As of March 31, 2020, steel was the most prevalent material for bridge superstructures in Japan, with steel bridges adding up to a length of approximately **** thousand kilometers. When accounted for the number, however, prestressed concrete bridges outnumbered them.
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MLIT (Japan). (February 4, 2022). Length of road bridges in Japan as of March 2020, by material used for superstructure (in kilometers) [Graph]. In Statista. Retrieved July 15, 2025, from https://www.statista.com/statistics/1228872/japan-bridge-length-by-material/
MLIT (Japan). "Length of road bridges in Japan as of March 2020, by material used for superstructure (in kilometers)." Chart. February 4, 2022. Statista. Accessed July 15, 2025. https://www.statista.com/statistics/1228872/japan-bridge-length-by-material/
MLIT (Japan). (2022). Length of road bridges in Japan as of March 2020, by material used for superstructure (in kilometers). Statista. Statista Inc.. Accessed: July 15, 2025. https://www.statista.com/statistics/1228872/japan-bridge-length-by-material/
MLIT (Japan). "Length of Road Bridges in Japan as of March 2020, by Material Used for Superstructure (in Kilometers)." Statista, Statista Inc., 4 Feb 2022, https://www.statista.com/statistics/1228872/japan-bridge-length-by-material/
MLIT (Japan), Length of road bridges in Japan as of March 2020, by material used for superstructure (in kilometers) Statista, https://www.statista.com/statistics/1228872/japan-bridge-length-by-material/ (last visited July 15, 2025)
Length of road bridges in Japan as of March 2020, by material used for superstructure (in kilometers) [Graph], MLIT (Japan), February 4, 2022. [Online]. Available: https://www.statista.com/statistics/1228872/japan-bridge-length-by-material/