500
This is where the following quote is from, "At the beginning of heaven and earth, seven generations of deities (kami) came into existence, including Izanagi and Izanami, the primal male and female. Other deities commanded these two to create land. And so, churning the sea with Izanagi’s spear, they created an island from the brine that dripped from the spear."
What is the Shinto Creation Myth?