Old Inunaki Tunnel

Construction of the original Inunaki Tunnel began in 1926 during the Taishō era to connect the rural agricultural towns of Miyawaka and Hisayama through the rugged Inunaki mountain pass. Completed in 1949, the single-lane stone and concrete tunnel served regional traffic for nearly three decades. However, its narrow dimensions, sharp curves, and lack of internal lighting made it notoriously hazardous for modern vehicles.

In 1975, the Fukuoka Prefectural Government opened the new, modern Inunaki Tunnel nearby, bypassing the old mountain road entirely. The old tunnel was decommissioned and left without maintenance. Over the next decade, the abandoned structure became a magnet for illegal street racing, vandalism, and youth gang gatherings.

Tragedy struck on December 6, 1988, when a 20-year-old factory worker named Umeyuki Naruhisa was abducted at a nearby intersection by five young gang members who demanded his car. When Naruhisa refused, the youths tortured him, dragged him into the abandoned Old Inunaki Tunnel, poured gasoline over him, and burned him to death. Following the gruesome murder and a sequence of fatal car crashes on the winding approach road, authorities permanently sealed both entrances of the old tunnel with massive concrete blocks.

The most infamous urban myth associated with the pass concerns 'Inunaki Village' ('Inunaki-mura'). Popularized on early Japanese internet forums, folklore asserts that a secluded, self-governing community exists hidden deep within the mountain wilderness beyond the abandoned tunnel. Legend tells that during the Edo era, residents severed ties with civil authorities to form an isolated settlement. A famous signpost near the overgrown portal allegedly warned travelers that national laws ceased to apply beyond that boundary. According to urban tales, outsiders trespassing into this domain face relentless pursuit by aggressive villagers wielding axes and farming tools.

Another persistent legend focuses on an isolated red phone booth positioned close to Inunaki Bridge. Local folklore claims that precisely at two o'clock in the morning, the payphone rings unexpectedly. Answering the receiver reveals a disembodied voice weeping softly before whispering a deadly omen. Drivers who receive this ghostly call are said to suffer fatal vehicular accidents along the mountain roads shortly thereafter.

A much older traditional tale explains the origin of the name 'Inunaki' (meaning 'dog howling'). Centuries ago, a hunter reportedly killed his beloved hound in a fit of frustration after the animal barked incessantly during a hunt. Moments later, the hunter discovered a massive venomous serpent poised to strike him from behind. Devastated by his mistake, the man abandoned his weapons to join a monastic order, but locals claim the mournful howls of the loyal hound continue to echo through the dense woods.

Despite the tunnel being blocked by heavy concrete barricades, urban explorers and paranormal researchers visiting the perimeter document chilling supernatural reports. Visitors walking up the abandoned, overgrown approach road report hearing the disembodied sound of a man screaming in agony from inside the sealed stone structure, echoing the horrific 1988 murder.

Drivers on the surrounding mountain road frequently report sudden, unexplained engine stalls, headlight failures, and electronic GPS glitches near the approach turnoff. Photographers routinely document strange white spectral figures, red orb lights, and the distinct imprint of bloody handprints appearing on the concrete barrier blocks sealing the tunnel entrance. Police routinely patrol the area to deter trespassers. Many visitors also report hearing faint dog howls, disembodied weeping, and feeling a bone-chilling cold wind moving through the trees. Visitors also describe experiencing an overwhelming feeling of suffocating claustrophobia near the concrete wall. Investigative equipment often records severe radio frequency interference and unexplainable electromagnetic spikes near the barricades.

Old Inunaki Tunnel is a narrow, single-lane arched masonry tunnel measuring less than 100 meters in length, carved through the granite rock of Mount Inunaki. The interior walls consist of rough-hewn stone and deteriorating concrete linings covered in thick moss, water stains, and dark graffiti.

Both the eastern and western portals are blocked by massive walls built from heavy rectangular concrete blocks stacked nearly to the arched ceiling, leaving only a tiny ventilation gap at the top. The surrounding approach road is narrow, heavily overgrown with mountain vegetation, and strewn with rockfall debris, fallen branches, warning signboards, and security fencing.

Old Inunaki Tunnel is located in Miyawaka, Fukuoka Prefecture, accessible via Route 21 between Fukuoka City and Kitakyushu. While tourists can view the new Inunaki Tunnel from public highways, approaching or attempting to climb over the concrete barricades of the Old Inunaki Tunnel is strictly illegal, extremely dangerous, and enforced by Fukuoka Prefectural Police.

Visitors exploring the surrounding mountain area must stay on paved public roads and exercise extreme caution due to rockfalls, venomous snakes, and lack of cell phone reception. Facilities in the immediate mountain pass are non-existent, so travelers should prepare thoroughly beforehand with food, water, flashlights, emergency supplies, and warm clothing.

Old Inunaki Tunnel's reputation as Japan's ultimate haunted tunnel stems from the horrific 1988 murder that occurred inside its walls, combined with the viral internet legend of Inunaki Village and its sealed concrete entrance, which has inspired popular horror films, manga, documentaries, and dark folklore studies across Japan, East Asia, and the global paranormal community. This creates a legendary dark location in Japanese urban mythology.