As of March 31, 2023, Japan counted ***** tunnels with a length between 100 and 500 meters, making it the most common range for tunnels on the archipelago. The term tunnel refers only to structures that have been built for passing through natural obstacles like mountainsides, plateaus, the underground, river bottoms, et cetera. Consequently, the statistic does not include underground crosswalks, box culverts, rock or snow sheds, and similar.
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MLIT (Japan). (March 31, 2025). Number of road tunnels in Japan as of March 2023, by length [Graph]. In Statista. Retrieved June 06, 2025, from https://www.statista.com/statistics/1229143/japan-tunnel-number-by-length/
MLIT (Japan). "Number of road tunnels in Japan as of March 2023, by length." Chart. March 31, 2025. Statista. Accessed June 06, 2025. https://www.statista.com/statistics/1229143/japan-tunnel-number-by-length/
MLIT (Japan). (2025). Number of road tunnels in Japan as of March 2023, by length. Statista. Statista Inc.. Accessed: June 06, 2025. https://www.statista.com/statistics/1229143/japan-tunnel-number-by-length/
MLIT (Japan). "Number of Road Tunnels in Japan as of March 2023, by Length." Statista, Statista Inc., 31 Mar 2025, https://www.statista.com/statistics/1229143/japan-tunnel-number-by-length/
MLIT (Japan), Number of road tunnels in Japan as of March 2023, by length Statista, https://www.statista.com/statistics/1229143/japan-tunnel-number-by-length/ (last visited June 06, 2025)
Number of road tunnels in Japan as of March 2023, by length [Graph], MLIT (Japan), March 31, 2025. [Online]. Available: https://www.statista.com/statistics/1229143/japan-tunnel-number-by-length/
