From the east exit of JR Shinjuku station, go straight ahead along the road on the left alongside the train tracks. At Yasukuni dori, turn right and go to the pedestrian crossing and cross Yasukuni dori. You'll see a pachinko parlour and a McDonalds in front of you on the left. Go down the street between the McDonalds and the Seibu Shinjuku station building. Keep going straight ahead, passing Seven Eleven and Hidakaya. Turn right just after Kabukicho Plaza. Marble is on the left in a basement.