Editing Akashi Kaikyo Bridge (section)

===Investigations===

Investigations for a bridge across the strait were first conducted by the Kobe municipal government in 1957, followed by an evaluation by the national [[Ministry of Construction (Japan)|Ministry of Construction]] in 1959. In 1961, the Ministry of Construction and [[Japan National Railways]] jointly commissioned the [[Japan Society of Civil Engineers]] (JSCE) to conduct a technical study, and the JSCE established a committee to investigate five potential routes between Honshu and Shikoku. In 1967, the committee compiled the results of the technical study, concluding that a bridge across the Akashi Strait would face "extremely severe design and construction conditions, which have no similar examples in the world's long-span bridges" and recommending an additional study.<ref name="Yoshida">{{cite journal |last1=Yoshida |first1=Iwao |title=Basic Survey and Planning of Akashi Kaikyo Bridge |journal=Proceedings of the Japan Society of Civil Engineers |date=1990 |volume=418 |pages=1–15 |language=ja | issn=0289-7806 | doi=10.2208/jscej.1990.418_1 |doi-access=free }}</ref>

In response to the report, the Honshu–Shikoku Bridge Authority (now the [[Honshu-Shikoku Bridge Expressway Company]]<ref name=Ogihara>{{cite book |last1=Ogihara |first1=Katsuya |chapter=Akashi Kaikyo Bridge |editor1-last=Alampalli |editor1-first=Sreenivas |editor2-last=Moreau |editor2-first=William J. |title=Inspection, Evaluation and Maintenance of Suspension Bridges: Case Studies |date=2016 |publisher=CRC Press |location=Boca Raton |pages=40–58 |isbn=9781466596894 |chapter-url=https://books.google.com/books?id=5yXSCgAAQBAJ&pg=PA39 |access-date=September 28, 2021 |archive-date=September 28, 2021 |archive-url=https://web.archive.org/web/20210928060653/https://books.google.com/books?id=5yXSCgAAQBAJ&pg=PA39 |url-status=live }}</ref>) was established in 1970, which conducted extensive investigations, including sea trials to establish the construction method of a submarine foundation. In 1973, a bridge with a central span of 1,780 meters on the route was approved, but construction was halted due to poor economic conditions.<ref name="Yoshida" />