Example within the Facility
Example of a Guest Room
Example of Bath
Example within the Facility
Facility example
84 photos

Oiso Prince Hotel

Kanagawa Prefecture／Oiso
¥20,700～
No meals ; 2 peopleTax included¥18,216〜
(USD 115.10)

Enjoy sports activities, Onsen, and more, starting with Oiso Long Beach.

The extraordinary spa facility for adults, "THERMAL SPA S.WAVE," has been born! Experience your own THERMAL TRIP, a "journey" that guides you to a sauna trance while feeling the sway by changing positions, postures, temperature, and humidity. *For more details, please see "Facility Announcements" at the bottom of the page. 45 minutes by car from Tokyo. Surrounded by the scent of the sea and the bright sunshine of Shonan, Oiso Prince Hotel (Oiso Purinsu Hoteru) was renewed and reopened in July 2017. Enjoy a sports resort with attractions such as the water paradise "Oiso Long Beach," tennis, golf, bowling, and futsal. It can be used for various occasions throughout the year.

4.21 - Good(104)
  • We made another wond...

    We made another wonderful summer memory.The service, the cleanliness of the Facility, and the meals were all excellent. We would love to stay again. Thank you very much.

    ff.f 8/5/2026
  • We had a wonderful vacation.

    I found a great deal at the last minute and made a Reservation.I’ve stayed at this Hotel countless times, but this time my main purpose was to use the spa rather than the adjacent Long Beach. For an additional fee, I was able to enjoy the pool and sauna before check-in with hardly anyone else around, then moved on early to the Onsen and relaxed there as well. The showerheads had also been replaced with ReFa ones, which made me very satisfied overall, but unfortunately the installed hair dryers were from another brand.I heard that ReFa hair dryers were available in the men’s bath area, so I hope they will be updated going forward.The in-room hair dryer was a ReFa product.I’m extremely happy that I could relax this much during peak season. I’d love to stay again next summer as well.

    雲母ちゃん 8/8/2026

Facilities and Services

See All
  • Hot spring
  • Spa facility
Open-air bath / Large public bath / Sauna / Ganbanyoku (rock bathing) / Within a 5-minute walk to the convenience store. / Outdoor pool
IN15:00～24:00
OUT11:00
Number of rooms305 rooms
PetNot allowed
Your childPermitted

Photo

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Mountain View Twin
Mountain Twin 【Non-Smoking/2 Beds】
  • Twin
  • 19㎡
  • Capacity 1~2 people

【Value Rate】 (Room Only / Spa Extra Charge)

IN 15:00～24:00
OUT 11:00
¥20,700～
No meals ; 2 peopleTax included¥18,216〜
(USD 115.10)

Reward Yourself with a Stay at Shonan Spa (Room Only / Includes Spa Access)

IN 15:00～24:00
OUT 11:00
¥23,700～
No meals ; 2 peopleTax included¥20,856〜
(USD 131.78)
Premium Mountain View Twin

【Value Rate】 (Room Only / Spa Extra Charge)

IN 15:00～24:00
OUT 11:00
¥22,880～
No meals ; 2 peopleTax included¥20,144〜
(USD 127.28)

Reward Yourself with a Stay at Shonan Spa (Room Only / Includes Spa Access)

IN 15:00～24:00
OUT 11:00
¥25,880～
No meals ; 2 peopleTax included¥22,784〜
(USD 143.97)
Ocean View Twin Room for up to 4 guests (based on 2-person occupancy)

【Value Rate】 (Room Only / Spa Extra Charge)

IN 15:00～24:00
OUT 11:00
¥29,850～
No meals ; 2 peopleTax included¥26,274〜
(USD 166.02)

Reward Yourself with a Stay at Shonan Spa (Room Only / Includes Spa Access)

IN 15:00～24:00
OUT 11:00
¥32,850～
No meals ; 2 peopleTax included¥28,914〜
(USD 182.70)

Best-Selling Stays

Free Accommodation For Child Sharing Existing Bedding

Accommodation In Top-Ranked Tourist Areas

Accommodation With Easy Airport Access

Accommodation With Sofa In Guest Room

Introduction of the Accommodation

Guest Rooms
Scenery
Interior
Interior View
Onsen
Guest Rooms
Scenery
1 hour from the city center, 360˚ of openness

A casual resort with the charm of being just about an hour away from the city center, where the sky and sea stretch out before you. Experience deep relaxation enveloped in breathtaking views, with an outstanding sense of openness and a modern, borderless space. At the Onsen and spa facility "THERMAL SPA S.WAVE," you can enjoy deep relaxation with features like a heated infinity pool that feels one with the sea, a variety of saunas, and Oiso Onsen. This Resort Hotel invites you on a journey away from everyday life, just about an hour from the city center. Sports facilities and the leisure pool "Oiso Long Beach" are also open during the summer.

