1. Myth & Prehistory

    Undated myths and BC Entries: 49

    Gods and mythical beasts of world mythology, ancient ruins and legends from before recorded history.

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  2. Ancient Japan

    to 793 (through the Nara period) Entries: 30

    Legends recorded in the Kojiki, Nihon Shoki and provincial gazetteers, ancient ruins and other mysteries up to the Nara period.

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  3. Heian Period

    794–1184 Entries: 18

    The age of oni, vengeful spirits and onmyoji: Shuten-doji, the nine-tailed fox, the vengeful ghosts of Sugawara no Michizane and Taira no Masakado, and other mysteries of the Heian capital.

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  4. Kamakura to Sengoku

    1185–1602 Entries: 44

    Yokai and strange tales from the age of the samurai, alongside the mysterious books and legends of medieval Europe, from the Kamakura period to the Warring States era.

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  5. Edo Period

    1603–1867 Entries: 82

    The era when Toriyama Sekien's yokai paintings and ghost stories such as Yotsuya Kaidan flourished, and countless yokai were depicted in art and tales.

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  6. 1868–1945

    1868–1945 Entries: 44

    From the age of The Legends of Tono to the days when Nessie and the coelacanth made headlines around the world: mysteries from the Meiji era to the end of World War II.

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  7. Postwar Showa

    1946–1988 Entries: 77

    The UFO boom, the tsuchinoko and lake monster crazes, the Slit-Mouthed Woman, and other mysteries that captivated Japan from the postwar years to the end of the Showa era.

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  8. Heisei & Reiwa

    1989–present Entries: 50

    Scary stories born on internet forums, the filming of deep-sea creatures, UAP hearings and other mysteries from 1989 to the present.

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