A natural Onsen accommodation quietly nestled in the vast caldera of Aso Akamizu Onsen Village.

After 10 years, Aso Hakun Sanso has reopened as a Resort Hotel Onsen nestled in the magnificent nature of Mount Aso. From the property, you can enjoy views of the majestic Aso mountains, relax in the Akamizu Onsen known for its skin-beautifying effects, and savor the hotel's delicious cuisine.

  • Nearly 30 years ago, I stayed several times at the old Hakun Sanso before it was rebuilt. I was disappointed when it was demolished, but after seeing an advertisement that it had newly reopened, I decided to stay again for the first time in a long while. The bath area was clean, though I was a bit disappointed there wasn’t an open-air bath. The buffet meals were also delicious. Perhaps because it was the last night of a holiday weekend, there were few guests and I could relax. One small issue: the chairs at the Room table set were too high and uncomfortable to sit on.

    Yahoo!トラベルユー... 7/24/2026
  • I stayed in a third-floor Room with a view of Mt. Aso, and we were lucky to have great weather, so we could see the full moon (Blue Moon) and the sunrise the next morning from the Room—it was beautiful. The bath doesn’t have an open-air bath, but it felt clean and was very pleasant. Meals were buffet-style, and because there weren’t too many items, everything was served hot and tasted excellent. I would like to stay at this Accommodation again.

    Yahoo!トラベルユー... 6/2/2026

Facilities and Services

See All
  • Hot spring
  • Accessibility
Large public bath / Sauna / Free shuttle service
IN15:00~19:00
OUT10:00
Number of rooms66 rooms
PetNot allowed
Your childPermitted
2 single beds with unit bath.
  • Twin
  • 23㎡
  • Capacity 1~2 people

[Weekday Only] [Std Twin for 1-2 Guests] Relax and rejuvenate in the Onsen with a 1-Night Stay and Breakfast Free Plan

IN 15:00~21:00
OUT 10:00
¥19,000
Breakfast included ; 2 peopleTax included¥16,195
(USD 101.63)

Relax with Aso's pristine natural Onsen and delicious meals! 【Standard Plan with 1 Night and 2 Meals】

IN 15:00~19:00
OUT 10:00
¥33,300
Dinner and Breakfast included ; 2 peopleTax included¥28,305
(USD 177.64)

[Weekday Only] [Std Twin for 1-2 Guests] Relax and rejuvenate in the Onsen with a 1-Night Stay and Breakfast Free Plan

IN 15:00~21:00
OUT 10:00
¥19,000
Breakfast included ; 2 peopleTax included¥16,195
(USD 101.63)

Relax with Aso's pristine natural Onsen and delicious meals! 【Standard Plan with 1 Night and 2 Meals】

IN 15:00~19:00
OUT 10:00
¥31,100
Dinner and Breakfast included ; 2 peopleTax included¥26,435
(USD 165.90)

Relax with Aso's pristine natural Onsen and delicious meals! 【Standard Plan with 1 Night and 2 Meals】

IN 15:00~18:00
OUT 10:00
¥35,500
Dinner and Breakfast included ; 2 peopleTax included¥30,175
(USD 189.37)

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Introduction of the Accommodation

Basic Information

Card information
VISA / MASTER / JCB / AMEX / DINERS
Pets
Not allowed
BreakfastJapanese and Western Buffet
Your child
You can stay.
Please accurately enter your child's age when making a Reservation. If there is any discrepancy upon arrival, additional charges may apply (changes or additions may not be possible on certain days). In case of discrepancies, please ensure to make changes or contact us in advance. Please note that children aged 3 and above will be charged a Facility usage fee and meal fee even if they are Child Sharing Existing Bedding (please refrain from assuming it is free due to sharing bedding).
Room service
Not available
Common amenities
  • ○ Shampoo · conditioner
  • ○ Body soap · soap
  • ○ Towel · Bath towel
  • × Body towel · sponge
  • ○ Toothbrush set
  • ○ Comb · Brush
  • ○ Shower cap
  • ○ Hair dryer
  • ○ Shaving
  • × Shaving Gel/Foam
  • × Bath additives
  • ○ Yukata
  • × Nightwear
  • × 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
  • × Video on Demand
  • × Radio
  • × CD player
  • × DVD player
  • × Blu-ray player
  • × Speakers for portable audio
  • × In-room PCs and tablets
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
2
Business Hours
05:30~23:00
Hot spring
Available
Free-flowing
None
Milky hot spring water
None
Additional Information
100% natural hot spring (Heating)
Remarks
Cleaning time: 9:00 AM - 3:00 PM
Spring quality and benefits

Sodium, Magnesium, Calcium Sulfide Salt Onsen (Hypotonic, Neutral, Low-temperature Onsen)

Trauma, Joint Pain, Rheumatism & Neurological Disorders

※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

Reviews

Overall Score
4.53
Wonderful (58)
  • Rooms & Amenities
    4.57
  • Facility
    4.55
  • Hospitality & Service
    4.74
  • Meals
    4.37
  • Onsen & Bath
    4.40
  • Satisfaction
    4.57

*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 Prefecture7-1 Muta, Aso City
TEL:+81-967-35-0111

10-minute walk from JR Hōhi Main Line "Akamizu Station"

30 minutes by car from Aso Kumamoto Airport
40 minutes by car from Kyushu Expressway Kumamoto IC

Parking Information
Fee
Free for guests
Parking time
15:00 - 10:00 (next day)
Parking space
No restrictions
Number of parking spaces
80 cars available outdoor
Valet service
Unavailable

Pickup and drop-off information
Available (Free)JR Higo Main Line "Akamizu Station"

Frequently Asked Questions

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