Very calm small little house in Ota-Ku. Residential area with shops and restaurant 5 minutes' walk.
The walls are paper thin and you can hear everything from the street and neighbours, but that is rather normal for Japan. You will hear people passing by late at night, so if you're a light sleeper, bring earplugs. The heat worked well, and so did the hot water. The kitchen has all you need for a long stay.
It was a shame that there were so many prohibitions/pamphlets all over the house on the walls (don't throw the trash, don't make noise, no loud voices, no loud music...etc.), it made it a bit cold and aggressive (as reading the check in rules would suffice I suppose), but that is just a taste thing I guess, and I imagine maybe other guests were not respectful in the past.
There was an incident apparently with noise that the neighbours raised to the house owner on a day that I was not staying in the flat and I got contacted asking if it was me. I felt a bit targeted (as the only non Japanese living in the area) and rather uncomfortable, but luckily I could proof I was not staying in the house that night. From that day on I felt a bit observed by the neighbours (my comings & goings), but it's also something positive that the community there takes care of what's going on in the area.
All in all, a nice stay in the south of Tokyo, very close to Haneda and relatively easy to get around to anywhere in the city. The supermarket just 5 minutes' walk is phenomenal and has everything you need.
The communication was very good, I had an issue with the key and it was solve promptly.