Our family really enjoyed staying at Sharon's place during our Christmas holidays in Tokyo. It is very spacious with combination of 2 apartment units accessible jointly on the ground floor. One of the units had a nice living and dining area on the 2nd floor, which is where we hung out most of the time. Everything was clean and felt nearly brand new, including the two sets of appliances (i.e.: 2x big refrigerators, 2x washers & dryers, etc). There were plenty of blankets, linens, and towels for our whole group.
The location is about 10min walk away from the Otsuka Station and is in a very nice, quiet neighborhood. Nearby within 3min walk there is a great shopping street which is very lively and filled with street vendors on weekend's.
We recommend these restaurants in the area:
https://goo.gl/maps/QgTHeiw2aCu
https://goo.gl/maps/VigyWJS1GYt
https://goo.gl/maps/VtbyM8TvaTL2
https://goo.gl/maps/wT6bNxarErm
Highly recommend you stay here if you have a big group!