This article organizes paranormal rumors circulating in tunnels across the Koshinetsu region, categorizing them not by the intensity of the sensations, but by "what can be confirmed," "what cannot be confirmed," and "the conditions for safe investigation." This article does not prove the existence of paranormal phenomena, nor does it recommend visiting the locations.
The existence of paranormal phenomena cannot be confirmed. The map is for assistance in finding the location only and does not indicate permission to enter or safety. Please be sure to check the opening hours, restrictions, and administrator's information on the day of your visit.
How did you sort out the rumors about tunnels in the Koshinetsu region?
Descriptions of specific supernatural occurrences, accidents, deaths, and sighting frequencies from the previous text, whose sources could not be independently verified, have not been adopted as fact. The order of listing is not based on the strength or danger level of the paranormal activity, but rather on maintaining the location order of the existing articles. The structure has been revised to allow readers to easily separate and verify names, maps, and safety conditions.
| Listing order | Place name | Location properties | Rumors covered in existing articles (unconfirmed) | Conditions to check |
|---|---|---|---|---|
| 1 | Old Utou Tunnel (Yamanashi Prefecture) | Tunnels and old roads | Old Utou Tunnel (Yamanashi Prefecture): Unconfirmed rumors about something resembling a severed head. | Old Utou Tunnel (Yamanashi Prefecture): Check with the road administrator regarding passability, closed sections, and lighting. |
| 2 | Old Misaka Tunnel (Yamanashi Prefecture) | Tunnels and old roads | Old Misaka Tunnel (Yamanashi Prefecture): Unconfirmed hearsay about a woman's figure, voice, and strange occurrences involving vehicles. | Old Misaka Tunnel (Yamanashi Prefecture): Check with the road administrator regarding passability, closed sections, and lighting. |
| 3 | Old Inokashira Tunnel (Yamanashi Prefecture) | Tunnels and old roads | Old Inokashira Tunnel (Yamanashi Prefecture): Unconfirmed rumors about the shadowy figure of a child, strange occurrences with vehicles, and the sighting of a ghost. | Former Inokashira Tunnel (Yamanashi Prefecture): Check with the road administrator regarding passability, closed sections, and lighting. |
| 4 | Old Sasago Tunnel (Yamanashi Prefecture) | Tunnels and old roads | Old Sasago Tunnel (Yamanashi Prefecture): Unconfirmed hearsay regarding anomalies in photographs/videos and vehicles. | Old Sasago Tunnel (Yamanashi Prefecture): Check with the road administrator regarding passability, closed sections, and lighting. |
| 5 | Fukuyama Tunnel (Niigata Prefecture) | Tunnels and old roads | Fukuyama Tunnel (Niigata Prefecture): Unconfirmed hearsay regarding vehicle malfunctions. | Fukuyama Tunnel (Niigata Prefecture): Check with the road administrator regarding passability, closed sections, and lighting. |
| 6 | Akatani Tunnel (Niigata Prefecture) | Tunnels and old roads | Akaya Tunnel (Niigata Prefecture): Unconfirmed hearsay about hands, beckoning gestures, human figures, and voices. | Akaya Tunnel (Niigata Prefecture): Check with the road administrator regarding passability, closed sections, and lighting. |
| 7 | Uchiyama Tunnel (Nagano Prefecture) | Tunnels and old roads | Uchiyama Tunnel (Nagano Prefecture): Unconfirmed rumors about a woman's figure and a feeling of being chased. | Uchiyama Tunnel (Nagano Prefecture): Check with the road administrator regarding passability, closed sections, and lighting. |
| 8 | Matsushiro Imperial Headquarters Site (Nagano Prefecture) | Buildings and historical remains | Matsushiro Imperial Headquarters Site (Nagano Prefecture): Unconfirmed hearsay regarding changes in cold air and atmosphere. | Matsushiro Imperial Headquarters Site (Nagano Prefecture): Check the owner, entry permit, and public access area. |
| 9 | Shoshin Tunnel (Nagano Prefecture) | Tunnels and old roads | Shoshin Tunnel (Nagano Prefecture): Unconfirmed rumors about a female figure, strange occurrences with vehicles, and the appearance of a ghost. | Shoshin Tunnel (Nagano Prefecture): Check with the road administrator regarding passability, closed sections, and lighting. |
Listing order 1: Old Utou Tunnel (Yamanashi Prefecture)
Rumors that remained in existing articles
The existing text dealt with an unconfirmed anecdote about something resembling a severed head at the Old Utou Tunnel (Yamanashi Prefecture). Since this cannot be independently verified through primary sources, it will be treated as an anecdote linked to the Old Utou Tunnel (Yamanashi Prefecture), rather than as a factual occurrence or personal experience of a strange event.
How to read a map
The old Utou Tunnel (Yamanashi Prefecture) is categorized as a tunnel/old road in this article. The embedded map is for location assistance only and does not guarantee property boundaries, passable hours, private property, construction, closures, or parking availability.
Check the old Utou Tunnel (Yamanashi Prefecture) on Google Maps.
