Ne-no-kuni (, lit. "Land of roots; Land of origin") or Soko-tsu-ne-no-kuni (?, lit. "Distant land of roots") in the Nihon Shoki, also called Ne-no-kata-su-kuni (, lit. "Borderland of roots) or Haha-no-kuni (, lit. "Land of my late mother") in the Kojiki, refers to a netherworld in Japanese mythology. It is sometimes considered to be identical to Yomi another netherworld in the myths as well as Tokoyo-no-kuni (, lit. "Eternal land"). However, there is no clear consensus on the relationship between these three realms.
The god Susanoo is described as the ruler of Ne-no-kuni. There are differing accounts on how he assumed this position:
According to the Kojiki when Izanagi tasked his children with the rule over the various realms: Amaterasu got the "Plain of the High Heaven" (Takama-ga-hara), Tsukuyomi got the "Dominion of the Night" (Yoru-no-wosu-kuni), and Susanoo got the "Sea Plain" (. However, Susanoo ignored this command and kept crying over the loss of his dead mother Una-bara)Izanami, such that his weeping lead to death and destruction. As Susanoo wished, Izanagi expelled him to be near his mother in Ne-no-kata-su-kuni. In the previous episodes about Izanami's death this land is called Yomi.
The Nihon Shoki mentions Ne-no-kuni in passing when describing an episode where Susanoo was banished from Takama-ga-hara for various evil acts he committed, and went to a place called (Soko-tsu-)Ne-no-kuni.
According to the Kojiki when ?kuninushi visited Ne-no-kuni and insulted Susanoo he was submitted to overcome three ordeals, one being described to sleep in a house infested with snakes, centipedes and wasps. This is sometimes taken as another hint that Ne-no-kuni is a subterranean realm. One explanation of the myth contrasts the trials of ?kuninushi to a symbolic death through rites of initiation that cause one to become reborn into a new life. In this story, death doesn't pollute, it regenerates. The land of the dead also contains the forces of life, tama.
The Michiae no matsuri () norito is an ancient Shinto prayer asking the gods to prevent the evil beings from Ne-no-kuni-Soko-no-kuni (?) to do any harm. The Minatsuki no tsugomori no ?harae (no norito) (), also short ?harae no kotoba (), which is performed in the great purification (harae) ceremony of the sixth month locates Ne-no-kuni-Soko-no-kuni in the "Great Sea Plain" (, i.e. the ocean. ?-una-bara)