Hanako's place is definitely for 2 adults with 1 kid at most. My family and I, 4 adults, stayed here for 6 nights, and couldn't say that we enjoyed our time here as the space was too limited. Not only it was very uncomfortable to move around, our baggage could be opened only one at a time. Nevertheless, the location is satisfying for around 5 minutes walking from JR Otsuka Station with many convenience stores (7-11, family mart, aeon) and local restaurants nearby. Hanako also allowed me to early check-in and was very fast responded. So, I would strongly recommend this place if your trip has no more than 2 adults.