Tsushima Island is an island of the Japanese archipelago situated in-between the Tsushima Strait and Korea Strait, approximately halfway between Kyushu and the Korean Peninsula. The main island of Tsushima, once a single island, was divided into two in 1671 by the Ōfunakoshiseto canal and into three in 1900 by the Manzekiseto canal. These canals were driven through isthmuses in the center of the island, forming "North Tsushima Island" (Kamino-shima) and "South Tsushima Island" (Shimono-shima). Tsushima also incorporates over 100 smaller islands, many tiny. The name Tsushima generally refers to all the islands of the Tsushima archipelago collectively. Administratively, Tsushima Island is in Nagasaki Prefecture.

Izanami (イザナミ), formally referred to with the honorific Izanami-no-Mikoto , is the creator deity of both creation and death in Japanese mythology, as well as the Shinto mother goddess. She and her brother-husband Izanagi are the last of the seven generations of primordial deities that manifested after the formation of heaven and earth. Izanami and Izanagi 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. In mythology, she is the direct ancestor of the Japanese imperial family.