Nagahama Bridge, Movable bridge in Ozu City, Japan.

Nagahama Bridge is a movable bridge spanning the Hijikawa River mouth in Ozu, with a distinctive red-painted steel structure. The span is approximately 230 meters long and features a central section that lifts to allow boats to pass underneath.

The bridge was completed in 1935 and remains the oldest operational movable road bridge still in use in Japan. It was built to accommodate vessel traffic on the river while maintaining a road crossing above it.

The bridge represents an important part of how Ozu adapted to living with both river traffic and road travel, showing practical thinking in urban design. People in the area view it as a symbol of engineering that serves the everyday needs of the community.

The bridge carries a prefectural road between Ozu's dense left-bank streets and the right-bank shopping street; the 1977 New Nagahama Bridge beside it now takes through traffic. The bascule span is raised for inspection every Sunday at 13:00, and from July to September it is lit from 19:00 to 21:00.

The lifting mechanism uses a counterweight of roughly 80 tons to raise a center section of about 18 meters. This engineering approach allows the bridge to support heavy traffic while creating passage space for boats below.