We had a great stay at Kotaro’s apartment. The place was quite spacious for Tokyo’s standards, and was very comfortable. All the amenities we needed were provided, and we appreciated the little extras like having luggage scales available. The heating was fantastic during winter.
The location was great - within walking distance to both the JR train station as well as the subway line, and also many restaurants and shops.
Communication with Kotaro was great - he was always quick to reply to messages. He also allowed us to leave our luggage prior to check in, and to check out late as there were no new guests coming that day which we appreciated.