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MIMARU Tokyo Shinjuku West: Family Rooms & Child Policy

Tokyo · Nishi-Shinjuku, Shinjuku-ku · Tochomae Station (Toei Subway), 8 min walk

Conditions last checked on the hotel’s official pages: 2026-10-05. Official website

Family rooms at a glance

Room type	Max guests	Beds / futons	Size	Children
Superior One-Bedroom Apartment (6 Single-Beds)	6 adults + 2 children aged 6 or under	6: 6 single beds	58 m²	Up to 2 children aged 6 or under (at check-in) are not counted toward adult capacity and may share a bed with an adult; age 7+ counts as an adult.

Free bed-sharing: 6 and under at check-in
Baby cot: Free baby crib for infants under 2 (limited; note in reservation comments); free bed guards (age limits apply)
Laundry: Coin laundry on site (no in-room washer-dryer)
Kitchen: Full kitchen (IH stove, fridge, microwave, kettle, cookware, tableware)
Connecting rooms: Not needed (single room for 6)

All 5 room types at MIMARU Tokyo Shinjuku West

Every room type on the hotel’s official page, with the capacity it states. Children aged 6 or under sharing a bed are not counted toward the adult capacity (up to the number shown).

Room type	Size	Capacity	Beds	Washer in room	Fits 5?
Family Apartment	40 m²	4 adults + 2 children 6 or under	Single bed x2, Bunk bed x1	No	Only with young children
Apartment (4 Single-Beds)	40 m²	4 adults + 2 children 6 or under	Single bed x4	No	Only with young children
Japanese Apartment	42 m²	4 adults + 2 children 6 or under	Single bed x2, Futon x2	No	Only with young children
Superior One-Bedroom Apartment(6 Single-Beds)	58 m²	6 adults + 2 children 6 or under	Single bed x6	No	Yes
Deluxe Japanese Apartment	60 m²	6 adults + 2 children 6 or under	Single bed x2, Futon x2, Bunk bed x1	No	Yes

“Only with young children” = five people fit only if at least one or two are aged 6 or under. Source: mimaruhotels.com/en/hotel/shinjuku-west (checked 2026-10-05). Compare every MIMARU: MIMARU hotels compared.

Child policy

These rules come from the MIMARU (apartment hotels) official policy or FAQ page:

Free bed-sharing age	6 and under at check-in
Bed-sharing limit	Up to 2 children aged 6 or under per room are not counted toward adult capacity and can share a bed with an adult (connecting room types list Children 4)
Counted as a guest from	7 (guests aged 7+ at check-in count as adults)
Several children	Each room type page states 'Adults N / Children 2' (Children 4 for connecting types); children defined as ages 6 and under
Baby cot	Free baby crib for infants under 2 (limited; note in reservation comments); free bed guards (age limits apply)
Extra bed	Not confirmed

Children aged 7 and over count as adults toward room capacity.

Room type	Child rule on the room page	Baby cot	Extra bed
Superior One-Bedroom Apartment (6 Single-Beds)	Up to 2 children aged 6 or under (at check-in) are not counted toward adult capacity and may share a bed with an adult; age 7+ counts as an adult.	Yes, free baby crib and bed guard rental for infants under 2; limited stock, request in advance	Not confirmed

Can a family with 3 children stay in one room?

With two adults and three children you are five people. Whether one room is enough depends on two numbers the hotel publishes: the room’s maximum guests and the age up to which a child can share a bed without being counted (here: 6 and under at check-in).

Superior One-Bedroom Apartment (6 Single-Beds): 6 adults + 2 children aged 6 or under; 6 sleeping places (6 single beds).

All room types listed here take 5 or more guests in one booking. If your children are older than the bed-sharing age, count each of them as a guest and make sure the room has a sleeping place for each.

Room types for big families

Superior One-Bedroom Apartment (6 Single-Beds) — MIMARU Tokyo Shinjuku West

Tokyo · Nishi-Shinjuku, Shinjuku-ku · Tochomae Station (Toei Subway), 8 min walk

Apartment suite
Sleeps 6
Full kitchen

Sleeps: 6 adults + 2 children aged 6 or under
Bed layout: 6 single beds
Room size: 58 m²
Laundry: Coin laundry on site (no in-room washer-dryer)
Kitchen: Full kitchen (IH stove, fridge, microwave, kettle, cookware, tableware)
Connecting: Not needed (single room for 6)
Smoking: Non-smoking (all MIMARU rooms are non-smoking)
Notes: Studio layout; 2 washbasins, 1 toilet, 1 bathroom. Deluxe Japanese Apartment (60 sqm, 2 singles + 2 futons + bunk bed, 6 adults) is the other 6-guest type here.

Official room page

Checked 2026-10-05 on: mimaruhotels.com/en/hotel/shinjuku-west, mimaruhotels.com/en/faq

Sources

mimaruhotels.com/en/hotel/shinjuku-west (checked 2026-10-05)
mimaruhotels.com/en/faq (checked 2026-10-05)

We have not stayed at this hotel. This page only summarises what the hotel publishes; the hotel’s own page and your booking confirmation take priority. “Not confirmed” means the pages we checked do not say.