The apartment is close to JR Nakano station, only 5 mins walk. If you take JR rapid train, 4 mins to Shinjuku, less then 20 mins to Tokyo. Very convenient location and easily accessible to most part of Tokyo. There are several convenient stores and a supermarket in 5 min walk distance. Nakano itself is an interesting place to explore. Nakano Broadway is nearby. You can find lots of store that sell figures, comics, vintage accessory, cosplay clothing and 2nd hand expensive watches ( Rolex, AP, Panerai, etc ).
The room and the tatami floor is clean. There is dust in the sink and the bathroom is small. Except that, everything was fine. The host is very nice and can communicate in fluent putonghua. High CP value, highly recommended.