Katsu's place was located very conveniently close to the yamonote line, in Korea Town (Shin-Okubo) and shot walking distance to Shinjuku. A very lovely busy area, but just far enough from the main Street that you can sleep without extra noise. It was clean and everything in good condition. He was also kind enough to meet us when we arrived, was quick to respond to inquiries and had great recommendations for food! I recommend if you're looking for something centrally located and aren't looking for extra frills.