Pool
Exterior
Guest room
Restaurant
Kids' Space
221 photos

Grand Mercure Minamiboso Resort & Spa

Chiba Prefecture／Minamiboso City
¥11,400～
No meals ; 2 peopleTax included¥11,172〜
(USD 70.11)

Elegant Resort Stay Amidst the Sea and Nature│All-Inclusive Hotel

A nature-rich Resort Hotel surrounded by the sea and forest, located within the Minamiboso Quasi-National Park. With a kids' space available, we support family trips as a "Welcome Baby" Property. Enjoy the pleasant breeze, the sound of waves, and the scent of the sea at Daifuzan Cape. Relax and unwind in our spacious public bath. ■ Lounge access included in all guest rooms. Enjoy sparkling wine, red wine, white wine, beer, coffee, juice, herbal water, and other soft drinks, along with snacks. ■ "All-Inclusive" for a carefree stay. Our Hotel offers an all-inclusive experience, with the Accommodation Fee covering dinner, breakfast, drinks at the buffet restaurant and lounge, Onsen, and activities. From the soothing scents upon arrival to the local cuisine, activities, and more, immerse yourself in the natural beauty, culture, and traditions of the area throughout your stay. * Some drinks and activities are available for an additional fee. Lunch is not provided. * In addition to the all-inclusive (dinner and breakfast included), we also offer breakfast-included and early booking Plans.

3.96(771)
  • A Comfortable Summer Weekend

    We decided to visit an all-inclusive Hotel as a family, and the pool was another big draw, so we stayed here for one night. Our Room was on the top floor facing the ocean, and the view from the window was amazing. First, we went down to the rocky shore right below the Hotel to admire the beautiful sea, then had some fun in the pool before heading to the large public bath. After that, we enjoyed a beer in the lounge and went to dinner. The food was delicious, and we ended up drinking quite a bit.Breakfast on day two was also excellent. Even after checkout, we went back into the pool once more and took a shower before heading home. We fully enjoyed the all-inclusive plan and had a wonderful weekend. Thank you very much.

    キャンティ525 7/20/2026
  • Comfortable

    I stay here almost every year, and because it’s all-inclusive, I always have a comfortable visit. The Room is great, the large public bath is very relaxing, and the breakfast is so good I end up eating too much. The staff were also consistently pleasant and welcoming.This time it may have been because the hotel was busy, but when I checked in around 5:00 PM, only very early or very late breakfast time slots were available for the next morning. It would be helpful if guests could choose a breakfast time when making a Reservation.

    K06 7/13/2026

Facilities and Services

See All
  • Hot spring
  • Pet-friendly
  • Spa facility
Open-air bath / Large public bath / Sauna / Outdoor pool / Free shuttle service
IN15:00～24:00
OUT11:00
Number of rooms197 rooms
PetPermitted
Your childPermitted

Photo

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The Room type will be provided at check-in.

A paradise of sea and greenery right in front of you - A resort stay for families to enjoy│Onsen, sauna, free parking, lounge <No Meals Included>

IN 15:00～24:00
OUT 11:00
¥11,400～
No meals ; 2 peopleTax included¥11,172〜
(USD 70.11)

[Early Bird 60] A Paradise of Sea and Green Right Before You—A Family Resort Stay (Breakfast & Lounge Access Included)

IN 15:00～24:00
OUT 11:00
¥16,950～
Breakfast included ; 2 peopleTax included¥16,612〜
(USD 104.25)
Classic Semi Double

[Early Bird 60] A Paradise of Sea and Green Right Before You—A Family Resort Stay (Breakfast & Lounge Access Included)

IN 15:00～24:00
OUT 11:00
¥16,440～
Breakfast included ; 2 peopleTax included¥16,112〜
(USD 101.11)

[Early Bird 30] A Seaside and Green Paradise at Your Doorstep — A Resort Stay for Parents and Children (Breakfast & Lounge Access Included)

IN 15:00～24:00
OUT 11:00
¥16,980～
Breakfast included ; 2 peopleTax included¥16,642〜
(USD 104.44)
Japanese-style room
Japanese-style Room [With Lounge Benefits]
  • Japanese-style Room
  • 36㎡
  • Capacity 1~5 people

[Early Bird 60] A Paradise of Sea and Green Right Before You—A Family Resort Stay (Breakfast & Lounge Access Included)

IN 15:00～24:00
OUT 11:00
¥17,460～
Breakfast included ; 2 peopleTax included¥17,112〜
(USD 107.39)

[Early Bird 30] A Seaside and Green Paradise at Your Doorstep — A Resort Stay for Parents and Children (Breakfast & Lounge Access Included)

IN 15:00～24:00
OUT 11:00
¥18,060～
Breakfast included ; 2 peopleTax included¥17,700〜
(USD 111.08)

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Introduction of the Accommodation

Exterior

In front lies a paradise of sea and greenery, a resort stay for families to enjoy.

