9:30 AM - 9:40 AM
*Hideki Yokoyama1, Tsuru Tsunetaka2, Kohara Junichi3, Kitagawa Junichi4 (1. Japan Railway Construction, Transport and Technology Agency, 2. Minamiaso-Railway Management Organization, 3. Yachiyo Engineering Co., LTD. , 4. MM BRIDGE Co., LTD. )