Tokoyo
, also known as the , or Taikaikan, is a place in the Shinto religion where nothing changes that is believed to be the world of the gods and ancestral spirits. It is said to be a place of eternal youth where people never age. The location of Tokoyo varies between stories. Sometimes it is underwater, in others underground, and in others in the sky. Interpretations have varied as to whether it is good or bad. There are various stories about Tokoyo in classic texts such as the Kojiki and Nihongi. Motoori Norinaga classified three types of Tokoyo: a world of perpetual darkness, a world of eternal youth, and a world across the sea.