Route 43 was originally designated on 18 May 1953 as National Route 173, and this was redesignated as Route 43 when the route was promoted to a Class 1 highway.
Route data
Length: 30.2 km (18.77 mi).
References
^"一般国道の路線別、都道府県別道路現況" [Road statistics by General National Highway route and prefecture] (PDF) (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. Retrieved 19 February 2020.
^一般国道43号 (in Japanese). Kinki Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism. Retrieved 2010-11-29.