Yamamoto's place is a little far from the JR ikebukuro station (about 20 mins walk), the neighbourhood we're staying in was decent and was relatively quiet.
it is officially a 2 bedroom house with the living room doubling as the 3rd bedroom, the shower and toilet are at the first floor (entrance to shower is through the living room).
aside from that his place was a really good place to stay and we enjoyed our time there.