Lobby
Restaurant
Room
Meal
Roasted marshmallow
129 photos

THE KEY HIGHLAND NASU

Tochigi Prefecture／Nasu Onsen
¥52,800～
Dinner and Breakfast included ; 2 peopleTax included¥47,520〜
(USD 301.08)

An all-inclusive highland resort where you can savor exceptional cuisine and unwind in an infinity open-air bath.

A Resort Hotel designed with three key concepts: "Enjoying the rich highlands," "Harmony with nature," and "All-Inclusive." All activities within the Facility are included in the accommodation fee, allowing you to freely enjoy meals, alcoholic beverages, the pool, karaoke, and more. Surrounded by the nature that stretches out before you, refresh both your mind and body. The chirping of birds, soft sunlight filtering through the trees, and the gentle breeze—all nurtured by this forest—welcome you warmly and tenderly.

4.55 - Wonderful(115)
  • A First-Time Experience

    It was my first time staying at an all-inclusive Hotel, and I was truly impressed by how outstanding and delicious the food was. The staff were also very helpful and responded quickly to any questions, which I really appreciated. I would like to visit again during the autumn foliage season.

    いわし煮さん 9/4/2026
  • Like a well-maintained private villa

    It was my first visit. As soon as I arrived, I was shown to the lounge. The ceiling was very high, and I was surprised to see a wood fire burning in the center. There was a wide variety of drinks. I enjoyed roasting marshmallows. There was also a pool. The bath had a great view and felt wonderful. As for the meals, it was a buffet, but since it was in pre-opening, there were appetizers first; once the meal began in earnest, the food quality was high and everything was very delicious. I tried every dessert as well, and they were all delicious. I enjoyed plenty of drinks right up until departure. I was very satisfied. I would like to visit again.

    たらふく赤いちご 9/9/2026

Facilities and Services

See All
  • Hot spring
  • Room with Open-Air Bath
Open-air bath / Large public bath / Sauna / Indoor pool / Free shuttle service
IN15:00～18:00
OUT11:00
Number of rooms36 rooms
PetNot allowed
Your childPermitted

Photo

See All
Western-style Twin Room
Western-style Twin Room
  • Twin
  • 22㎡
  • Capacity 1~2 people

[Western-Style Twin Room] Recommended for couples, married couples, and girls’ trips – 1 night with 2 meals included

IN 15:00～18:00
OUT 11:00
¥52,800～
Dinner and Breakfast included ; 2 peopleTax included¥47,520〜
(USD 301.08)
Maisonette
  • Fourth
  • 33㎡
  • Capacity 1~4 people

[Families & Groups] Spacious rooms to relax with family and friends — 1 night with breakfast & dinner included

IN 15:00～18:00
OUT 11:00
¥59,400～
Dinner and Breakfast included ; 2 peopleTax included¥53,460〜
(USD 338.72)
Japanese-Western style room
Japanese-Western style room
  • Japanese-Western room
  • 33㎡
  • Capacity 1~5 people

[Families & Groups] Spacious rooms to relax with family and friends — 1 night with breakfast & dinner included

IN 15:00～18:00
OUT 11:00
¥60,500～
Dinner and Breakfast included ; 2 peopleTax included¥54,450〜
(USD 344.99)

Best-Selling Stays

Ranking Of Accommodation With Delicious Dinner Buffet

Hotel With Kid-Friendly Facilities And Experiences

Affordable Accommodation With Delicious Meals

Hotel With A Theme Park-Like Worldview

Accommodation With Easy Access To Tour Facilities

Introduction of the Accommodation

Three keys tailored to the travel situation to cherish the mood and feelings of the moment.

All-Inclusive
Enjoy the rich highlands

We offer a variety of unique activities at the Nasu Kogen Onsen resort.

Pool
Harmony with nature

You can experience a sense of unity with vast nature in the lush green environment of the Hotel's expansive grounds.

Nature
KEY3 All-Inclusive

Meals, alcoholic beverages, and even Facility amenities like the pool are available for free※.

Restaurant

Restaurant

We offer exquisite highland cuisine featuring fresh ingredients from the local Nasu Highlands.

Room
Room

We offer six types of Rooms, including private open-air baths and loft-equipped options. The Rooms are simple yet comfortable.

