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Official advance reservation [Summer vacation special plan] Free for children under elementary school age! All-inclusive pool, shaved ice, and craft experience!
![[Official Advance Reservation] Recommended for traveling with children [Children under elementary school age] Summer vacation! Let's go with my family to Minami Boso!](https://grand-mercure-minamiboso-resortandspa.jp/en/wp/wp-content/uploads/2025/05/pool_34169695-1600x1067.jpeg)
Summer vacation! Let's go with my family to Minami Boso!
Elementary school students and younger (7-12 years old) are free with the special code on this page!
Why don't you enjoy nature and fun experiences in Minami Boso, which is perfect for family trips during summer vacation?
With the official-only special treatment code, we offer benefits that children under elementary school age can be free! You can enjoy making memories with the whole family at great value.
The pool is also all-inclusive only in summer! Enjoy the indoor kids corner from check-in to after-out!
Local Discovery (work experience) is also a glittering item using marine plastic! Summer vacation to learn and enjoy.
There are also a lot of events (paid) such as night tours with limited dates!
There is a quasi-national park around the hotel, and beach combing where you can enjoy the feeling of treasure hunting on the beach.
Exciting summer vacation while feeling the resort of the sea, sky and forest full of liberation!
How to make a reservation
Click to display large.
Please make a reservation from the dedicated reservation page.
A special treatment code is required to book this plan.
Special treatment code: 「GMB01」
On the page displayed from the "Display and perform the following operations" button below.
Please enter the special treatment code / number of children etc.
Reservation method (reservation using smartphone)
STEP①
Tap "Edit" at the top right of the dedicated reservation page, select the desired date of stay, and tap "Confirm XX night".
[Accommodation period] From July 19 (Sat) to August 31 (Sun), 2025 to check-in
STEP②
Tap "How many people are you?" on the same screen as STEP 1, and enter the number of adults / children and age.
*Up to 4 people per room
STEP③
On the same screen, enter the "Special Discount Code" in the "Special Discount" and tap "Search".
Special treatment code: GMB01
STEP④
When the "Special Promotion" is displayed, tap "View Hotel".
STEP⑤
From the room where "Special Promotion" is displayed
Select this plan, tap "Continue" and proceed with your reservation.
Reservation method (reservation on PC)
STEP①
Select the desired date of stay on the dedicated reservation page.
[Accommodation period] From July 19 (Sat) to August 31 (Sun), 2025 to check-in
STEP②
Enter the number of adults/children and age
*Up to 4 people per room
STEP③
Enter the "Special Offer Code" in the "Special Rate"
Special treatment code: GMB01
STEP④
When the "Special Promotion" is displayed, click "View Hotel".
STEP⑤
From the room where "Special Promotion" is displayed
Select this plan, click "Continue" to proceed with your reservation.
Overview of the Plan
- Reservation period
- June 4 (Wednesday) to June 25 (Wednesday), 2025
※Reservations outside the reservation period are not accepted.
※This plan is subject to termination or change without notice. - Accommodation Period
- From July 19 (Sat) to August 31 (Sun), 2025 to check-in
- Meal
- With evening breakfast for one night
All-inclusive - Room
- A lineup recommended for family trips where 4 people can stay in one room.
・superior Twin (renewal in 2024)
・Standard twin
・Classic twin
・Japanese-style room
※The view cannot be specified. - Target age
- 7-12 years old
※Up to 2 people
※Free of charge under 6 years old
※If the reservation exceeds the capacity of the room (4 or more people), the child will be sleeping together. - Attention
- Reservations from other than the official website are not eligible. Thank you for your understanding.
- Access
- [Car] About 8 minutes from Tomiura I/C on the Futtsu Tateyama Expressway
[Express buses and trains] Tomiura Biwa Club at JR Tomiura Station ※Confirmation of pick-up
Summer vacation experience SIGHTSEEING・ACTIVITIES
The outdoor pool is also all-inclusive
Business period: From 7/19 (Sat) to 8/31 (Sun)
Time: 9：00～17：00
You can use it before check-in and after check-out.
Please also use the free locker and changing room.
Click here for more information.
Summer-only shaved ice is also all-inclusive!
Business period: From 7/19 (Sat) to 8/31 (Sun)
Please contact the front desk on the day of the event for details.
Indoor kids corner where you can feel safe even in the rain
You can enjoy it before check-in and after check-out! Don't worry even if it rains. Please use it according to your child's mood.
Beach combing with a sense of treasure hunting on the beach
Cape Ofusa in Minami Boso is a spot where the beautiful coastline and rich nature are attractive. While enjoying the beautiful sea and nature unique to Cape Ofusa, there are many unexpected discoveries! It's a fun experience for both children and adults to get hooked.
Local Discovery (craft experience)
Business period: From 7/19 (Sat) to 8/31 (Sun)
Time: 9：00～12：00
Let's make sparkling items using marine plastic waste!
Summer vacation to enjoy learning about environmental issues.
※Items may be different.
Summer vacation event
There are plenty of summer vacation events limited to the day!
Enjoy the sea and nature and make memories of summer vacation.
Click here for more information.
Buffet
There is also a corner where children can enjoy at the dinner buffet!
Colorful donuts are very popular with children!
Starry sky observation
A number of stars that blink in the summer starry sky.
Let's look up at the shining stars!
※Please contact us at the hotel for the date and time of the event.
Observation of insects
Recommended for free research!
Let's look for insects in the forest and observe them.
Grand Mercure Minamiboso Resort & Spa accommodation reservation