Koichi was there when we arrived to welcome us and make sure we had everything we needed - he answered any questions and made sure we were set for our visit, he checked in with us to see everything was ok throughout the stay, always keeping in contact by email. The apartment was perfectly located and had everything needed for a stay in Shinjuku. It's close to the subway and was easy and convenient to get around Tokyo! I would highly recommend a stay in this apartment :)