Daiju's place is located in a nice neighbourhood (Hakusan). It's really close to the subway and to local convenience stores, and there are also supermarkets and restaurants nearby. There is also a big shopping centre and funpark at theTokyo Dome, 2 subway stops away.
The apartment has two bedrooms (sleeping on the floor Japanese-style) and a compact kitchen/living room, which also contains the washing machine and bathroom basin. A small toilet and shower open onto the living room. The building itself is super quiet, but it's located on the corner of an intersection so there is a bit of street noise and interesting people to watch going by.
We stayed as a family of four for a week, and found it a small but very convenient base.