In Japanese mythology, Takamagahara (高天原, "Plane of High Heaven" or "High Plane of Heaven", also read as Takaamanohara, Takamanohara, Takaamagahara, or Takaamahara), is the abode of the heavenly gods (amatsukami). Often depicted as located up in the sky, it is believed to be connected to the Earth by the bridge Ame-no-ukihashi (the "Floating Bridge of Heaven").
In Shinto, ame (heaven) is a lofty, sacred world, the home of the Kotoamatsukami. Some scholars have attempted to explain the myth of descent of the gods from the Takamagahara as an allegory of the migration of peoples. However, it is likely to have referred from the beginning to a higher world in a religious sense. A Shinto myth explains that at the time of creation, light, pure elements branched off to become heaven (ame). Heavy, turbid elements branched off to become earth (tsuchi). Ame became the home of the amatsukami or gods of heaven, while tsuchi became the home of kunitsukami or gods of the land. The amatsukami are said to have descended from heaven to pacify and perfect this world.Basic Terms of Shinto, Kokugakuin University, Tokyo 1985 p.2.
In the beginning of the Kojiki (Records of Ancient Matters), Takamagahara is mentioned as the birthplace of the gods. It is assumed that Takamagahara existed in clouds above sea because there is a scene in which Kuniumi (国生み), the god of islands, lowers his spear to form an island. Also, when the Goddess of the sun, Amaterasu (天照大御神) was born, she was commanded to rule Takamagahara by Izanagi (伊弉諾), the creator deity of creation and life. In the part related to Susanoo (スサノヲ, the brother of Amaterasu), Takamagahara is described as the place where many gods live with Ama-no-yasukawa (天の安河), Ama-no-iwato (天岩戸), paddy fields, and a place for weaving, giving an impression that life was close to the human world. It is stated that the Ashihara-no-Nakatsukuni (葦原の中つ国, the world between Heaven and Hell) was subjugated by the gods from Takamagahara, and the grandson of Amaterasu, Ninigi-no-Mikoto (瓊瓊杵尊), descended from Takamagahara to rule the area.