Kuniumi
In Japanese mythology, the creation of Japan (国産み, Kuniumi, literally "birth or formation of the country") is the traditional and legendary history of the emergence of the Japanese archipelago as narrated in the Kojiki and Nihon Shoki. According to this legend, after the creation of Heaven and Earth, the gods Izanagi and Izanami were given the task of forming a series of islands that would become what is now Japan. In Japanese mythology these islands make up the known world. The creation of Japan is followed by the creation of the gods (kamiumi).
Creation story
According to the Kojiki
After the formation, the Heaven was above and Earth was still a drifting soft mush. The first five gods named Kotoamatsukami (別天津神, "Separate Heavenly Deities") were lone deities without gender and did not procreate. Then came the Kamiyonanayo (神世七代, "The Seven Divine Generations"), consisting of two lone deities followed by five couples. It was the last couple, Izanagi and Izanami that gave earth its solid form and first procreated other gods.