Checklist for safe inspection
Please check the latest information from road authorities regarding road closures, blockades of mine entrances and old roads, lighting hours, and rockfall/road surface conditions. Do not attempt nighttime exploration or a test of courage; prioritize on-site signs and instructions from road authorities over articles and maps.
Listing order 2: Old Misaka Tunnel (Yamanashi Prefecture)
Rumors that remained in existing articles
The existing text dealt with unconfirmed hearsay regarding the Old Misaka Tunnel (Yamanashi Prefecture): a woman's figure, voice, and strange occurrences with vehicles. Since this cannot be independently verified through primary sources, it will be treated as hearsay linked to the Old Misaka Tunnel (Yamanashi Prefecture), rather than as factual events or personal experiences of the supernatural.
How to read a map
The old Misaka Tunnel (Yamanashi Prefecture) is categorized as a tunnel/old road in this article. The embedded map is for location assistance only and does not guarantee information on property boundaries, passable hours, private property, construction, closures, or parking availability.
Check the Old Misaka Tunnel (Yamanashi Prefecture) on Google Maps.
Checklist for safe inspection
Please check the latest information from road authorities regarding road closures, blockades of mine entrances and old roads, lighting hours, and rockfall/road surface conditions. Do not attempt nighttime exploration or a test of courage; prioritize on-site signs and instructions from road authorities over articles and maps.
Listing order 3: Old Inokashira Tunnel (Yamanashi Prefecture)
Rumors that remained in existing articles
The existing text dealt with unconfirmed hearsay regarding the Old Inokashira Tunnel (Yamanashi Prefecture): the shadow of a child, strange occurrences with vehicles, and the appearance of a ghost. Since this cannot be independently verified in primary sources, it will be treated as hearsay linked to the Old Inokashira Tunnel (Yamanashi Prefecture), rather than as factual events or personal experiences of the supernatural.
How to read a map
The old Inokashira Tunnel (Yamanashi Prefecture) is categorized as a tunnel/old road in this article. The embedded map is for location assistance only and does not guarantee property boundaries, passable hours, private property, construction, closures, or parking availability.
Check the old Inokashira Tunnel (Yamanashira Prefecture) on Google Maps.
Checklist for safe inspection
Please check the latest information from road authorities regarding road closures, blockades of mine entrances and old roads, lighting hours, and rockfall/road surface conditions. Do not attempt nighttime exploration or a test of courage; prioritize on-site signs and instructions from road authorities over articles and maps.
Listing order 4: Old Sasago Tunnel (Yamanashi Prefecture)
Rumors that remained in existing articles
The existing text dealt with unconfirmed hearsay regarding anomalies in photographs, videos, and vehicles at the Old Sasago Tunnel (Yamanashi Prefecture). Since this cannot be independently verified through primary sources, it will be treated as hearsay linked to the Old Sasago Tunnel (Yamanashi Prefecture), rather than as factual events or personal experiences of the supernatural.
How to read a map
The old Sasago Tunnel (Yamanashi Prefecture) is categorized as a tunnel/old road in this article. The embedded map is for location assistance only and does not guarantee property boundaries, passable hours, private property, construction, closures, or parking availability.
Check the old Sasago Tunnel (Yamanashi Prefecture) on Google Maps.
Checklist for safe inspection
Please check the latest information from road authorities regarding road closures, blockades of mine entrances and old roads, lighting hours, and rockfall/road surface conditions. Do not attempt nighttime exploration or a test of courage; prioritize on-site signs and instructions from road authorities over articles and maps.
Listing order 5: Fukuyama Tunnel (Niigata Prefecture)
Rumors that remained in existing articles
The existing text dealt with unconfirmed hearsay regarding anomalies involving vehicles in the Fukuyama Tunnel (Niigata Prefecture). Since this cannot be independently verified through primary sources, it will be treated as hearsay linked to the Fukuyama Tunnel (Niigata Prefecture), rather than as factual evidence or personal experience of a strange occurrence.
How to read a map
In this article, the Fukuyama Tunnel (Niigata Prefecture) is categorized as a tunnel/old road. The embedded map is for location assistance only and does not guarantee information on property boundaries, passable hours, private property, construction, closures, or parking availability.
Check Fukuyama Tunnel (Niigata Prefecture) on Google Maps
Checklist for safe inspection
Please check the latest information from road authorities regarding road closures, blockades of mine entrances and old roads, lighting hours, and rockfall/road surface conditions. Do not attempt nighttime exploration or a test of courage; prioritize on-site signs and instructions from road authorities over articles and maps.
Listing order 6: Akatani Tunnel (Niigata Prefecture)
Rumors that remained in existing articles
The existing text dealt with unconfirmed hearsay related to the Akaya Tunnel (Niigata Prefecture): hands, beckoning gestures, shadows, and voices. Since this cannot be independently verified in primary sources, it will be treated as hearsay linked to the Akaya Tunnel (Niigata Prefecture), rather than as factual or personal experiences of the supernatural.
How to read a map
In this article, the Akaya Tunnel (Niigata Prefecture) is categorized as a tunnel/old road. The embedded map is for location assistance only and does not guarantee information on property boundaries, passable hours, private property, construction, closures, or parking availability.
