Origins · Evidence · Sources

Kaidan Files

An English-language guide to Japanese urban legends and mysterious places, with sources and evidence status shown for every story.

Latest records

30 records
Folklore

Doppelganger in Japan: The Double Said to Foretell Death

In Japanese folk belief, seeing your own double was read as an omen of death. A look at the Edo-period antecedents, the literary anecdotes, and the later school ghost stories.

Evidence
  • 6 Documented
  • 0 Contested
  • 1 Unverified
Folklore

Hanako-san: The Ghost Waiting in the Third Stall

Hanako-san is a Japanese school ghost story in which children knock on the third toilet stall to summon a girl. Encyclopedias trace the legend to around 1950, without a primary record.

Evidence
  • 6 Documented
  • 1 Contested
  • 1 Unverified
Folklore

Hannya: The Horned Mask of Jealousy and Grief

Hannya is a Noh mask of a woman transformed by jealousy and resentment. Its name is first documented in writings from the 1580s-1610s, and its origin story is disputed.

Evidence
  • 7 Documented
  • 1 Contested
  • 0 Unverified
Unknown

Hikiko-san: The Crawling Girl of Japan's Rainy Days

Hikiko-san is a Japanese urban legend about a girl who appears in the rain and drags children away. Its origin is undocumented; the only cited source is a 2007 book.

Evidence
  • 5 Documented
  • 1 Contested
  • 1 Unverified
Internet-born

Hitori Kakurenbo: Japan's Solo Hide-and-Seek Ritual

Hitori Kakurenbo is an online-born Japanese ritual legend traced to a detailed post on 2channel's occult board on 18 April 2007, later adapted into a 2009 horror film.

Evidence
  • 6 Documented
  • 1 Contested
  • 1 Unverified
Folklore

Jinmenken: The Human-Faced Dog Panic of 1989

Jinmenken, the human-faced dog of Japanese urban legend, swept the country in 1989 through magazines and television. Its documented ancestors go back to an 1810 Edo sideshow record.

Evidence
  • 6 Documented
  • 2 Contested
  • 0 Unverified
Folklore

Kamikakushi: when a village said the gods took someone

Kamikakushi is a Japanese folk belief that explains sudden disappearances as the work of kami or yokai. The folklorist Yanagita Kunio recorded several such tales in Tono Monogatari in 1909.

Evidence
  • 7 Documented
  • 0 Contested
  • 1 Unverified
Folklore

Kappa: The River Yokai With a Plate on Its Head

A plain-English guide to the kappa, Japan's water-dwelling yokai: what the folklore describes, the 1712 encyclopedia entry behind its earliest confirmed record, and what remains unsettled.

Evidence
  • 6 Documented
  • 1 Contested
  • 0 Unverified
Folklore

Kokkuri-san: Japan's coin-and-paper Ouija, explained

Kokkuri-san is a Japanese divination game played with a marked sheet of paper and a coin. English Wikipedia traces its arrival to an 1884 demonstration of Western table-turning at Shimoda.

Evidence
  • 6 Documented
  • 1 Contested
  • 0 Unverified
Internet-born

Kotoribako: The Cursed Box Born on a Forum

Kotoribako is a Japanese internet legend about a cursed wooden box, first recorded in a 2005 forum post. Folklore researchers treat it as fiction, and a novel reworked it in 2024.

Evidence
  • 6 Documented
  • 1 Contested
  • 0 Unverified
Folklore

Kubinashi Rider: Japan's Headless Motorcyclist Legend

The kubinashi rider is a Japanese urban legend about a motorcyclist beheaded by wire strung across a road. Its spread is tied to a 1974 Australian film, but its origin is unsettled.

Evidence
  • 7 Documented
  • 1 Contested
  • 0 Unverified
Internet-born

Kunekune: The Writhing White Shape in the Rice Field

Kunekune is a Japanese urban legend that English Wikipedia traces to a short horror story posted to 2channel in 2001: a slender white shape seen writhing in summer rice fields.

Evidence
  • 5 Documented
  • 1 Contested
  • 0 Unverified
Folklore

Nopperabo: The Faceless Encounter

Noppera-bo is a faceless figure recorded in Japanese kaidan collections from 1663 onward. Lafcadio Hearn's 1904 story "Mujina" made the image famous in English without ever naming it.

