We loved staying here!! Good instructions, warm and kind host. A bit of a trek (40 minutes) into Shinjuku/Tokyo if you are using the Tokyo metro line and not the JR private line (foreign travelers can be a reduced rate Tokyo metro pass). However, it is very close to the metro station.
Right next door to a food store and down the street from our favorite ramen place, we wound up there almost every day (its by the metro station).
Bed was comfortable enough,it’s of mats and blankets available. Easy to use washer, however, there is no dryer! We hung dried our clothes, but, that takes a bit as the house maintains some humidity.
Unique bathroom arrangement... we enjoyed the break from our western California norms.
Would highly recommend :)