Kentaro-san is a very friendly and welcoming host. I've stayed at 2 units from his listings for a week in August/September 2016, and I must say that they exceeded my expectations (it's actually better in reality than advertised). The size of the apartments were pretty big considering they are in Tokyo and the neighbourhood was just perfect - quiet, safe and peaceful. They are packed with amenities - kitchen, washing machine/dryer, mobile WiFi, etc. Very suitable for travellers in group or with family/kids.

The listings are close to subway stations as well - around 10 minutes walk. Getting around Tokyo was a breeze thanks to this. Highly recommended.