隅田川大橋, Steel bridge in Koto, Japan

The Sumidagawa Ohashi is a two-level bridge over the Sumida River, carrying Tokyo Metropolitan Route 475 on its lower deck and the Metropolitan Expressway Route 9 on the upper deck. Completed in October 1979, it has a total length of 385.3 m, with a 210.0 m river span, and a width of 30.0 m for four lanes. The steel box girder superstructure was fabricated by Ishikawajima-Harima Heavy Industries and Miyaji Iron Works.

The bridge was completed in 1979 and created a vital transportation link between the Nihonbashi financial district and residential areas in Koto. Its opening marked a turning point in the region's modern development.

The bridge carries the name of the Sumida River itself, and its lower deck opened in 1979, a year before the expressway viaduct above it. The structure holds the Hakozaki Junction on the Chuo side and the Fukuzumi entrance on the Koto side, and the Hanzomon subway line runs in a tunnel beneath the river here.

The best time to cross is outside rush hours when pedestrian traffic is lighter and views are clearer. The nearest station at Suitengumae is about a seven-minute walk away and provides the most direct access to the bridge.

The Sumidagawa Bridge is the only two-level bridge over the Sumida River: the lower deck opened in 1979, and the elevated Metropolitan Expressway Line 9 section followed the next year. The subway Hanzomon Line runs in a tunnel beneath the river here. Its high elevated section lets pedestrians see as far as the waterfront buildings of the Tokyo Bay area.