I had a wonderful 1 month+ sray at Hiromasa-san's place! The room was more than comfortable for one person, but it might be a squeeze for two. Hiromasa-san was very responsive and very accomodating; I arrived early in Japan and he let me check-in a few hours early! He was also very friendly to chat with in Japanese, remembered my details, and was responsive with communication.
The room was very clean when I arrived, and because I was around for more than a month, he made sure I had access to cleaning supplies, as I love a clean home. The bathroom, which is outside the main room on the first floor, was cleaned and restocked each week.
The only downside to my stay were the other guests. On the top two floors are larger rooms that often whole families would rent. They would come in late at night (after 11 PM) and were often loud. Additionally I would often find the front door to the home unlocked, so make sure to lock your room door!
I loved my stay here and would come back!