Known as part of Itsukushima Shrine, Okuni-jinja Shrine is deeply rooted in Japanese mythology. Okuni Shrine enshrines Okuninushi no Mikoto, the chief deity of Izumo Taisha Shrine in Shimane Prefecture. This deity is known not only as the god of land creation and fertility, but also for his broad range of blessings, including matchmaking, medicine, and prosperity. The background of his enshrinement on the sacred island of Itsukushima symbolizes the harmony of the gods with the three principal deities of Munakata (Ichikishimahime-no-mikoto, Tashinohime-no-mikoto, and Oshizuhime-no-mikoto), the original principal deities of Itsukushima Shrine. In this way, it is believed that Okuninushi no Mikoto plays a complementary role in protecting the land and the prosperity of the people. Historically, the construction of Okuni Shrine is believed to have been a natural development in the process of developing the sacred area of Itsukushima Shrine. During the mid-Heian period, when the construction of Itsukushima Shrine was in full swing, the entire island was considered sacred as a central place of worship. In this context, Okuni Shrine also played an important role as a place of prayer for the common people's beliefs and agricultural deities of the region. Especially during the Edo period, many visitors to Itsukushima Shrine began to pay homage to Okuni Shrine at the same time, and the shrine's status as a shrine dedicated to Okuninushi no Mikoto is said to have been further enhanced by this influence.