An upscale hotel suitable for both business and leisure. Grand Mercure South Boso Resort & Spa is located at Cape Taibusa within the South Boso National Park. The rich nature of the sea and forest welcomes guests. Cape Taibusa has been used as a capital defense fortress since the arrival of the Black Ships, and as such, this area, despite its proximity to the metropolitan area, is blessed with untouched nature.

Breakfast

Indulge freely with all-inclusive offerings.

The all-inclusive package includes dinner, breakfast, drinks and snacks in the lounge, access to the large public bath, and various activities. Enjoy your stay to the fullest from check-in to check-out. *Please note that some drinks and activities are available for an additional fee. Lunch is not provided.

Herb Water

All property guests can use it for free. A lounge to enjoy by the hour.

We offer a lounge available for all guests staying at our Property. In the lounge, we provide complimentary beverages such as sparkling wine, red and white wine, beer, coffee, tea, herbal water, and other soft drinks, along with snacks. The offerings vary depending on the time of day, so we encourage you to visit at different times to enjoy a variety of options.

Drink
Raku / Evening Social

A space that offers tranquility, comfort, and relaxation as you step into the Hotel. From 15:00 to 18:00 in the lounge, you can enjoy sparkling wine, red wine, white wine, beer, or non-alcoholic beverages such as coffee, tea, and herbal water. Spend special moments while envisioning your stay.

Whisky
A little / Nightcap

Savor a sophisticated evening before bedtime, experiencing the local history and culture in a single bite. Bar time is from 21:00 to 23:00. Relax with your favorite drink and local delicacies, reminiscing about your travels or sharing conversations with cherished companions.

Amazake
Onsen Lounge

At the "Onsen Lounge," you can relax in a serene space softly illuminated after your bath. Between 6:00-10:00 and 15:00-23:00, refresh your throat with a revitalizing vinegar drink and unwind on the sofa. In the evening, enjoy amazake, a traditional Japanese sweet drink.

Room

Guest room

A relaxing space to enjoy the warm maritime climate of Minami Bōsō.

Spacious guest rooms of over 36 square meters and the beautiful sea view from the rooms offer a journey filled with seasonal changes, the scent of the wind, and encounters with discoveries and emotions yet to be experienced.

Restaurant

Restaurant

Enjoy the blessings of nature and the seasonal flavors of the Minami Bōsō region in a buffet style.

Enjoy exquisite dishes made with local ingredients from Minami Bōsō in a buffet restaurant featuring elegant interiors and a sophisticated ambiance. Savor regional delicacies and create special travel memories through taste. Relax and unwind in a comfortable and tranquil setting.

Facilities and Equipment of Accommodation

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

Notice from the Accommodation

  • Outdoor Garden Pool

    Outdoor Pool Information: Saturday, July 18, 2026 – Wednesday, September 23, 2026

    A Summer Resort Perfect for Families with Children
    Make the most of your summer getaway.
    Because it’s summer, you want to play in the pool! Enjoy the open-air outdoor pool and soak up the fun. Exciting summer events will also be held!

    In 2026, the pool will be available until September 23.

    Operating period: July 18, 2026 (Sat) – September 23, 2026 (Wed)
    Hours: 9:00–17:00 *There is a 10-minute break once every hour.
    Reservation & fees: No Reservation required; pool access is included in your stay.
    Eligibility: Open to all guests.

    *Day-use access is not available.
    *You may use the pool before check-in and after check-out.
    *Children who are not yet toilet-trained must wear swim diapers.
    *Children of elementary school age or younger must be accompanied by a parent/guardian.
    *Operations may be suspended due to weather conditions.

    Campfire Experience
    Date: August 25, 2026 (Tue)
    Time: 19:00–20:00 (Please gather at the venue at 19:00)

    Planetarium Show
    Date: August 16, 2026 (Sun)
    Time: Around 19:00–20:00
    Capacity: 40 people / Reservation required

    Stargazing for Parents and Children
    Dates: August 22 (Sat), August 28 (Fri), August 29 (Sat), 2026
    Time: Around 19:45–20:15

    Starry Sky Terrace
    Relaxing chairs are set up by the poolside. Why not enjoy the beautiful hours from dusk into a star-filled sky?
    Setup period: August 1, 2026 (Sat) – Augusty31, , , , , , ,
    Event hours:: : : : : : :
    All events are included in our all-inclusive plan.


    Around15 around around around around around around around
    We will do our best to assist you as smoothly as possible; thank you for your understanding.
    *The Kids’ Corner “Play Area” (7::0000–23::0000) is also available before check-in and after check-out.