Check Akaya Tunnel (Niigata Prefecture) on Google Maps
Checklist for safe inspection
Please check the latest information from road authorities regarding road closures, blockades of mine entrances and old roads, lighting hours, and rockfall/road surface conditions. Do not attempt nighttime exploration or a test of courage; prioritize on-site signs and instructions from road authorities over articles and maps.
Listing order 7: Uchiyama Tunnel (Nagano Prefecture)
Rumors that remained in existing articles
The existing text dealt with unconfirmed hearsay related to the Uchiyama Tunnel (Nagano Prefecture): a female figure and a feeling of being chased. Since this cannot be independently verified in primary sources, it will be treated as hearsay linked to the Uchiyama Tunnel (Nagano Prefecture), rather than as factual or personal experience of a supernatural occurrence.
How to read a map
In this article, Uchiyama Tunnel (Nagano Prefecture) is categorized as a tunnel/old road. The embedded map is for location assistance only and does not guarantee property boundaries, passable hours, private property, construction, closures, or parking availability.
Check Uchiyama Tunnel (Nagano Prefecture) on Google Maps.
Checklist for safe inspection
Please check the latest information from road authorities regarding road closures, blockades of mine entrances and old roads, lighting hours, and rockfall/road surface conditions. Do not attempt nighttime exploration or a test of courage; prioritize on-site signs and instructions from road authorities over articles and maps.
Listing order 8: Matsushiro Imperial Headquarters Site (Nagano Prefecture)
Rumors that remained in existing articles
The existing text dealt with unconfirmed hearsay regarding the Matsushiro Imperial Headquarters site (Nagano Prefecture) and changes in cold air. Since this cannot be independently verified in primary sources, it will be treated as hearsay linked to the Matsushiro Imperial Headquarters site (Nagano Prefecture), rather than as factual or personal experience of a strange occurrence.
How to read a map
In this article, the Matsushiro Imperial Headquarters Site (Nagano Prefecture) is categorized as a building/remains. The embedded map is for location assistance only and does not guarantee site boundaries, access hours, private property, construction, closures, or parking availability.
Check the Matsushiro Imperial Headquarters Site (Nagano Prefecture) on Google Maps.
Checklist for safe inspection
Only check the areas clearly designated as open to the public by the owner or manager, and do not enter closed buildings or premises without permission. Do not attempt nighttime exploration or a test of courage, and prioritize on-site signs and manager instructions over articles and maps.
Listing order 9: Shoshin Tunnel (Nagano Prefecture)
Rumors that remained in existing articles
The existing text dealt with unconfirmed hearsay regarding the Shōshin Tunnel (Nagano Prefecture): a female figure, strange occurrences with vehicles, and the appearance of a ghost. Since this cannot be independently verified in primary sources, it will be treated as hearsay linked to the Shōshin Tunnel (Nagano Prefecture), rather than as factual events or personal experiences of the supernatural.
How to read a map
The Shoshin Tunnel (Nagano Prefecture) is categorized as a tunnel/old road in this article. The embedded map is for location assistance only and does not guarantee information on property boundaries, passable hours, private property, construction, closures, or parking availability.
Check the location of the Shoshin Tunnel (Nagano Prefecture) on Google Maps.
Checklist for safe inspection
Please check the latest information from road authorities regarding road closures, blockades of mine entrances and old roads, lighting hours, and rockfall/road surface conditions. Do not attempt nighttime exploration or a test of courage; prioritize on-site signs and instructions from road authorities over articles and maps.
Things you can learn from comparing them
Darkness, echoes, water sounds, wind, old structures, and poor visibility can all intensify feelings of unease or unease. However, these alone do not prove the existence of paranormal phenomena. It is important not to treat the impression of a place as the same as the verifiable conditions under which it can be used.
FAQ
If it's shown on the map, can I enter freely?
No. Inclusion on a map and permission to enter are separate things. It may be private property, a controlled area, a closed section, or off-limits at night.
If there are many rumors, does that constitute evidence of a paranormal phenomenon?
No, that's not acceptable. The amount of information and fact-checking are two different things. Any information that cannot be confirmed through primary sources or administrator information will be treated as unconfirmed.
Are there ways to enjoy it without actually going there?
You can compare publicly available documents and maps to investigate local history and the background of structures. There is no need to travel to dangerous times or locations.
Update policy and information provision
Map display and publication conditions may change. If you notice any errors, closures, name changes, etc., please let us know.inquiryPlease let us know. We will only update information that we have been able to confirm, and we will not turn rumors into facts.
Enjoy horror safely at home
How to read this article and safety precautions
" [2026 Latest] 9 Locations in the Koshinetsu Region with Rumors of Paranormal Activity in Tunnels | Organized with Maps and Safety Information This is an article compiled by the Horror Tales File editorial team as a story, based on publicly available information, rumors circulating in the community, and information submitted by readers. It does not definitively state the authenticity of paranormal phenomena.
- We do not recommend visiting restricted areas, private property, abandoned buildings, or dangerous locations at night.
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