I have been to Japan four times by now and am currently staying for a year and I can confidently say that Ken is one of the best hosts you will ever encounter during your time in Japan. Not only was communication always fast, he went above and beyond to make my stay as great as it could be.
He picked me up from the station on a scorching summer day, which was amazing. He constantly kept in touch with me over LINE and invited me to dinner at a friend of his (which is also a host on here) TWICE. Curry, beef, salads, drinks, miso soup - as much as you want! It was incredible and even though I could not communicate too well with the other host due to my broken Japanese, we made it work!
Ken also showed me his parents old traditional Japanese home and another nearby establishment, giving me a tour of them.
The place itself is perfect for one person. The kitchen has everything you need, the living room is big enough to have an open suitcase lie around all the time. The bath might be a bit small but it is perfectly managable.
The location is fantastic. If you want to be outside central Tokyo but not too far away in case you want to take a trip there fast, Tsurukawa is a great place to stay. The apartment is 3-5 minutes away (ON FOOT) from a Uniqlo, CoCo ichibanya, a small supermarket, Mosburger, an Indian curry restaurant and a Sukiya. If you are a curry addict like me, you might end up eating way too much of it!
The area is quiet, yet has everything you need. Parks and some larger reserves are nearby and the station is just ~15 minutes away on foot so you can take trips to Kamakura or Yokohama relatively easy.
Give this place a shot. As I said in the beginning, I have been to Japan a few times before and this was by far my favourite place to stay.