We stayed as Masahiro’s place for our final week in Tokyo. Location is fairly good with train stations not too far away. There is a bit of a hill hike so be warned for those with luggage. The hotel is old and isn’t manned by staff. The bed was very comfy and the room was well sized. Unfortunately we had issues with mould in multiple areas of the apartment, we hope this will be fixed for the next guests. We also had very loud neighbours and could hear everything they were up to, although this was not a fault of Masahiros. There were things broken such as the shower head which made the entire bathroom soaked, and the communal microwave which made our stay not very comfortable.
I believe with some cleaning and fixes this would be a better stay.