You will be staying at Tokio's house together with his parents. The room that you will use is spacious plus you have the use of a living room with a huge TV, and a sofa set. The bathroom and detached toilet are modern and has very nice facilities. The neighborhood itself is very quiet with some interesting local restaurants which we unfortunately never got to try. There is a 7-11 not more than 50 meters away and a Lawson right at the entrance to the street where Tokio's house is when you come from the train station.
The nearest train station is the Keikyu Kamata station. At the vicinity of the west exit of the station are several restaurants plus a big grocery/supermarket. Take the east exit when going to Tokio's place. It is a good 8-10 minute walk so keep that in mind when you plan to bring big bags.
All in all, we enjoyed our stay at Tokio's place and I can recommend this place if you want a quiet place to stay in Tokyo that is still within reasonable commuting distance to the center of the city.