Koichi is a wonderful host! He was super easy to communicate with, always on time and even picked us up from the train station and kept our luggage with him after we checked out of the flat! Absolutely outstanding hospitality! He recommended some restaurants and even booked it for us! The apartment is also perfectly located in a more quiet area of Shinjuku, which was really nice,and about 10 min walk from Shinjuku National Park, which is very nice to walk around. The place is super clean, organised, bright and close to shops, restaurants and subway station.