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Mimizuka Natural Hot Spring "Kigokoro no Yu" Aso Resort Grandvrio Hotel - Route Inn Hotels -

Kumamoto Prefecture／7 minutes by car or taxi from Akamizu Station.
¥18,200～
No meals ; 2 peopleTax included¥16,380〜
(USD 102.80)

Enjoy breathtaking views of Aso and relax in the Onsen! A premium resort experience surrounded by nature.

Set against the majestic backdrop of the Aso Outer Mountains, experience the refreshing highland breeze at "Aso Resort Granvrio Hotel - Route Inn Hotels". From its 180 guest rooms, enjoy the seasonal natural scenery and unwind in the natural Onsen sourced directly from the spring. Savor dishes made with local ingredients, rejuvenate with golf and a variety of activities, and let the cheerful staff create an unforgettable stay for you.

Reviews

(8)
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Facilities and Services

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  • Hot spring
Open-air bath / Free-flowing hot spring / Large public bath / Sauna / Ganbanyoku (rock bathing)
IN15:00～24:00
OUT11:00
Number of rooms180 rooms
PetNot allowed
Your childNot allowed
■Information on Child Sharing Existing Bedding■ Elementary school children (Child Sharing Existing Bedding): JPY 2,000 (tax included) Infants and toddlers (Child Sharing Existing Bedding): Free If a child will be sharing existing bedding in excess of the Room capacity, please do not include the child in the number of guests when searching for availability, and instead enter the details in the comments section. ■Request regarding guest rooms with a maximum occupancy of 2 guests■ If you use a room with a maximum occupancy of 2 guests as “1 adult + 1 child sharing existing bedding,” you will be charged the rate for 2 adults. Thank you for your understanding. For details, please contact the Hotel.

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Notice from the Accommodation

Regarding the Hotel annex hot spring Facility “Kigokoro no Yu,” where exterior wall reinforcement work has been underway, the women’s bath, stone sauna, massage, spa treatments, and karaoke will reopen as scheduled on February 9, 2026.
However, during this work we discovered more extensive age-related deterioration than expected in the ceiling, walls, pillars, and other areas.
As a result, we will change from partial repairs to a full renovation carried out in two phases for the men’s and women’s baths.
Accordingly, we will extend the construction period as outlined below and make partial changes to large public bath operations.
We will proceed with the work with our guests’ safety as our top priority. We sincerely appreciate your understanding and cooperation.

<Room B> Twin Room B - Forest Side (24.37 m²)
【Non-Smoking】Twin Room B (Forest Side)
  • Twin
  • 24.3㎡
  • Capacity 1~3 people

【Boasting a variety of activities, enjoyable for the whole family】Refresh at the natural Onsen with direct source flow ＜No meals included＞

IN 15:00～24:00
OUT 11:00
¥18,200～
No meals ; 2 peopleTax included¥16,380〜
(USD 102.80)

【Enjoy a Panoramic View of the Outer Rim Mountains】 Breakfast featuring local specialties from Aso with a focus on locally sourced ingredients, paired with natural hot springs fed directly from the source.

IN 15:00～24:00
OUT 11:00
¥22,160～
Breakfast included ; 2 peopleTax included¥19,950〜
(USD 125.20)
<Room A> Twin Room A - Outer Mountain Side
[Non-Smoking] Twin Room A (Outer Mountain Side)
  • Twin
  • 24.3㎡
  • Capacity 1~3 people

【Boasting a variety of activities, enjoyable for the whole family】Refresh at the natural Onsen with direct source flow ＜No meals included＞

IN 15:00～24:00
OUT 11:00
¥21,200～
No meals ; 2 peopleTax included¥19,080〜
(USD 119.74)

【Enjoy a Panoramic View of the Outer Rim Mountains】 Breakfast featuring local specialties from Aso with a focus on locally sourced ingredients, paired with natural hot springs fed directly from the source.

IN 15:00～24:00
OUT 11:00
¥25,160～
Breakfast included ; 2 peopleTax included¥22,650〜
(USD 142.15)

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Introduction of the Accommodation

Bathroom
Open-air bath
Public Bath
Bathroom
Open-air bath
Relax in the natural Onsen of Aso with water directly flowing from the source.

The Komezuka Onsen, emerging from the foot of Mount Aso, is effective for relieving muscle pain, cold sensitivity, and fatigue recovery. Relax and soothe your travel fatigue in the separate large baths for men and women. In the open-air baths filled with a sense of freedom, you can relax both body and mind while enjoying the richness of nature.

Guest room

A blissful moment in a guest room overlooking the beautiful nature of Aso.

Rooms overlooking the outer rim mountains preserve the natural beauty. Bright and spacious, you can relax while enjoying the grandeur of Aso's nature. The view from the balcony is like a painting. The suite offers an ideal space for family or group stays.

Restaurant

Filled with the blessings of Aso! Savor seasonal flavors at a restaurant with breathtaking views.

Dishes made with abundant local Kumamoto ingredients are masterpieces created by the chef's skilled techniques and dedication. At the buffet restaurant "Wa Nagomi," you can enjoy a variety of menus for both dinner and breakfast while overlooking the outer rim mountains. Savor the taste of Aso with local cuisine emphasizing locally sourced ingredients.

Facilities and Equipment of Accommodation

  • The room
    The room
  • Restaurant
    Restaurant

Basic Information

Card information
VISA / MASTER / JCB / AMEX / DINERS / UnionPay
Pets
Not allowed
BreakfastThere is no information about breakfast.
Your child
You cannot stay.
■Information on Child Sharing Existing Bedding■ Elementary school children (Child Sharing Existing Bedding): JPY 2,000 (tax included) Infants and toddlers (Child Sharing Existing Bedding): Free If a child will be sharing existing bedding in excess of the Room capacity, please do not include the child in the number of guests when searching for availability, and instead enter the details in the comments section. ■Request regarding guest rooms with a maximum occupancy of 2 guests■ If you use a room with a maximum occupancy of 2 guests as “1 adult + 1 child sharing existing bedding,” you will be charged the rate for 2 adults. Thank you for your understanding. For details, please contact the Hotel.
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
---
Hot spring
Available
Free-flowing
Available
Milky hot spring water
Available
Additional Information
100% natural hot spring (Heating)
Remarks
Open-air bath
The number of Open-air bath
2
Business Hours
---
Hot spring
Available
Free-flowing
Available
Milky hot spring water
Available
Additional Information
100% natural hot spring (Heating)
Remarks
Spring quality and benefits

Sulfate Spring

Poor circulation, fatigue recovery, and muscle soreness relief

※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 spaAvailable
OthersOther accepted cards: DC Card, WAON, Rakuten Edy

Reviews

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*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 City Akamizu Komezuka Onsen
TEL：+81-967-35-2111

Nearest station: Akamizu Station (7 minutes by car/taxi)

Nearest interchange: Kumamoto IC (40 minutes by car)

Nearest airport: Kumamoto Airport (35 minutes by car/taxi)

Parking Information
Fee
Free for guests
Parking time
---
Parking space
No restrictions
Number of parking spaces
450 cars available Indoor & Outdoor
Valet service
Available (Free)
450 parking spaces available on-site.

Pickup and drop-off information
Unavailable

Frequently Asked Questions

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