Dai, Toshi & Core are great hosts. They did everything to make us feel welcome. They were prompt when answering questions about the accommodation itself, the area and Tokyo. We had the pleasure of meeting Yoko from the Core team. She is super nice and provided us a list of reccomendations. The apartment is clean and only a short walk to public transportation. The Sumida neighborhood is very cozy. It was a perfect location away from more touristy areas in Tokyo after a busy day and night around the city. Also the place is close to a Sumo stable. During our walks to the train/subway we saw Sumo wrestlers walking or practicing. That certainly added to the uniqueness of the area. I highly recommend Toshi's place when visiting Tokyo!