Chosei Bridge, Steel truss bridge in Nagaoka, Japan

Chosei Bridge is a 13-span steel Warren truss bridge over the Shinano River, completed in 1937, with a pale greenish-white truss forming triangular peaks above the deck. It is 850.8 m long and 7.0 m wide, rests on concrete piers, and has a separate 2.5 m downstream walkway for pedestrians and cyclists.

A wooden bridge opened here in 1876, the first across the Shinano in Niigata Prefecture, after Hiroe Chinzaemon proposed a toll bridge via a sandbar. Floods repeatedly destroyed it; the second wooden bridge of 1915, Japan's longest at about 873 m, was replaced by the current steel truss in 1937, built by Hitachi Shipbuilding at a cost of about 780,000 yen.

The bridge's name combines the first character of Nagaoka (長) with that of the former Kusōzu ferry landing (生), though a pun on "long life" is also cited and the exact origin is unrecorded. During the Nagaoka Festival's large fireworks display in summer, Niagara fireworks are set off from Chosei Bridge and the neighbouring Ōte Bridge.

The bridge sits three minutes by bus from JR Nagaoka Station and links the eastern and western sides of the city across the river. Visitors should expect windy conditions and take care when walking, as the open design offers little shelter from weather on the water.

Chosei Bridge is the only surviving multi-span steel truss bridge in Japan with an upper-curved chord, a Warren cantilever design. Hitachi Zosen fabricated the steel truss, and the bridge was completed on 12 October 1937 at a cost of about 780,000 yen, then the longest road bridge in the Tohoku and Hokuriku regions.