Due to the Tohoku earthquake on March 11, 2011, some of the municipal roads in Fukushima Prefecture have not been included in the data from 2011 to 2018.
Values prior to 2023 come from previous reports. Values have been rounded.
As of March 31, 2023, Japan counted approximately 5.08 thousand kilometers of road tunnels, increasing from around 4.32 thousand kilometers in 2014. Most tunnels measure between 100 and 500Â meters long.
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MLIT (Japan). (March 31, 2025). Total length of road tunnels in Japan from 2014 to 2023 (in 1,000 kilometers) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 14, 2026, from /statistics/862721/japan-road-tunnel-length/
MLIT (Japan). "Total length of road tunnels in Japan from 2014 to 2023 (in 1,000 kilometers)." Chart. March 31, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 14, 2026. /statistics/862721/japan-road-tunnel-length/
MLIT (Japan). (2025). Total length of road tunnels in Japan from 2014 to 2023 (in 1,000 kilometers). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 14, 2026. /statistics/862721/japan-road-tunnel-length/
MLIT (Japan). "Total Length of Road Tunnels in Japan from 2014 to 2023 (in 1,000 Kilometers)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 31 Mar 2025, /statistics/862721/japan-road-tunnel-length/
MLIT (Japan), Total length of road tunnels in Japan from 2014 to 2023 (in 1,000 kilometers) ÌÇÐÄÆƽâ°æ, /statistics/862721/japan-road-tunnel-length/ (last visited July 14, 2026)
Total length of road tunnels in Japan from 2014 to 2023 (in 1,000 kilometers) [Graph], MLIT (Japan), March 31, 2025. [Online]. Available: /statistics/862721/japan-road-tunnel-length/
