It’s a little more complicated than that. Izanami and Izanagi both created a lot of gods together. They descended from the heavens and using a spear in the waters of creation, Izanagi created land. The both of them aren’t the original gods though.

Izanami and Izanagi are the last of the seven generations of gods, the Kamiyonanayo. Before them came the Kotoamatsukami, all coming into existence in solitude in Takamanohara at the creation of the universe.