I can't recommend enough of tatsu & yuka's property! We were a family of 7 all adults and we slept comfortably.
Less than 10minutes walk from sugamo (JR) station and with japan train system going everywhere is a breeze especially with JR pass.
The 10minutes walk were always spent visiting small japanese shops along the road, we spent at least 30minutes of browsing the shops each morning (we stayed for 9days), very recommended!
The house itself is new, very clean and definitely more spacious compared to hotels around this budget. All in all a very great stay and will come back given the opportunity.