Norimasa's place is in a bustling area with lots of great small eateries around, we really loved it! Despite the buzz, it is in a (more or less) quiet side street, and really close from Nakano Station which was very convenient. The place itself is functional if not a little small, but again we didn't mind as we were out and about all day anyways. Nakano itself is a great place to stay, it's central and everything is easily reached by train or subway. To be recommended!