Choosing a room at Grand Nikko Tokyo Bay Maihama trips most people up on the same point: the floors. Nikko Floor, Rainbow Floor, and Garden Floor — three names that show up on the official site without much explanation of which one actually fits you. For this guide, I stayed in the "Nikko Gran Family Room," a room that sleeps up to five, on the top-tier Nikko Floor.
I'll first break down the differences between the three floors along with the full room-type lineup, then walk through my actual stay in Room 1122 (11th floor, Type A) — from the entrance to the bed to the bathroom — with plenty of photos.
The Three Guest Room Floors at Grand Nikko Tokyo Bay Maihama
Rooms are split into three types by floor: the Garden Floor (4F–6F), Rainbow Floor (7F–10F), and Nikko Floor (11F–12F). Service generally gets more premium as you go up, so picking with the floor in mind helps avoid disappointment.
Nikko Floor: The Premium Stay
Source: Official Site
The Nikko Floor is where you get the hotel's most premium service. There's a dedicated check-in counter, and quiet is well maintained throughout. The palette leans beige and brown for a calm feel, and the upper-floor views are a real draw. Staying here also comes with free access to the "Nikko Lounge" on the 12th floor — a major perk.
| Room Type | Size |
|---|---|
| Nikko Standard Room | 28m² |
| Nikko Superior Room | 32m² |
| Nikko Deluxe Room | 40m² |
| Nikko Deluxe Family Room | 56–64m² |
| Nikko Gran Family Room | 85m² |
| Junior Suite | 64m² |
| Executive Suite | 80m² |
| Deluxe Suite | 100m² |
The Nikko Floor is a good fit if you:
- Want to unwind in a calm, quiet atmosphere
- Are looking for a premium space with fuller service
- Want to make use of the Nikko Lounge too
Rainbow Floor: A Colorful Take
Source: Official Site
The Rainbow Floor is built around two design themes: an ocean-and-water motif called "the Aqua," and a sun-and-light motif called "the Shine." the Aqua pairs well with seaside-facing rooms, and the Shine with park-facing rooms — both lean into an out-of-the-ordinary feel.
| Room Type | Size |
|---|---|
| Rainbow Standard Room | 28m² |
| Rainbow Superior Room | 32m² |
| Rainbow Deluxe Room | 40m² |
| Rainbow Deluxe Family Room | 56m² |
The Rainbow Floor is a good fit if you:
- Want to be soothed by ocean and water imagery (the Aqua theme)
- Want to feel sunlight and warmth in your room (the Shine theme)
- Are looking for a space that feels a bit out of the ordinary
Garden Floor: Surrounded by Greenery
Source: Official Site
The Garden Floor is lined with bright rooms themed around flowers and greenery. It's a calm space that lets you forget the bustle of the city, with a good variety of room types including Japanese-Western style and Universal rooms. Of the three floors, this one generally offers the most budget-friendly rates.
| Room Type | Size |
|---|---|
| Garden Standard Room | 28m² |
| Garden Superior Room | 32m² |
| Garden Deluxe Room | 40m² |
| Garden Deluxe Family Room | 56m² |
| Japanese-Western Style Room | 64m² |
| Universal Room | 32m² |
The Garden Floor is a good fit if you:
- Want to relax surrounded by nature and greenery
- Like the idea of a modern Japanese-style stay
- Want a comfortable stay while keeping costs down
My Stay Report: The Nikko Gran Family Room
Of the eight room types on the Nikko Floor, I stayed in the Nikko Gran Family Room. While most rooms here cap out at four guests, this one is a family-oriented room that sleeps up to five.
📣 Shin
A lot of rooms only sleep four, so this one felt like a real find for a family trip.
| Capacity | 4–5 guests |
| Size | 85m² |
| Beds | Five permanent Simmons-brand beds, 140cm wide; Hollywood twin layout available on request |
| Floor | 11F–12F (Nikko Floor) |
| Room count | Equivalent to two standard rooms combined |
| View | All rooms face the Tokyo Bay area |
Two Layouts: Type A and Type B
The Nikko Gran Family Room comes in two layouts. Type A has a wide, rectangular entrance door, and both of its two bathrooms have doors for privacy. Type B is the same 85m² but built on a diagonal layout. I stayed in a Type A room on the 11th floor.
Type A｜Source: Official Site
Type B｜Source: Official Site
Entrance
It's a double-door family room — genuinely useful for moving large luggage in and out, and easy to navigate with a stroller or wheelchair. I stayed in Room 1122 on the 11th floor.
The entryway is spacious enough that even a big suitcase doesn't get in the way.
The closet has plenty of space too.
A Comfortable Sofa
The sofa in the Nikko Gran Family Room has a modern design with soft curves. Comfortable to sit in, it sits by a large window with a view over Tokyo Bay.
