Koichi's Airbnb was close to the station and to shinjuku and many restaurants in Tokyo. He was friendly and responsive to questions and queries.
However i found that the kitchen was not clean enough that I was comfortable to cook (e.g. grease stains and dusty). Also the space is quite small (especially for a more prolonged stay) and the wardrobe was half taken up by their storage bedding and bags (when asked to remove this as we were staying for 2 months and needed it for storage space, it was denied). Overall Koichi is a friendly host, but the apartment is lacking.