As many others have stated, this Airbnb can truly be a great experience, especially if you are going to stay for 2-4 weeks to visit Tokyo.
The home is very close to the train station, and it does not take long to get to the city's center. Narimasu certainly is a lot more quiet than the main hubs, but you are still very well equipped with groceries and convenience stores and everything else you could possibly need (like a barber shop).
The most appealing part is the cafe Patina. Not only will you enjoy delicious food and beverages, which can be surprisingly varied, you also get genuine interactions with the locals and frequent art exhibitions.