Yomi or Yomi-no-kuni is the Japanese word for the land of the dead. According to Shinto mythology as related in Kojiki, this is where the dead go in the afterlife. Once one has eaten at the hearth of Yomi it is (mostly) impossible to return to the land of the living. Yomi is most commonly known for Izanami's retreat to that place after her death. Izanagi followed her there and upon his return he washed himself, creating Amaterasu, Susanoo, and Tsukuyomi-no-Mikoto in the process.

The underworld, also known as the netherworld or hell, is the supernatural world of the dead in various religious traditions and myths, located below the world of the living. Chthonic is the technical adjective for things of the underworld.