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Built in 1949 to connect two towns in Kanagawa Prefecture's mountainous Minami Tama District, the Former Aoju Tunnel went from popular tourist attraction to permanently closed, off-limits site — with a ghost story that grew alongside its decline.
The Legend
According to local accounts, one of the tunnel's earliest visitors was a young woman who reportedly heard strange noises from within, followed by the appearance of a group of faceless figures. Terrified, she fled and never returned — an origin story that, notably, gives the haunting no named victim and no specific tragedy, just an unexplained encounter that set the legend in motion.
From there, the story expanded into a specific piece of driving folklore: those who pass through the tunnel at night may encounter strange figures and unusual noises, believed by some to be the spirits of workers who died during construction. The most striking detail is a warning repeated across multiple tellings — that stopping your car in the middle of the tunnel will cause the spirits to surround the vehicle, trapping the driver in place, unable to move.
What's Actually Verifiable
We could not verify the faceless-figures encounter or any construction-era deaths against a documented source. What is confirmed is the tunnel's actual closure: it was shut down in 1990 due to genuine safety concerns, a straightforward infrastructure decision that has nonetheless deepened the site's haunted reputation, since a closed, inaccessible tunnel naturally invites more speculation than one still in ordinary daily use.
A Legend Built Around a Specific Behavior
Like Mikumo Tunnel in Shiga Prefecture, this legend centers less on a backstory and more on an instruction: don't stop your car inside. That kind of actionable warning tends to spread differently than a purely descriptive haunting, because it gives every driver something concrete to actually do — or, in this case, avoid doing — regardless of whether they believe the underlying story.
From Tourist Attraction to Cautionary Tale
The tunnel's shift from a genuinely popular local attraction to one of the region's most avoided sites tracks closely with its formal closure in 1990 — suggesting that at least part of its haunted reputation grew specifically because it became inaccessible, rather than existing independently of that fact. A place people can no longer easily visit tends to accumulate more elaborate stories than one still in ordinary daily use, precisely because there's no continued, mundane experience of the site to keep the legend grounded.
Can You Visit?
The Former Aoju Tunnel has been closed to the public since 1990 and remains off-limits. That closure should be respected as a genuine safety measure, not treated as an obstacle to work around for the sake of the legend — the tunnel's condition after more than three decades of neglect is reason enough on its own.
Ghost-Hunting Gear & Further Reading
- Books on Japanese haunted places and abandoned infrastructure
- Kanagawa Prefecture travel and history guides
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