5 stars: the location is amazing and you live in centrally Tokyo with 2 stops to Shinjuku - you can do anywhere. The place is also close to metro station and once you know the area you’ll find it’s super convenient. The place is amazing. A proper Japanese style which you can enjoy it and experience your trip.
4stars: the bathroom amenities are less than what I expected, considering Japan has the high level of hospitality. You can get everything easily from convenient stores but it will be nicer if the host can provide toothpaste/brush etc. The bathroom is small and you don’t have a smart toilet which isn’t that common now in Japan. Also, as others said the bathroom is cold and the fan doesn’t work well which resulted in humidity in the bathroom even for overnight.
Overall- amazing