Kazu is a wonderful host with an amazing home. The room is located on a separate floor from his family and has its own separate toilet room and bathroom with Japanese style bath and shower (so you can use the toilet if someone else is in the shower). He provides every essential you could ever need including towels, wifi, laundry, desk, toiletries, tea, and more.
There are never any problems getting into or out of the house and each room has a lock both on the inside and outside. The room has air-conditioning and heating that works great.
The house is located about half a mile from two stations and has a vending machine and convenience store right outside. One thing to note is that these stations are not JP rails stations, the closest one being shinjuku which is a 25 minute walk away.
Overall, I had a wonderful stay and would highly recommend staying at this beautiful home with a great host.