Mystery TunnelミステリートンネルEP 42025-09-12According to verification, this tunnel is located between Ichishiro Suspension Bridge and Abt Ichishiro Campground. It is the shortest route to the campground, passing through a pitch-black tunnel with artificial scare setups. It is currently managed by the campground and was once an old Igawa Line route abandoned due to dam construction. Be sure to bring a flashlight. Free to visit.
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