Aganogawa-o-hashi, Road bridge in Niigata, Japan.

The Aganogawa-o-hashi is a steel continuous girder road bridge on the Shin-Shin Bypass of National Route 7, carrying four lanes across the Agano River between Ichinichi in Higashi Ward and Nigorigawa in Kita Ward, Niigata. It is 903 m long and 23.25 m wide, with a 2 m walkway on each side; its three continuous box-girder sections each span four piers at 74.9 m.

The bridge opened in 1977, when the Ebigase to Keibajo section of the Shin-Shin Bypass entered service. It initially carried two provisional lanes, and the crossing was completed with four lanes on 20 October 1986. It is a road bridge on National Route 7, not a railway bridge.

The bridge carries National Route 7's Shin-Shin Bypass, and its name is simply the river's name plus "large bridge." Until fishing accidents led to a ban, anglers used to line its walkways; today the bridge is crossed on foot or by bicycle as well as by car.

The bridge carries National Route 7's Shin-Shin Bypass between the Ichinichi and Nigorigawa interchanges, with 2 m walkways on both the upstream and downstream sides. Steps and ramps at each end are narrow and little maintained, and fishing from the walkways is now prohibited.

The bridge is the third crossing from the mouth of the Agano River: downstream lies the Gosareya Aga Bridge on National Route 113, upstream the Taihei Bridge on the old National Route 7. Fishing from the walkways was once popular but is now banned after accidents with passing traffic.