One must remember that accommodation in Tokyo is quite compact especially if you are travelling with multiple suitcases - there may not be enough room for them.
Recommend you get a Pasco or Suica card at the Airport - they are excellent for using them for your travel on trains, buses and even paying for your meals at some outlets.
There are many varieties of dining options around Masami's apartment.
Masami offers complimentary wifi at the apartment, which is also portable and can be taken around with you on your travels.
Very convenient modes of transport available in Hatagaya.