Went with a party of 6, and we fit perfectly fine. Beds are large enough for 2 people each. The room was spacious enough, and there’s a big closet area too, so luggage can be placed out of the way. Wifi worked well and the place was clean. The airbnb is about 25 mins walking from the closest JR station (Nakano Station), but there’s also local lines much closer plus nearby convenience stores. Neighborhood is nice and quiet. And, Hikari was very quick to respond to questions we had prior to arriving.