GRAND MONday Resort Tokyo Bay Maihama opens on July 18, 2026 in the Chidori waterfront district of Urayasu — the first flagship of the new “GRAND MONday Resort” brand by hotel MONday Group (JHAT Co.). All 140 rooms face Tokyo Bay, officially billed as “the only all-oceanfront hotel in Maihama.” The headline feature is MAIHAMA LAGOON, an outdoor lagoon pool open 365 days a year with temperature-controlled water, plus a barrel sauna, jet bath, kids pool, and poolside BBQ. A large public bath and a magma-spa-style sauna complete the “the stay is the destination” concept. This review is based on pre-opening public information; prices and hours are estimates and may change.
Basic Information
| Item | Details |
|---|---|
| Address | 15-9 Chidori, Urayasu, Chiba 279-0032 |
| Phone | 047-353-2525 (weekdays 9:00–18:00) |
| Area | Chidori waterfront (Upscale resort, no TDR designation) |
| Rooms | 140 (all oceanfront) |
| Check-in / Check-out | 15:00 (14:00 for official members) / 12:00 |
| Opens | July 18, 2026 |
| Official Website | hotel-monday.com (EN) |
Best For
- Guests who want a resort stay, not just a park base — Year-round outdoor lagoon pool + barrel sauna + large bath + magma-spa sauna is a combination no other Maihama-area hotel offers
- Families and groups who want bay views — Every room faces Tokyo Bay; rooms sleep 4–6 (25–51 sqm); suites include a washing machine
- Guests who want brand-new 2026 facilities — Newly built quality throughout; free Wi-Fi and AI translation devices; Muslim-friendly services
May Not Suit
- Guests who need Happy Entry early admission — Not a TDR-affiliated hotel; the perk does not apply
- Guests who prioritize station access and frequent shuttles — Free shuttle to Maihama Station runs 1–2 times per hour (6:00–23:00, ~7–9 min); walking to the station is impractical (taxi ~9 min)
- Guests who want settled, proven operations — Just opened; rates and services may shift. Check the official site before booking
Access
To the Parks (TDL / TDS)
Free shuttle between the hotel and Maihama Station (South Exit stop C-3), about 7–9 minutes, 1–2 departures per hour (6:00–23:00), then the Disney Resort Line to the parks. Happy Entry does not apply.
To JR Maihama Station
Free shuttle (~7–9 min). Alternatively Keisei Bus route 20 (Chidori loop) to “Chidori-Nishi,” a 1-minute walk from the hotel. Taxi ~9 minutes.
To the Airport
No dedicated limousine stop. Use limousine buses from Maihama Station (Haneda ¥1,300) or trains via Tokyo Station.
To Central Tokyo
From Maihama Station, about 15–20 minutes to Tokyo Station on the JR Keiyo Line.
Map
Facilities & Services
MAIHAMA LAGOON (year-round outdoor pool) Temperature-controlled outdoor lagoon pool open 365 days a year, with barrel sauna, jet bath, kids pool, and poolside BBQ area. Hours and conditions on the official website.
Large Bath & Magma-Spa Sauna A large public bath plus a magma-spa-style sauna using Mt. Fuji lava plates, supervised by the “Sugoi Sauna” team. Note: not a natural hot spring.
Guest Rooms (140 rooms, all oceanfront) From Superior Twin (25.44 sqm, 4–5 guests) to Suites (50.88 sqm, 6 guests, in-room washer). Top-floor VIP suite guests get lounge access. Free co-sleeping service for small children.
Restaurant / Parking / Wi-Fi All-day dining “ISLE -Pool Club Restaurant-” (planned 6:30–24:00) plus room service (last order 24:00). Limited on-site parking at ¥3,000/night (partner lot with free shuttle when full). Free Wi-Fi in all rooms; AI translation devices available.
Local Notes
GRAND MONday Resort positions itself as a destination in its own right, not a place you merely sleep between park days. No other hotel in the Maihama area operates an outdoor pool year-round, and the pool + barrel sauna + large bath + magma-spa sauna lineup is genuinely unique here. For natural hot springs, Spa & Hotel Maihama Eurasia remains the area’s only option — but for “pool and sauna” recovery, this hotel stands alone.
The trade-offs: it sits in the Chidori waterfront zone, the shuttle runs only 1–2 times per hour, and no TDR park perks apply. It suits a “second day at the hotel” itinerary far better than a rope-drop-focused one. As a newly opened property, confirm the latest rates and services on the official site before booking.
Price Guide
From around ¥19,000 for two guests per night (newly opened; expect wide fluctuation). Check the latest availability and rates on booking sites.