As of March 31, 2022, Hokkaido was the Japanese Prefecture with the highest accumulated length of tunnels, amounting to approximately 364.85 kilometers. Overall, road tunnels in Japan added up to over five thousand kilometers at the time.
Length of road tunnels in Japan as of March 2022, by prefecture
(in kilometers)
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MLIT (Japan). (March 22, 2024). Length of road tunnels in Japan as of March 2022, by prefecture (in kilometers) [Graph]. In Statista. Retrieved December 21, 2024, from https://www.statista.com/statistics/1229150/japan-tunnel-length-by-prefecture/
MLIT (Japan). "Length of road tunnels in Japan as of March 2022, by prefecture (in kilometers)." Chart. March 22, 2024. Statista. Accessed December 21, 2024. https://www.statista.com/statistics/1229150/japan-tunnel-length-by-prefecture/
MLIT (Japan). (2024). Length of road tunnels in Japan as of March 2022, by prefecture (in kilometers). Statista. Statista Inc.. Accessed: December 21, 2024. https://www.statista.com/statistics/1229150/japan-tunnel-length-by-prefecture/
MLIT (Japan). "Length of Road Tunnels in Japan as of March 2022, by Prefecture (in Kilometers)." Statista, Statista Inc., 22 Mar 2024, https://www.statista.com/statistics/1229150/japan-tunnel-length-by-prefecture/
MLIT (Japan), Length of road tunnels in Japan as of March 2022, by prefecture (in kilometers) Statista, https://www.statista.com/statistics/1229150/japan-tunnel-length-by-prefecture/ (last visited December 21, 2024)
Length of road tunnels in Japan as of March 2022, by prefecture (in kilometers) [Graph], MLIT (Japan), March 22, 2024. [Online]. Available: https://www.statista.com/statistics/1229150/japan-tunnel-length-by-prefecture/
