In Japanese mythology, the Age of the Gods (神代 Kamiyo or Jindai?) is the period preceding the accession of Jimmu, the first Emperor of Japan. The kamiyo myths are chronicled in the "upper roll" (Kamitsumaki) of the Kojiki and in the first and second chapters of the Nihon Shoki. The reigns of Emperor Jimmu and the subsequent monarchs are considered the Human Age (人代 Hitoyo?).
According to early mythology, the Japanese islands were created by Izanagi and Izanami, meaning "he who invites" and "she who invites". They find themselves on a heavenly golden bridge staring down at earth and its oceans. With their jeweled spear, called Amenonuhoko, given by the gods or kami before them, they dip the spear into the ocean, creating the islands of Japan, Onogoro Island (“spontaneous-congealed island”). Descending down from the skies, Izanagi and Izanami create their home and create a central Heavenly August pillar. Deciding to populate the land, Izanagi circles the left side of the pillar while Izanami circles the right. Meeting each other on the other side of it, Izanami greets her love “oh, what a comely young man.” Izanagi replies with” How delightfully, I have met a lovely maiden.” Izanami being a woman speaking first to a man, the gods looked at this as inappropriate and cursed the couple by the children they bore. Their first child Hiruko was born hideous and cast out for its atrocity. Trying and trying again, they fail to conceive a proper child. The gods explain to them both about their curse and decide to give them another chance. Once again Izanagi and Izanami circle the pillar just as before, only Izanagi speaks first. Their mating now was fruitful. Izanami gave birth to the islands of Awaji, Iyo (later Shikoku), Oki, Tsukushi (later Kyūshū), Iki, Tsushima, Sado, and finally Yamato (later Honshū), the largest. They named the land Oyashimakuni, the Land of Eight Great Islands. After that, Izanami gave birth in quick succession to the other minor islands that surround the main ones, and to the main kami of sea and harbor, of wind, trees, mountains, and so on.