Pool
Other Facilities

You can enjoy the Onsen in the large stone-built bathhouse. Additionally, we have a water garden available.

Facilities and Equipment of Accommodation

  • The room
    The room
  • Restaurant
    Restaurant
  • Facilities & Services
    Facilities & Services

Notice from the Accommodation

  • Morning Yoga

    WAKE UP YOGA Schedule

    A refreshing morning yoga session.
    Beginner-friendly poses make it easy for first-timers to join.
    Starting your day with gentle movement may help you notice how your body feels throughout the day.
    Wake up just a little earlier and start your day on a positive note.

    [Dates]
    Every Wednesday, Thursday, Saturday, and Sunday
    Every Wednesday, Thursday, Saturday, and Sunday
    Every Wednesday, Thursday, Saturday, and Sunday
    Every Wednesday, Thursday, Saturday, and Sunday
    *Available to guests staying the night before the session date.

    [Time] Meet at 6:50 AM (Morning yoga session: approx. 30 minutes)
    [Location] Yoga House
    [Fee] Free for overnight guests

    - Please wear comfortable clothing. If needed, bring a towel.
    - Yoga mats will be provided.
    - To get to the Yoga House, please wear your own shoes (not indoor slippers).
    - The program may be changed or canceled without notice depending on circumstances.

    *Images are for illustrative purposes only. Please check our official website for the latest information.

Basic Information

Card information
VISA / MASTER / JCB / AMEX / DINERS / UnionPay
Pets
Not allowed
Breakfast[Breakfast] Buffet
Your child
You can stay.
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
Indoor pool
Available period
---
Business Hours
15:00~22:00
Final admission time
---
Fee（Guest）
Free
Fee（Non-guest）
---
Children's pool
None
Age restriction
Pool shape
Rectangular
Pool size
Length 15m

Water depth 60cm ～ 110cm
Pool Hours: 8:00–10:00 / 15:00–22:00 *Please bring your swimsuit when using the pool.*
Esthetic Massage
None
Fitness gym
None
Public Bath
The number of Public Bath
2
Business Hours
15:00~24:00
Hot spring
Available
Free-flowing
None
Milky hot spring water
None
Additional Information
(Heating, Adding Water)
Remarks
- The forest spa is open until 11:30 PM. - Morning hours: 5:00 AM–10:30 AM.
Open-air bath
The number of Open-air bath
2
Business Hours
15:00~24:00
Hot spring
Available
Free-flowing
None
Milky hot spring water
None
Additional Information
(Heating, Adding Water)
Remarks
• Morning hours: 5:00–10:30
Room with Open-Air Bath
Hot spring
Available
Free-flowing
None
Milky hot spring water
None
Additional Information
(Heating, Adding Water)
Remarks
Spring quality and benefits

Simple Onsen (neutral, hypotonic, low-temperature spring)

Neuralgia, muscle pain, joint pain, frozen shoulder, and more

SaunaAvailable
Hot stone spaNone
OthersPlease note that table tennis is no longer available due to the opening of the “Forest Spa” in March 2023.

Reviews

Overall Score
4.55
Wonderful (115)
  • Rooms & Amenities
    4.49
  • Facility
    4.45
  • Hospitality & Service
    4.52
  • Meals
    4.64
  • Onsen & Bath
    4.64
  • Satisfaction
    4.55

*Reviews that have been translated from Japanese.*

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

Access Information

Address
Tochigi Prefecture3243-342 Takakuhei, Nasu-machi, Nasu-gun
TEL：+81-287-77-7000

By train: 25 minutes by taxi from Kuroiso Station
By car: 18 km from Nasu IC
*As this is a new Facility, please set your car navigation system by searching the address.*

Parking Information
Fee
Free for guests
Parking time
---
Parking space
No restrictions
Number of parking spaces
32 cars available outdoor
Valet service
Unavailable

Pickup and drop-off information
Available (Free)Free Shuttle Service from Nasushiobara Station and any changes to the pickup time require an advance Reservation at least 5 days in advance (Phone: 0120-017-545).
From Nasushiobara Station: 14:30, 16:30　From the Hotel: 11:00

*Please note that we may be unable to accept Shuttle Service Reservations depending on availability.*

Frequently Asked Questions

Search from the Hotel Group

Search by Theme

Find by hot spring area

Find by tourist destination