常紋隧道, Railway tunnel in Hokkaido, Japan
Tokumondou is a railway tunnel in Hokkaido, Japan, that runs through mountainous terrain and connects two sections of the regional rail network. The passage cuts through rock formations and was designed to allow trains to cross safely even during extreme winter conditions.
Work on this section began during World War II and was carried out under difficult conditions with many laborers working in harsh circumstances. After the war ended, the project continued and was eventually opened for regular train service.
The tunnel carries a name that refers to its geographic location in the region, showing the connection between infrastructure and landscape. Travelers can notice the sudden shift in light and temperature during passage, typical of longer tunnel crossings in Hokkaido.
Passengers travel through the passage without being able to exit, as it is an active section with no station inside. The crossing takes several minutes and offers insight into the technical implementation of rail connections in this mountain region.
During construction work, human remains of laborers who lost their lives during the building phase were discovered, leading to memorial sites nearby. These findings serve as a reminder of the human cost of large infrastructure projects from that era.
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