Excellent host and excellent place. Walking distance to the bustling Shinjuku station and Kabukicho, and just a few minutes to the closest subway station. The apartment is in an excellent and central location, and despite this, the immediate surroundings are quiet and serene. there was very little noise from the neighbors. An excellent stay for two people.
Furthermore, Koichi was a great host and replied very quickly to all questions we had during our stay.