Comfortable Sleep for a Family of Five
The bed and headboard have an elegant, understated color scheme, with a purple-to-pink gradient on the wall and a subtle star pattern as an accent.
The beds are made up neatly with crisp white linens.
A Breathtaking View
The view from the Nikko Gran Family Room stretches out to the horizon, blue sea meeting blue sky. Seen from the room's calm interior, it's a quietly exhilarating view.
The view from the balcony takes in the full sweep of Tokyo Bay, the blue water and distant skyline forming a striking contrast on a clear day.
Two Bathrooms, Built for Convenience
With more people in a room, bathroom timing can get tricky — having two separate bathrooms in the Nikko Gran Family Room genuinely helps.
Bathroom next to the vanity
The bath and toilet are kept separate here.
Bathroom by the entrance
A Well-Equipped Vanity Room
The vanity and changing area is spacious, with two sinks — a real plus for a family with several women getting ready at once.
A Spacious Bath for Real Relaxation
The bathroom is set on the left side of the room, with the shower and bathtub kept separate — genuinely convenient for a family. The spacious layout is also great for households with small children.
You can take in the view of Tokyo Bay right from the bathtub.
There's also a fully separate shower room.
In-Room Amenities That Make the Stay Easier
Security: Using the Safe
A safe is built into the room, so I'd recommend storing your valuables there.
Coffee Time: The Drip Pod
📣 Shin
On the Nikko Floor, though, you don't really need to brew your own — the lounge has plenty of drink options, so I skipped using it this time.
The free lounge available only to Nikko Floor guests, with menus by time slot and how to use it.
Refrigerator
The bottled water on the door was left in the room; the iced tea we bought ourselves.
A Big Screen TV
The large TV in the Nikko Gran Family Room is just the right size for the whole family to enjoy a movie or show together, with a sharp, high-resolution picture.
Air Purifier
With up-to-date filtration, it effectively cuts down on pollen and dust — reassuring if you're traveling with allergy sufferers or small children.
Amenities
The room comes with thoughtful little touches like a quality hairbrush, razor, and a cotton pad and swab set.
Every Mikimoto amenity, what's okay to take home, and kids' rental items.
Frequently Asked Questions
Rooms are split across three floors. The Garden Floor (4F–6F) has bright rooms themed around flowers and greenery; the Rainbow Floor (7F–10F) offers two designs, ocean-themed "the Aqua" and sun-themed "the Shine"; and the Nikko Floor (11F–12F) is the top-tier floor with private lounge access.
If you want a special-occasion feel and lounge access, go for the Nikko Floor. For a family of 4–5, the Nikko Gran Family Room is a strong pick. If you're watching your budget, a Standard Room on the Garden Floor is also worth considering. It's also worth comparing against the rooms at Fantasy Springs Hotel, in the same Maihama area.
Room rates vary considerably by season, floor, and room type, so there's no single fixed price. For the most accurate current rates, checking the official site or a travel booking site directly is your best bet.
Standard Rooms typically sleep 2–3 guests, Deluxe Family Rooms around 4, and the Nikko Gran Family Room up to 4–5. Choose your room type based on your group size.
Guest Reviews
The Nikko Gran Family Room was even more spacious than I expected — our family of five had plenty of room to spread out.
The purple-to-pink gradient wall was elegant and very photogenic. The night view was beautiful too.
Having two toilets really helped — mornings didn't turn into a scramble, which is exactly what you want from a family room.
Being able to see Tokyo Bay from the bathtub exceeded my expectations. Evening is a especially good time for it.
Even small details like the air purifier and the big TV were well thought out — made for a really comfortable stay.
With room for up to five, the per-person cost felt genuinely reasonable.
With so many floor-and-room-type combinations, I wasn't sure which to book. → Comparing the room-type table for each floor before booking makes it much easier to choose.
I hardly touched the in-room coffee maker. → If you're on the Nikko Floor, the lounge covers drinks well, so minimal in-room use is totally fine.
Summary: Rooms at Grand Nikko Tokyo Bay Maihama
The fastest way to choose a room at Grand Nikko Tokyo Bay Maihama is to start with the difference between the Garden, Rainbow, and Nikko floors. The Nikko Gran Family Room I stayed in delivered on size, view, and facilities across the board — a great fit for a family trip. I hope this helps as you plan your own stay.
See how the rooms and booking difficulty compare at Fantasy Springs Hotel, in the same Maihama area.
▶ Check Rates on Rakuten Travel
| Want the full overview first | Main Guide |
| Deciding between room types | Rooms (Nikko Floor) |
| Curious about the free lounge | Lounge |
| Trying to pack light | Amenities |
| Want to avoid breakfast crowds | Breakfast Buffet |
| Need to pick up something you forgot | Convenience Store & Souvenirs |
