Explore details about location 国道４０４号. 国道４０４号 is a location situated within the 長岡市 alongside other areas such as 大口与板線, 大荒戸越路線, 県道9号; 9. Additionally, some smaller parts of 国道４０４号 include specific areas like 国道351号線, 国道８号 adding to the diversity of its landscape.