Evidence
  • 6 Documented
  • 1 Contested
  • 1 Unverified
Folklore

Okiku Ningyo: Hokkaido's Doll Whose Hair Is Said to Grow

Mannenji temple in Iwamizawa, Hokkaido keeps a doll bought in 1918 for a three-year-old girl. The claim that its hair keeps growing is temple tradition, not a verified physical fact.

Evidence
  • 4 Documented
  • 2 Contested
  • 1 Unverified
Folklore

Okuri-inu: The Dog That Follows You Home Through the Mountains

Okuri-inu is a Japanese folk tradition about a dog that follows travellers on night mountain paths, recorded in Edo-period books and early-Showa folklore collections under several regional names.

Evidence
  • 5 Documented
  • 3 Contested
  • 0 Unverified
Folklore

Shinigami: Japan's Death God Is Younger Than It Looks

Shinigami, Japan's "death god", is a traditional motif attested in Edo-period writing, but the scythe-carrying skeleton most readers picture has a separate Western history.

Evidence
  • 7 Documented
  • 0 Contested
  • 0 Unverified
Internet-born

Sugisawa Mura: Japan's Village That Never Existed

Sugisawa Mura is an internet-born Japanese urban legend about a village erased from the map. Its earliest confirmed record is an August 2000 magazine article; the village is not real.

Evidence
  • 5 Documented
  • 1 Contested
  • 1 Unverified
Folklore

Teketeke: The Legless Ghost That Runs on Her Elbows

Teketeke is a Japanese urban legend about a ghost with no lower body. A 2024 webMu article traces the earliest confirmable telling to Okinawa in 1980, not to the familiar railway version.

Evidence
  • 6 Documented
  • 2 Contested
  • 0 Unverified
Folklore

Tengu: Japan's Long-Nosed Mountain Spirit, Explained

A guide to the tengu, the winged mountain figure of Japanese folklore: its meteor-omen name, its earliest recorded use in 637, and how Buddhism turned it from demon into guardian.

Evidence
  • 7 Documented
  • 1 Contested
  • 0 Unverified
Folklore

Ushi no Kubi: The Story Too Scary to Finish

Ushi no Kubi is a Japanese tale known only by its title and its reputation. Its earliest documented appearance is a short story published in Sankei Sports on 8 February 1965.

Evidence
  • 6 Documented
  • 2 Contested
  • 0 Unverified
Folklore

Ushi-oni: The Ox-Headed Demon of Western Japan

Ushi-oni is a traditional yokai of western Japan, recorded in a 1251 chronicle entry and Edo-period scroll art, with forms and stories that change from region to region.

Evidence
  • 6 Documented
  • 2 Contested
  • 0 Unverified
Folklore

Yuki-onna: The Snow Woman of Japanese Folklore

Yuki-onna is a classical Japanese yokai recorded by the late Muromachi period and retold in English by Lafcadio Hearn. Here is what encyclopedic sources actually document about her.

Evidence
  • 6 Documented
  • 2 Contested
  • 0 Unverified
Folklore

Zashiki-warashi: Japan's Luck-Bringing House Child

Zashiki-warashi is a child-shaped house spirit recorded mainly in Iwate Prefecture, described in Yanagita Kunio's Tono Monogatari (1910) and still discussed today.

Evidence
  • 6 Documented
  • 0 Contested
  • 2 Unverified
Internet-born

Hasshaku-sama: The Eight-Foot-Tall Woman Born on a Forum

Hasshaku-sama is a tall female apparition from a 2008 post on 2channel's occult board. It later helped inspire Lady Dimitrescu in Resident Evil Village.

Evidence
  • 5 Documented
  • 1 Contested
  • 0 Unverified
Internet-born

Inunaki Village: The Lawless Village That Never Was

Inunaki Village is an internet-era legend about a lawless hidden village in Fukuoka. It grew on top of a real village flooded by a dam in 1986 and a real criminal case in 1988.

Evidence
  • 5 Documented
  • 2 Contested
  • 1 Unverified
Internet-born

Kisaragi Station: The Train Ride to Nowhere

Kisaragi Station is a fictional station from a 2004 live-reported 2channel post. It has since inspired two films, a song and souvenir tickets from Enshu Railway.

Evidence
  • 7 Documented
  • 1 Contested
  • 0 Unverified