Compared to the 2 other places we stayed in Japan, this was the biggest, size wise. There were 2 separate bedrooms, a bathroom, a laundryroom attached to a shower room, a kitchen attached to a living room area with a small balcony, and a traditional style sitting room. I may highly consider making this home base for the next trip.
The check-in process was a bit strange since there are no people staffing the building, but follow the email instructions, and its easy enough.