  • October | Peanut and Sweet Potato Harvest Every Sunday

    Kimura Peanuts will host a peanut and sweet potato harvesting experience at its own farm. Dig up peanuts and sweet potatoes grown under Tateyama’s sea breeze and sunshine with your own hands—an unforgettable way for both children and adults to connect with where food comes from.
    During the experience, you can take home up to 3 peanut plants and 5 sweet potatoes. Each group will also receive one Kimura Peanuts soft-serve ice cream voucher. Enjoy their popular rich peanut-flavored soft serve while taking in autumn in Minamiboso.


    Dates: October 4, 11, 18, and 25, 2026
    Fee: JPY 3,300 per group (tax included)
    Accommodation Guest Benefit: Early check-in (14:00) / Late check-out (12:00)
    Capacity: Up to 25 people
    Reservation Period: Until October 3, 2026 (phone reservations accepted until the day before if space is available)
    Inquiries: +81-470-33-3811
    Venue/Reception: Kimura Peanuts Inuishi Farm Field
    Address: 172-1 Inuishi, Tateyama City, Chiba — approx. 35 minutes by car from the Hotel *Please arrange your own transportation.
    Approx. 10 minutes by car from Kimura Peanuts Tateyama Store; parking available.

Basic Information

TaxesThe Hot Spring Tax for stays from January 5, 2025, onwards is included in the accommodation fee, so no payment for the Hot Spring Tax is required at the hotel.
Card information
VISA / MASTER / JCB / AMEX / DINERS
Pets
Permitted
※The following room types are "Pet-Friendly":※ Other room types do not allow pets to stay. ● Dog-Friendly Suite (Japanese-Western Style) with Ocean View ● Dog-Friendly Japanese-Style Room ● Dog-Friendly Western-Style Room Only dogs are allowed as pets. For more details, please refer to the Dog Agreement Form.
Breakfast■ Breakfast Buffet Enjoy local dishes perfect for the morning and over 60 carefully crafted menu items. Indulge in unlimited servings of our signature smoothies and champagne. Hours: 7:00 AM - 9:30 AM Price: ¥3,960 ■ Dinner Buffet Savor over 40 dishes, including specially selected local cuisine, for an elegant dining experience. Relish free-flowing beer, wine, and soft drinks to complement your meal. Hours: 5:30 PM - 9:00 PM Price: ¥8,690
Your child
You can stay.
Kids' play area available
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
7/18/2026~9/23/2026
Business Hours
09:00~17:00
Final admission time
---
Fee（Guest）
Free
Fee（Non-guest）
---
Children's pool
None
Age restriction
Pool shape
Irregular shape
Pool size


Water depth 40cm ～ 105cm
■Garden Pool / Included in the Accommodation fee [Operating Period] July 18, 2026 – September 23, 2026 The pool (9:00–17:00) is available before check-in and after check-out. Please use the complimentary baggage area (locker room) or the pool changing rooms for your luggage. * Rooms are available from 15:00. * Day-use is not available. * Operations may be suspended due to weather conditions.
Esthetic Massage
Available
Massage, etc.
Fitness gym
None
Public Bath
The number of Public Bath
2
Business Hours
06:00~23:00
Hot spring
None
Free-flowing
None
Milky hot spring water
None
Additional Information
Remarks
CLOSED 11:00 PM–6:00 AM / 10:00 AM–3:00 PM
Open-air bath
The number of Open-air bath
2
Business Hours
06:00~23:00
Hot spring
Available
Free-flowing
None
Milky hot spring water
None
Additional Information
(Heating, Adding Water)
Remarks
CLOSED 11:00 PM–6:00 AM / 10:00 AM–3:00 PM
Spring quality and benefits

Sodium-Chloride and Bicarbonate Hot Spring

SaunaAvailable
Hot stone spaNone
OthersThe following QR payment methods are available at the Hotel front desk: PayPay, auPAY, J-CoinPay, d Payment, Merpay, BankPay, AliPay+, WeChat Pay

Reviews

Overall Score
3.96
(771)
  • Rooms & Amenities
    3.76
  • Facility
    3.99
  • Hospitality & Service
    4.02
  • Meals
    3.96
  • Onsen & Bath
    4.14
  • Satisfaction
    3.88

*Reviews that have been translated from Japanese.*

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

Access Information

Address
Chiba Prefecture1212 Tadara, Tomiura-cho, Minamiboso City
TEL：+81-3-5539-2634

◆ Nearest Station: Tomiura Station (Chiba Prefecture) (10 minutes by car or taxi)

◆ Nearest IC: Tomiura IC (8 minutes by car)

Parking Information
Fee
Free for guests
Parking time
---
Parking space
No restrictions
Number of parking spaces
150 cars available outdoor
Valet service
Unavailable
For safety reasons, fireworks of any kind are strictly prohibited on the Hotel premises, regardless of whether they are brought in or their type. (As of 2024)

Pickup and drop-off information
Available (Free)For regular services, inquiries are required. Partial reservation system available.

Frequently Asked Questions

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