Guest Rooms
Guest Rooms
Guest Rooms
Guest Rooms
Guest Rooms
Guest Rooms
Guest Rooms
Guest Rooms
Guest Rooms
Guest Rooms
Room

All rooms have been newly renovated and reopened. We offer a total of 8 types of rooms. Please enjoy your stay in various scenes, such as rooms with ocean views or rooms overlooking mountains and cityscapes.

Example of Meals
Dining
Example of Meals
Dining
Example of Meals
Dining
An open dining area with large windows overlooking the garden and the Pacific Ocean.

A space where you can feel the time, scenery, and flow of the wind with nature unfolds on the expansive garden terrace. On sunny days, you can enjoy your meals in the garden, surrounded by vibrant greenery, the blue horizon, and the sea breeze. At the Chinese restaurant "滄" (Sou), you can savor a variety of dishes that retain the traditional flavors of Chinese cuisine while being modernly arranged.

Infinity Pool
Unleash the Infinity BAR

The thermal terrace and Fuji terrace on the 4th floor of "THERMAL SPA S.WAVE" extend alongside the infinity pool. The setting sun over the mountains paints the vast sky with a picturesque gradient. Immerse yourself in this space and experience deep relaxation for both body and mind, with a seasonal cocktail in hand, whether it's a deep breath of spring or a cool summer evening.

Sauna
A space to rejuvenate your mind and body with an experiential sauna.

"THERMAL SPA S.WAVE" offers a variety of facilities that even beginners and those who are not fond of saunas will want to experience, including a sauna that promotes meditation with the scent of aroma, an ice sauna with falling snow, and a panoramic sauna where you can enjoy breathtaking views of the sea and Mount Fuji. After refreshing both mind and body with the experiential hot and cold alternating baths, which can be enjoyed by both men and women together in swimwear, you can relax in the natural Onsen while overlooking the Pacific Ocean.

Example of Meals
A photogenic dining experience overlooking the garden and the Pacific Ocean.

At "S.DINING," where a green garden stretches out before you and you can see the horizon of the Pacific Ocean, you can enjoy a semi-buffet with delightful buffet-style appetizers and desserts, and choose your main dish from the menu. Additionally, the stylish and cute sweets that change themes each season are a highlight of the popular afternoon tea.

Scenery
Refresh with sports surrounded by the sea and greenery.

Enjoy a short golf course where you can savor the charm of the sea and mountains while playing, or refresh both your mind and body with sports like tennis on courts where the fresh sea breeze feels delightful. Indoor facilities such as bowling are also well-equipped, allowing for casual enjoyment.

Facilities and Equipment of Accommodation

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

Notice from the Accommodation

  • Notice of Oiso Long Beach Operations for the 2026 Season

    Experience the exhilarating rush of a 140 m waterslide—so thrilling you’ll be hooked after just one ride.
    Enjoy a wide variety of pools with views over Sagami Bay.

    “Oiso Long Beach”

    Open from Saturday, July 4, 2026.

    Hours: Dates
    July 4 (Sat), 2026 – September 13 (Sun), 2026
    Hours
    9:00 A.M. – 5:00 P.M.
    On the following dates, hours will be 10:00 A.M. – 5:00 P.M.:
    • July 6 (Mon) – July 10 (Fri)
    • July 13 (Mon) – July 17 (Fri)
    • September 1 (Tue) – September 4 (Fri)
    • September 7 (Mon) – September 11 (Fri)

    ■ Admission Fees
    Oiso Long Beach has introduced variable pricing starting from the 2024 season.
    Admission fees vary by date, so please check the applicable fee before purchasing.

