Such hospitality! Kenji was a great and courteous host, with fantastic recommendations for local scenes that you should consider putting on your list.
He was flexible and patient with our bumbling about getting there, after we accidentally caught a local train that took an hour longer than planned. Then, he gave us a ride from the train station when we finally made it. On the back end of the stay, he went an extra mile, or several, to take us over to the Eo-Tokyo Open Air Architectural Museum.
This museum was a hit, by the way. We spent six hours wandering through historically-significant buildings from the Edo/Tokyo area, some of which inspired Miyazaki for some films. The black water onsen Kenji recommended, also, was a fantastic experience.
The one regret is that we weren’t aware far enough in advance to get tickets to the Ghibli museum, which is near Kenji’s. You have to order tickets a month out, so we missed that opportunity.
Kenji’s place itself was great. It had the necessary amenities, and was well furnished for a traditional tatami mat / futon sleeping experience.
I would definitely recommend it, and encourage English-speakers to consider it as a way to escape the chaotic street scenes and cramped hotels in Shibuya or Shinjuku, and get a feel for what life is like in the less-crowded and touristy portions of Tokyo.