Kaita Ohashi Bridge, Steel bridge in Hiroshima Bay, Japan

Kaita Ohashi Bridge is a steel crossing spanning Hiroshima Bay to connect the eastern port area with the mainland. It consists of continuous steel-box girder sections that form its structural backbone.

The bridge opened in 1990 to improve cargo distribution in the eastern port and reduce traffic congestion in the city. It became an important part of regional logistics infrastructure development.

The bridge's nickname is Hiroshima Bay Bridge, and its 1990 opening was marked by the Japan Society of Civil Engineers' Tanaka Award. The name Kaita Ohashi comes from the Kaita district it links to the eastern distribution centre.

The bridge is a toll road managed by the Hiroshima Port Management Center, with ETC lanes in operation since 2010. Pedestrians, bicycles, mopeds, small motorcycles up to 125 cc and two-up motorcycles ridden by those under 20 or licensed less than three years are prohibited, so it functions much like a motorway. The road administration counts Nihō as the starting point and the Ryūtsū Danchi as the terminus.

The 30 m figure is the navigational clearance under the span, not the bridge's height: Hiroshima Bay's Kaita district carries 5,000-tonne-class transport ships, so planners set a comparatively large clearance. The main span of 250 m made it Japan's longest girder bridge when completed, and it remains the country's longest unsupported solid-web girder bridge.