We really enjoyed staying at Sei's place... we were very comfortable, the place is easily accessible, clean and the bunk beds are very spacious. The neighbourhood itself is quiet and very safe, however there are many restaurants which are open until late on the night and there were several 24 hour shops close by (we loved the 7/11!) Sei was very quick to respond to our messages which made us feel comfortable when being so far from home. Just as a note if you are used to using large towels when showering be sure to bring one with you as the ones which are provided are quite small. Overall we loved Tokyo and had an amazing time and Sei's place definitely contributed to our positive experience.