“Sankyo Tunnel” (三共トンネル) turns up occasionally in Japanese ghost-story aggregator sites, usually as a passing mention. We could not find a source that reliably places it in a specific prefecture, names the road it served, or documents when it was built.
What turned up instead
Searches mostly surfaced unrelated, much better documented haunted-tunnel stories — the Old Sōya Tunnel in Mie Prefecture (site of a real 1971 Kintetsu Osaka Line collision that killed 25), the Old Fukiage Tunnel, and various other regional “cursed tunnel” entries. None of these are the Sankyo Tunnel.
What we could not verify
- Location: No prefecture or road designation confirmed.
- Construction history: No dates or public-works records found.
- Any accident or death: No named incident or news record.
- Firsthand accounts: What exists reads as generic ghost-story boilerplate.
It's possible “Sankyo Tunnel” is real but very obscure, or a confusion with an unrelated corporate facility (三共/Sankyo is also a former pharmaceutical company name). We are marking this entry as unverified rather than inventing a history.
Can you visit: Unknown — without a confirmed location, we cannot provide access information.
As an Amazon Associate, this site earns from qualifying purchases.
Comments