I really liked this place as a solo traveler. The room was small and cozy with personal heater and the building was in a safe neighborhood. As an international traveler, it was a little difficult for me to understand a Japanese address, but other than that, it was easily walkable from the subway station.
The shared bathroom was clean and I did not have any trouble sharing it with the other guests. The bathroom sink is in the common area, so turning on the water / brushing my teeth, I felt like I was disturbing other guests, but it wasn't too bad.
Kusano Kan, the host, was very easily reachable and gave me lots of helpful information about how to find the place, as well as contact information on Line and Wechat (messaging apps). I came pretty late at night on my first day, but he still made the effort to come and introduce himself, which I really liked.