Staffs hand shaking at the break through ceremony of Kyushu-bound track of Kammon railway tunnel. From left to right, SAKAMOTO Sadao, OGINO Shotaro, KANO Kenji, KOSAKA Shiro
Ministry of Railway , Japan / 鉄道省
"Story of Kammon Tunnel" / 『関門とんねる物語』冒頭ページ