What Did Ancient Japanese Believe Was Beneath Japan? | Documentary For Sleep

Now on Spotify 🎧 Listen here: https://open.spotify.com/show/033Kcgn9MvUZnvXK7B8k71 Ancient Japan did not imagine the world of the dead as a simple emptiness. Beyond the familiar landscape of mountains, caves, villages, and islands, mythology described hidden realms where the boundary between the living and the dead could become terrifyingly thin. This video explores Yomi, the shadowy realm of death described in early Japanese texts such as the Kojiki and Nihon Shoki. In the famous myth of Izanagi and Izanami, the goddess Izanami descends into Yomi after her death, and Izanagi follows in an attempt to bring her back. But what he finds is not reunion. It is decay, fear, taboo, and a world the living were never meant to see. The story also follows Ne no Kuni, a mysterious hidden land associated with Susanoo and the deeper edges of Japanese myth. These realms were not always mapped in a simple physical way beneath Japan, but they were connected to extraordinary passages in the landscape — caves, slopes, mountains, and sacred boundaries where the visible world seemed to open into something older and more dangerous. The documentary examines why crossing into these places carried such risk. In Japanese tradition, death was not only an ending, but a source of impurity, transformation, separation, and supernatural power. To enter the hidden realm was to break a boundary that protected the living from what belonged beyond life. This is not a story about a literal underground civilization beneath Japan. It is about what ancient Japanese people imagined existed beyond the human world — who waited there, why the dead could not simply return, and why some doors, once opened, were never meant to be crossed. If you feel like sharing, mention where you’re watching from and what time it is there — then imagine a cave entrance at dusk, with the living world behind you and the unseen realm of Yomi waiting somewhere past the dark. Sources: Kojiki — Record of Ancient Matters: https://kojiki.kokugakuin.ac.jp/kojiki-en/ Nihon Shoki — Chronicles of Japan: https://en.wikisource.org/wiki/Nihongi Yomi — Encyclopedia of Shinto, Kokugakuin University: https://d-museum.kokugakuin.ac.jp/eos/detail/?id=8639 Ne no Kuni — Encyclopedia of Shinto, Kokugakuin University: https://d-museum.kokugakuin.ac.jp/eos/detail/?id=8735 Inome Cave and the Entrance to Yomi — Shimane Prefecture: https://www.pref.shimane.lg.jp/life/bunka/bunkazai/shiseki/sanninshisekinwkaigi/shiseki-exploration/inomedoukutu.html