We had our own little apartment with Kenji. It was perfect for our needs. Kenji is a great host, picked us up from the train station and was helpful in every aspect. A word about the location: It is a bit off from downtown. But the express from the station nearby runs to the next Yamanote line station in approx 20 min. So on the one hand you stay in a quite neighborhood (I could not believe when I saw a field of vegetables right in front of our doorstep) and on the other hand all places where you need to be are still close. Will come back again when returning to Tokyo.