I highly recommend Akari's apartment in Azubujuban! I've stayed in many Airbnbs in Tokyo and this was a top experience both for the apartment and my experience with Akari.
I love the Azubujuban area, having living nearby for two years awhile back. It is a convenient neighborhood with lots of restaurants and bars, and easy access to metro stations. Akari's apartment is just off the main street, and is very quiet and easy to access.
The apartment was perfect for my needs - with a bedroom area, bath with laundry, and kitchen/living space. It was wintertime when I stayed, but in the warmer months the balcony is a nice sized space to be able to sit and enjoy the fresh air. The space would be tight for more than three adults, but I could comfortably be there with my spouse and two children (on the pull-out couch). The additional heater in the bedroom made my winter stay comfortable.
Akari is incredibly responsive and friendly. One of the best AirBnB hosts I've ever interacted with!