We lived our weeklong homestay in Katsushika. Everything you need is a 10 minute walk away or less. It feels like a large town, with its modest homes and small shops. My husband went to a bakery and a sushi shop every morning and brought back goodies for breakfast. Be prepared, most businesses do not open before 10am, but they do stay open later. Most locals do their shopping after work. The kitchen is very pared down, which is typical for Tokyo, but perfect for an urban homestay. Restaurants and food stands are plentiful and cheap. Many locals eat out most meals. Our favorite neighborhood restaurant Iroya was 3 blocks away. The menu is in Japanese, but the staff and customers are very helpful.
The 24 hr local 7-11 two blocks away will be your friend. The ATM takes debit cards and dispenses cash in $100 increments. You can buy cool Japanese snacks, meals, and even postage stamps (about 90 yen for a postcard stamp to US, not a special international stamp, just write par avion under address).
We used Suica passes or apps to get around the city, which was convenient as they can be used on most forms of transit, including the Japanese Rail line into the station that is a 10 min walk from the house. Amazingly, most of what we wanted to do (parks, shrines, museums, downtown, shopping) did not require a transfer!
One of the nicest things about the neighborhood is a unique park 2 blocks away. It has whimsical dragons and water features. Cherry blossoms were in bloom, making it even more beautiful.
A traditional hot spring bath house (onsen) is a 15 min walk away. It feels like a resort and is worth the $25 admission. I had a wonderful $20 foot massage.
This Airbnb is an oasis in a city of 37 million.