We introduce three unique facilities, including a rooftop pool and a lagoon pool. We suggest summer hotel stays that can be enjoyed in a style that suits you, whether you're traveling with family, a partner, or a group.

hotel MONday Group, operated by JHAT Co., Ltd. (Headquarters: Minato-ku, Tokyo; Representative Director: Akira Hirabayashi), is pleased to announce three hotel pools and special accommodation campaigns in the Maihama area for the upcoming summer travel season. "Premium hotel MONday MAIHAMA View I," which opened last December, "GRAND MONday Resort TOKYO BAY MAIHAMA," scheduled to open on July 18, 2026, and "Premium hotel MONday MAIHAMA View II," scheduled to open on September 11, each offer unique pools, restaurants, and large public baths. These hotels are perfect for family summer vacations, as well as trips with friends or as a couple, catering to a variety of travel styles.

A series of hotels are opening in the Maihama area, each with its own unique charm.
Choose from three hotel pools for a new Maihama stay this summer.

◆Swimming Pool: A summer oasis offering a sense of openness and relaxation.

Premium hotel MONday MAIHAMA View I

A rooftop pool where you can enjoy different views both day and night.

Our rooftop pool features an open-air day pool where you can play to your heart's content under the blue sky, and a night pool that transforms into a magical atmosphere with its lighting. You can enjoy it throughout the day, from splashing around with your family to relaxing with your partner or friends in the evening.

[Extended until August 31st due to popular demand!] Free pool access campaign for hotel guests only.

Guests staying with us until August 31, 2026 (Monday) can use the pool free of charge.
Furthermore, customers dining at K6 Restaurant for dinner will receive one freshly baked pizza free of charge.

Premium hotel MONday MAIHAMA View II

Enjoy a rooftop pool with a view

Located on the top floor of the hotel, the rooftop pool offers a relaxing atmosphere where you can enjoy the ever-changing views of Maihama throughout the day. Its charm lies in the fact that you can enjoy different expressions of the pool throughout the day, from the open air of the daytime to the beautiful sunset and the panoramic night view.

[Opening Celebration] Free Pool Access for Hotel Guests Only

Guests staying between September 11th (Fri) and October 12th (Mon/Holiday), 2026, can use the pool free of charge.

GRAND MONday Resort TOKYO BAY MAIHAMA

"MAIHAMA LAGOON" is a lagoon pool that can be enjoyed all year round.

Our outdoor lagoon pool, which adjusts its water temperature according to the outside temperature, can be enjoyed comfortably all year round. During the day, it's an open space bathed in sunlight; at dusk, it offers beautiful views of Tokyo Bay; and at night, it transforms into a magical night pool illuminated by lights.
Furthermore, the resort features a jacuzzi, a kids' pool with a depth of approximately 40cm where children can play safely, and a barrel sauna, allowing a wide range of guests, from families to couples, to enjoy a resort-like experience.

◆Restaurants: Each hotel offers a unique restaurant experience.

Premium hotel MONday MAIHAMA View I "GOOD PIZZA FACTORY K6"

At the hotel restaurant "K6," we offer freshly baked pizzas cooked in an authentic pizza oven. Enjoy the fragrant crust and chewy texture of this signature hotel dish, perfect for dinner after a day at the pool or theme park.

Premium hotel MONday MAIHAMA View II "Steak & Hamburg EDGE"

Our hotel restaurant, "EDGE," offers grilled dishes made with carefully selected ingredients from breakfast to dinner. Enjoy a relaxing time in a tranquil setting, perfect for meals with family and friends, or simply to enhance your hotel stay.

GRAND MONday Resort TOKYO BAY MAIHAMA Multinational Restaurant "ISLE - Pool Club Restaurant -"

This all-day dining restaurant offers international cuisine based on the concept of "enjoying food as if traveling the world." Together with the adjacent BBQ area, families and groups can enjoy a unique hotel dining experience.

◆Three hotels to choose from to suit your needs

Premium hotel MONday MAIHAMA View I

Our spacious rooms can accommodate up to six people, making them perfect for families, multi-generational trips, and group travel. We also have a large public bath and sauna, so you can relax and enjoy a comfortable hotel stay after a day at the theme park or pool.
Family service that makes even your first trip worry-free.
To ensure a worry-free stay for families traveling with young children, we offer rental equipment such as cribs, bed guards, toilet seat adapters, and step stools. Furthermore, we provide a full range of services to support family travel, including children's amenities and loungewear.

Premium hotel MONday MAIHAMA View II (Scheduled to open September 11, 2026)

The hotel offers suites that can accommodate up to 8 people and are approximately 75 square meters in size. Some rooms also feature kitchens equipped with grills from the high-end German kitchen brand "Gaggenau." The spacious rooms are comfortable for families with small children and groups traveling together. Furthermore, the hotel features a sauna supervised by "Sugoi Sauna," ensuring that guests can enjoy a truly comfortable stay.

GRAND MONday Resort TOKYO BAY MAIHAMA (Scheduled to open July 18, 2026)

As the first resort brand from hotel MONday Group, it boasts a variety of facilities, including oceanfront rooms, a year-round lagoon pool "MAIHAMA LAGOON," a barrel sauna, a large public bath supervised by "Sugoi Sauna," and a BBQ area. We propose a new style of stay in Maihama where you can enjoy a fulfilling time even without leaving the hotel.



Official website and reservations are available here.
New member registration/login reservations made through the official website are more advantageous!
① 10% OFF
② Early check-in at 2 PM

◆Supporting your summer travel plans! We're distributing "Summer Limited-Time Coupons"!

We are currently offering limited-time coupons that will allow you to enjoy your summer travels at even better prices.
This is a great opportunity to get 10% off hotel-type accommodations and 15% off apartment-type accommodations. (Excludes some facilities and plans)
This press release introduces "Premium hotel MONday MAIHAMA View I "Premium hotel MONday MAIHAMA View II The coupon is also valid for this hotel, and when combined with the official member discount plan, you can stay at the hotel for up to 25% off (※" GRAND MONday Resort TOKYO BAY MAIHAMA" is excluded).

・Reservation period: Until July 31, 2026 (Friday)
• Applicable stay period: Until September 30, 2026 (Wednesday)

For further details, please check the official website below.

Great deal! Summer limited-time coupon

◆ Enjoy even more savings on your hotel stay with our official membership program.

hotel MONday Group offers an official membership program to enhance your stay and provide you with great value. From the day you register, you can enjoy a variety of benefits, including member-exclusive rates on accommodations. (Membership is free of charge.)

This summer, enjoy a special hotel stay by making reservations through our official website and taking advantage of member benefits.

[Special benefits for official members only]
- We will provide complimentary bottled mineral water for each person upon check-in.
- Early check-in at 2 PM
- Special limited-time plans and coupons are offered via email newsletter.
・We will deliver information on other newly opened facilities, events, and other great deals.

Furthermore, your membership rank will increase based on the number of stays you have. After two stays, you will be upgraded to "Gold Member," which entitles you to a 13% discount on your next reservation! As your rank increases, you will receive even higher discounts and a wealth of exclusive benefits.

[Membership rank and discount rate]
Regular members (first and second visits): 10% OFF
Gold Members (those using the service 3 or 4 times): 13% OFF
Platinum members (those who have used the service 5 or more times): 15% OFF

GRAND MONday Resort TOKYO BAY MAIHAMA Press Preview

JHAT Co., Ltd.

【 本プレスリリースに関するお問合せ先 】
株式会社 JHAT　 担当：風岡
TEL：03-6453-0144
FAX：03-6453-0954
メール：promotion_gp@jhat-m.com
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