Nagaoka Bridge, Road bridge in Nagaoka, Japan

The Nagaoka-ohashi is a road bridge spanning about 1 kilometer across the Shinano River and connecting different areas of the city via National Route 8. The structure uses steel girder systems to support the long distance across the water.

Construction was completed in November 1970 and represented an important step in Japan's infrastructure development following the post-war period. The completion helped better connect the previously fragmented city.

The streetlights carry reliefs of the shakudama, the three-shaku firework shell fired at the Nagaoka Festival's fireworks display, and of a phoenix. Three balconies on the cycle and pedestrian walkways look out over the Shinano River basin.

The bridge is accessible both by foot and by car and provides a clear crossing for both types of traffic over the river. Visitors should be aware that it can be heavily used during peak traffic hours.

The streetlights carry reliefs of the sand-grain firework shells (sanjaku-dama) launched at the Nagaoka Festival's fireworks display, and of a phoenix. Three balconies on the cycle and pedestrian walkways look out over the Shinano River. The bridge is one of only two bridges over the Shinano within Nagaoka managed by the national government, together with the Koshino-Ohashi.