Sagami-o-hashi, Transportation bridge between Ebina and Atsugi, Japan

Sagami-o-hashi is a 381 m road bridge over the Sagami River between Ebina and Atsugi, Kanagawa Prefecture, on the route of former National Route 246, now Kanagawa Prefectural Route 40. It is a cantilever plate girder bridge with five main spans of 57.8 m and 45.6 m end spans, designed by Matsuji Sasato with girders made by Nippon Kokan. At night, blue lights illuminate the parapet.

A first Sagami Bridge opened on 26 October 1908 slightly upstream, near today's Ayumi Bridge; it was washed away by heavy rain in 1910, rebuilt with a steel central section in 1912 and collapsed in the 1923 Great Kanto earthquake. Construction of the present bridge began in 1953 and it opened on 13 June 1955 as Sagami-o-hashi. In September 2024 it was certified as a JSCE Selected Civil Engineering Heritage site.

The bridge carries Kanagawa Prefectural Routes 40, 43 and 51 on the old National Route 246 alignment, and its name was given when the current span opened on 13 June 1955. At night, blue lights illuminate the railings, a detail visible to anyone crossing after dark.

The bridge carries Kanagawa Prefectural Route 40 (Yokohama-Atsugi Line, overlapping Routes 43 and 51) on the former National Route 246 alignment. Its five main spans of 57.8 m and two end spans of 45.6 m give a total length of 381 m. At night, blue lights illuminate the railing.

The bridge was the first in Japan designed for a live load of 20 tonnes, and most of its main girders use high-tensile steel. At night, blue lights illuminate the parapet. It was certified as a JSCE Selected Civil Engineering Heritage site in September 2024.