Even it takes about 13~15mins to get to the subway - Ginza station, this is the best place I have ever stayed.
There are three supermarkets near by and Lawson which only 5 mins walk.
Maruetsu Asakusa (淺草 4-23-8), which is the closest one.
Life Asakusa (西淺草 3-18-17), which you can buy stuff when return from Ginza station.
SanPei (三平) Store FreshFood Market (西淺草 2-14-16), which you can buy stuff when return from Ginza station, close to subway, cash only.
The host prepares plenty of tableware, plastic wrap, rubber bands and cooking sauce and also electronic facilities, such as, microwave, toast machine, electronic bottle and tablet for checking information easily with strong WIFI sharer that saved me during the trip (as the one I rent in my country doesn't work properly, so grateful)
I will choose here again in my next trip to Tokyo, this is a nice place, don't miss it, strongly recommend to everyone :)