Record: 328 m
Main Span Record: 297 m
The Omishima Bridge is the only arch bridge built on the strait of the Honshu-Shikoku Bridge. The construction of the Honshu-Shikoku Bridge in 1975 started as the first long bridge, and opened in 1979. Arch 297 m was the longest in Japan at the time of completion.Website:https://www.jb-honshi.co.jp/shimanami/about/shimanami/p05.html