    *Please note that operations and services may change depending on conditions.*
    *For details, please visit the official Oiso Long Beach website.*

Basic Information

TaxesFrom July 15, 2017, a Hot Spring Tax of 150 yen per night will be charged. Children under 12 years old are exempt from the tax.
Card information
VISA / MASTER / JCB / AMEX / DINERS
Pets
Not allowed
BreakfastEnjoy a Japanese and Western buffet breakfast.
Your child
You can stay.
Children aged 5 and under can stay with Child Sharing Existing Bedding. Additionally, baby cots are available depending on the room type. * At Oiso Onsen, children who are not yet toilet-trained are not permitted to use the facility. * The spa facility "THERMAL SPA S.WAVE" requires swimwear in its spa floor area. (Except on specific days, children under 12 years old are not allowed to use this area.)
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
Outdoor pool
Available period
7/5/2025~9/15/2025
Business Hours
09:00~17:00
Final admission time
16:30
Fee（Guest）
Paid ¥2,450
Fee（Non-guest）
Paid ¥4,900
Children's pool
Available
Age restriction
Height restrictions apply depending on the facility.
Pool shape
Irregular shape
Pool size
Length 500m
Width 10m
- Oiso Long Beach Operation Operating Period: July 5, 2025 (Saturday) – September 15, 2025 (Monday) Operating Hours: 10:00 A.M. – 5:00 P.M. *From July 12 (Saturday) to September 7 (Sunday), hours are from 9:00 A.M. – 5:00 P.M.* Oiso Long Beach admission fees have adopted a dynamic pricing system starting from the 2024 season.
Esthetic Massage
Available
Fitness gym
None
Public Bath
The number of Public Bath
2
Business Hours
06:00~24:00
Hot spring
Available
Free-flowing
None
Milky hot spring water
None
Additional Information
(Heating, Adding Water)
Remarks
A Hot Spring Tax of 150 yen per night will be applied. (Children under 11 years old are exempt from this tax.) * At Oiso Onsen, children who are not yet potty-trained are not permitted to use the facility. * The spa facility "THERMAL SPA S.WAVE" is a swimwear-required area on the spa floor. (Children under 12 years old are not allowed to use this area.)
Open-air bath
The number of Open-air bath
2
Business Hours
06:00~24:00
Hot spring
Available
Free-flowing
None
Milky hot spring water
None
Additional Information
(Heating, Adding Water)
Remarks
A Hot Spring Tax of 150 yen per night will be applied. (Children under 11 years old are exempt from this tax.) * At Oiso Onsen, children who are not yet potty-trained are not permitted to use the facility. * The spa facility "THERMAL SPA S.WAVE" is a swimwear-required area on the spa floor. (Children under 12 years old are not allowed to use this area.)
Spring quality and benefits

Sodium-Calcium Chloride Strong Saline Spring Hypertonic, Weakly Alkaline, Cold Mineral Spring

Rheumatoid arthritis, osteoarthritis, lower back pain, neuralgia, frozen shoulder, bruises, sprains, cold sensitivity, peripheral circulation disorders, fatigue recovery, and more.

SaunaAvailable
Hot stone spaAvailable
OthersPlease make sure to check the Oiso Prince Hotel homepage for Facility information. Entry to Oiso Long Beach and THERMAL SPA S.WAVE is prohibited for individuals associated with organized crime groups, or those with tattoos, body art, or similar markings. If such individuals are found within the premises, they will be asked to leave in accordance with Facility usage regulations. This policy also applies to items like sticker tattoos or similar decorations. These rules apply regardless of age. No refunds will be provided under any circumstances in such cases.

Reviews

Overall Score
4.21
Good (104)
  • Rooms & Amenities
    3.94
  • Facility
    4.24
  • Hospitality & Service
    4.13
  • Meals
    4.35
  • Onsen & Bath
    4.37
  • Satisfaction
    4.24

*Reviews that have been translated from Japanese.*

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

Access Information

Address
Kanagawa Prefecture546 Kokubunji, Oiso-machi, Naka-gun
TEL：+81-463-61-1111

■ By Car
- 2 km (approximately 5 minutes under normal conditions) from Oiso I.C. on the Odawara-Atsugi Road via Atsugi I.C. on the Tomei Expressway.
- 1 minute from Oiso-Nishi I.C. on the Seisho Bypass.

■ By Train
- 7 minutes by taxi from JR Tokaido Line Oiso Station (approximately ¥1,300).
- 5 minutes by taxi from Ninomiya Station (approximately ¥1,000).
- A local bus operates between JR Oiso Station and the Hotel (12 minutes under normal conditions, ¥200).

*From November 16, 2025 (Sunday), "Iso07: Oiso Station ⇔ Oiso Prince Hotel" will operate only on weekends and holidays.*
*For weekdays or times when "Iso07" is not in service, please use "Hei47" or "Iso13" to access the bus stop at "Oiso Prince Hotel Entrance."*

Parking Information
Fee
Parking fee per night for guests ¥1,000
Parking time
1 night
Parking space
No restrictions
Number of parking spaces
200 cars available outdoor
Valet service
Unavailable

Pickup and drop-off information
Unavailable

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