Izu Atagawa Onsen Hotel Cetus Royal

Shizuoka Prefecture/Atagawa Onsen

Buffet with fresh ingredients, blue dome pool, all rooms with ocean view, and open-air hot spring bath with natural hot spring water for a luxurious time.

All Rooms in the Property offer ocean views, and the grand bath with a stunning view of Izu Oshima uses natural Onsen water from a private source. The Izu Peninsula's largest "Ohnotenburo" features 100% natural flowing spring water, allowing guests to enjoy bathing in nature while basking in the morning sunlight or gazing at the star-filled night sky. Dinner is served as a buffet featuring seasonal ingredients, and breakfast offers a Japanese-Western buffet. Additionally, the dome pool "Blue Whale" provides a unique "blue time" experience that cannot be found in everyday life. From every Room, guests can enjoy views of Izu Oshima and the other islands of the Izu Archipelago.

  • We were able to stay at a great price with a last-minute deal during heavy rain.The Room was disappointing in that there was no valuables box, and the toilet exhaust fan didn’t work. For valuables, we had to go all the way to the bath area on the 5th floor to use the valuables box there, then head to the far open-air bath on the 6th floor. The open-air bath was amazing. We went in during heavy rain wearing a woven hat, but there were only two, so other guests seemed inconvenienced.We enjoyed it enough and handed our umbrella over before leaving. It would be better if a few more were provided.Amenities in the Room were minimal, and anything else you need is placed on the 1st floor, so you go pick it up yourself.The pillow was very thin, so we borrowed one from three types of pillows available on the 1st floor.When I visited it was pouring rain and there weren’t many other guests, so pillows were still available—but I wonder if they restock them when it’s busy?As for meals, for this price they were acceptable. The steak was processed meat. It’s all-you-can-eat crab, but it’s better not to expect too much. There was also eel; warming it up on the hot plate after cooking steak made it tasty. For breakfast, the DIY rice bowl (toppings over rice) was delicious.Above all, drinks were all-you-can-drink from check-in until 11:00 p.m.—dinner started just 30 minutes after welcome drinks ended—and after that we went to the bar. Since you can take drinks back to your Room as well, we relaxed and drank plenty. The welcome oden and steamed meat buns were also delicious. We also enjoyed midnight udon as a late-night snack—overall we fully made use of everything.The staff members were foreigners as well, but everyone worked very hard and they were wonderful.We would definitely like to return again.Thank you very much.

    Yahoo!トラベルユー... 9/7/2026
  • I made my first Reservation after watching Joblog’s YouTube channel.It was a pleasant service after check-in.I’m planning to visit again.Thank you very much.

    Yahoo!トラベルユー... 5/19/2026

Facilities and Services

See All
  • Hot spring
Open-air bath / Free-flowing hot spring / Large public bath / Private bath / Sauna / Within a 5-minute walk from the station / Indoor pool / Free shuttle service
IN15:00~22:00
OUT10:00
Number of rooms48 rooms
PetNot allowed
Your childPermitted

Introduction of the Accommodation

"Large open-air bath overlooking Sagami Bay"

The largest "Oono Tenburo" in the Izu Peninsula offers 100% natural Onsen water directly from the source. Enjoy the atmosphere of bathing in the midst of untamed nature, basking in the morning sunlight or gazing at the star-filled night sky. ● Oono Tenburo The large public bath, utilizing the Shimami spring with weak sulfate Onsen water, has benefits for disinfecting and beautifying the skin. Both the men's and women's baths are equipped with saunas. ● Private Open-Air Bath Experience a different ambiance with the "Night Private Bath." Enjoy the largest "Oono Tenburo" in the Izu Peninsula as your own private space. On clear nights, you can also admire the starry sky. ● Onsen Large Public Bath The scenic large public bath uses natural Onsen water from our private spring. It offers a panoramic view of Sagami Bay and the Izu Seven Islands. <Operating Hours> Moonlit Bath: Women / 16:00–22:00, Men / 6:00–9:00 Starlit Bath: Men / 16:00–22:00, Women / 6:00–9:00 Private Open-Air Bath: 22:00–25:00, 30 minutes per group/session (Reservation required)

Facilities and Equipment of Accommodation

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

Notice from the Accommodation

  • Notice: Private Family Bath Available

    Nozomi Bath / Senri Bath

    Enjoy a relaxing private time with your family or friends in one of our two reservable family baths. Morning bathing will be available from July 1, 2026.
    Per group / per session: 45 minutes

    *With the opening of the reservable family baths, reservations for the Ono Open-Air Bath are no longer accepted.*
    Ono Open-Air Bath Hours
    Tsukiakari Bath: Women 16:00–24:00, Men 6:00–9:00 (next morning)
    Hoshiakari Bath: Men 16:00–24:00, Women 6:00–9:00 (next morning)

Basic Information

TaxesFrom March 1, 2025, it will be 300 yen per person per day (per night).
Card information
VISA / MASTER / JCB
Pets
Not allowed
Breakfast[Breakfast] Restaurant (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
09:00~24:00
Final admission time
---
Fee(Guest)
Free
Fee(Non-guest)
---
Children's pool
None
Age restriction
Children of elementary school age or younger must be accompanied by an adult.
Pool shape
Rectangular
Pool size


We do not offer rentals for swimsuits, swim caps, or swim diapers. Please bring your own. Please wear a swimsuit and swim cap when using the facility. Children who are not yet potty-trained must wear a swim diaper. Children of elementary school age and younger must be accompanied by an adult.
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
Remarks
Men’s Bath “Hikoboshi-no-Yu” / Women’s Bath “Orihime-no-Yu” 15:00–24:00 / 6:00–9:00 Sauna: 15:00–24:00
Open-air bath
The number of Open-air bath
2
Business Hours
16:00~24:00
Hot spring
Available
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring
Remarks
Moonlight Bath: Women 16:00–24:00 / Men 6:00–9:00 Starlight Bath: Men 16:00–24:00 / Women 6:00–9:00
Private bath
The number of Private bath
2
Business Hours
---
Hot spring
Available
Free-flowing
Available
Milky hot spring water
None
Additional Information
100% natural hot spring
Remarks
One session per group: 45 minutes Reservation required Please make your Reservation at the front desk during check-in.
Spring quality and benefits

Simple Onsen / Na Chloride Spring

Neuralgia Rheumatism / Women's Diseases / Post-illness Recovery Stress Relief / Joint Pain / Muscle Pain / Frozen Shoulder / Digestive System / Arteriosclerosis / Sensitivity to Cold

※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
Others[Other Available Cards] Rakuten Card

Reviews

Overall Score
3.97
(39)
  • Rooms & Amenities
    3.74
  • Facility
    3.87
  • Hospitality & Service
    4.31
  • Meals
    3.72
  • Onsen & Bath
    4.10
  • Satisfaction
    4.10

*Reviews that have been translated from Japanese.*

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

Access Information

Address
Shizuoka Prefecture980 Naramoto, Higashiizu-cho, Kamo-gun
TEL:+81-557-23-1123

[Izukyu Line] Get off at Izu-Atagawa Station, approximately 5 minutes on foot
[By Car] Use Route 135 from Odawara-Atsugi Road, Ishibashi IC

Parking Information
Fee
Free for guests
Parking time
---
Parking space
No restrictions
Number of parking spaces
40 cars available outdoor
Valet service
Unavailable
First-come, first-served basis. Reservation not available.

Pickup and drop-off information
Available (Free)Check-in: 15:00 - 18:00. Please call us upon your arrival at the station.
Check-out: 9:00 - 10:00.

Frequently Asked Questions

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