Izanagi

Izanagi (イザナギ) or Izanaki (イザナキ) is a creator deity (kami) in Japanese mythology. He and his sister-wife Izanami are the last of the seven generations of primordial deities that manifested after the formation of heaven and earth. Izanagi and Izanami are held to be the creators of the Japanese archipelago and the progenitors of many deities, which include the sun goddess Amaterasu, the moon deity Tsukuyomi and the storm god Susanoo.
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The Kojiki portrays Izanagi and his younger twin sister Izanami as the seventh and final generation of deities that manifested after the emergence of the first group of gods, the Kotoamatsukami, when heaven and Earth came into existence.[9]

Receiving a command from the other gods to solidify and shape the Earth (which then "[resembled] floating oil and [drifted] like a jellyfish"), the couple use a jewelled spear to churn the watery chaos. The brine that dripped from the tip of the spear congealed and turned into an island named Onogoro (淤能碁呂島). The two descended to the island and, setting up their dwelling, erected a 'heavenly pillar' (ame no mihashira) on it. Izanagi and Izanami, realizing that they were meant to procreate and have children, then devised a marriage ceremony whereby they would walk in opposite directions around the pillar, greet each other and initiate intercourse. After Izanami greeted Izanagi first, Izanagi objected that he, the man, should have been the first to speak. True enough, the first offspring that resulted from their union, the 'leech-child' Hiruko, was considered imperfect and set adrift on a boat of reeds. Izanagi and Izanami then also begat the island of Awa (淡島 Awashima), but this too was not counted among their rightful progeny.

The 'Eight Great Islands' (大八洲 Ōyashima) of Japan begotten by Izanami and Izanagi
Izanagi and Izanami then decided to repeat the ritual, with Izanagi greeting Izanami first. This time, their union was a success, with Izanami giving birth to some of the various islands that comprise the Japanese archipelago (with the notable exceptions of Shikoku and Hokkaido), which include the following eight islands (in the following order):

Awaji-no-Ho-no-Sawake (淡道之穂之狭別島)
The double-named island of Iyo (伊予之二名島 Iyo-no-Futana-no-Shima, modern Shikoku)
The triple islands of Oki (隠伎之三子島 Oki-no-Mitsugo-no-Shima)
Tsukushi (筑紫島, modern Kyushu)
Iki (伊伎島)
Tsushima (津島)
Sado (佐度島)
Ōyamato-Toyoakitsushima (大倭豊秋津島, modern Honshu)