We had a great stay in Masaharu's place. His communication was top-notch during our entire stay. The apartment has a great location: close to high-end shopping and a wide range of dining. There are metro stations within 5 minutes walking, at least one of which is only one stop away from Tokyo Station, which is a hub for Shinkansen (bullet train) and Narita Express (train to/from airport). The pictures of the apartment in the listing portray an accurate depiction.
The apartment is on the 4th floor with no elevator available, so make sure you are physically able to walk up stairs before booking.