We loved this place! We were in Japan for 2 weeks and this was our favorite place that we stayed. It has good beds, a heater in the bathroom, a washer, kitchen with everything you need to cook, great instructions on how to get into the building, no loud neighbors and everything was wonderful. The only problem is the location. It is not close to a JR line, so if you buy the JR pass, you'll either need to walk 40 minutes to the nearest JR station or pay extra money to ride the local line.
Other than that one super minor thing, it was perfect. We loved this place and would absolutely stay here again, no questions asked.
We also really loved the neighborhood and the food options close by. The best Ramen of our trip was a 5 minute walk away.