Tokyo no relation Ibaraki Prefectural Road Route 50
National Route 6 (国道6号, Kokudō Roku-gō) is a Japanese highway from Tokyo to Sendai that goes through the cities Mito, Iwaki and Sōma. It traces the old Mito Kaidō route from Tokyo to Mito, and, for much of its 353.6-kilometer (219.7 mi) route, it runs parallel to the Jōban railway line and the Jōban Expressway.
no relation