Daiwa Roynet Hotel Nishi-Shinjuku PREMIER

Hotel · Kyobashi

The 52 sqm Junior Suite officially sleeps four and is the only room type allowing extra beds and a baby crib, a short walk from Tokyo and Ginza.

✓ The Junior Suite is officially bookable for up to 4 guests.

Worth knowing: Just one four-person room category, so availability is tight; other rooms cap at two to three.

Apartment hotel · Higashi-Shinjuku / Kabukicho

A larger-room value hotel one minute from Higashi-Shinjuku Station whose 24 sqm Corner Twin rooms sleep up to four with a sofa bed, plus in-room fridges and self-service coin laundry, and the hotel will assign families adjacent rooms.

✓ The Corner Twin Room is officially bookable for up to 4 guests.

Worth knowing: This is a conventional hotel, not an apartment: rooms have a fridge but no kitchenette or cooking facilities, and only the Corner Twins sleep four (standard rooms are compact 12 sqm doubles).

Hotel · Odaiba/Toyosu/Ariake

A bayfront luxury hotel with spacious 50 sqm Luxury Rooms sleeping four and a large Family Suite, directly on the Yurikamome line for Odaiba's kid attractions.

✓ The Luxury Room (Regular Floor) is officially bookable for up to 4 guests.

Worth knowing: Premium pricing, and the largest family suites sit in the most expensive Executive category.

Hotel · Takanawa

Its 'Superior Natural Fourth Room' (38.6 sqm) is a genuine four-bed family room, and the Takanawa garden complex is an easy walk from the Shinkansen and airport trains at Shinagawa.

✓ The Superior Natural Fourth Room is officially bookable for up to 4 guests.

Worth knowing: A large convention hotel where the limited Fourth Rooms sell out, and most other categories cap at two to three.

Hotel · Maihama, Urayasu (Chiba)

Official Hotel with a whole tier of story-themed 'Happy Magic Rooms' sleeping 3-6 with extra beds, an indoor pool plus seasonal garden pool, and buffet dining; free shuttle to Bayside Station.

✓ The Family Happy Magic Room Ocean is officially bookable for up to 6 guests.

Worth knowing: Bed configuration and room sizes for the Happy Magic Rooms aren't published; children aged 6+ are charged the adult rate.

Hotel · Odaiba/Toyosu/Ariake

Every room has a private balcony with bay views, there is an indoor pool, and the Superior Deluxe category is set up for two adults plus two children.

✓ The Superior Deluxe is officially bookable for up to 4 guests.

Worth knowing: Pool access carries a fee and exact family-room dimensions are not published, so confirm the layout when booking.