alkaline spring.

Muscle pain, cold sensitivity, fatigue recovery

※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
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

Overall Score
4.37
Good (58)
  • Rooms & Amenities
    4.10
  • Facility
    4.05
  • Hospitality & Service
    4.50
  • Meals
    4.57
  • Onsen & Bath
    4.60
  • Satisfaction
    4.38

*Reviews that have been translated from Japanese.*

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

Access Information

Address
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
No reservation required

Pickup and drop-off information
Unavailable

Frequently Asked Questions

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