The gods enshrined here are the three Sumiyoshi deities: Sokotsutsu-no-o, Nakatsutsu-no-o and Uwatsutsu-no-o. The shrine is also listed in the Engishiki, the great tenth-century register of shrines, which tells you it was already of national standing in ancient times. These gods are worshipped for safe voyages and the protection of ships. Their origin story comes from Japan's oldest chronicles, the Kojiki and the Nihon Shoki. After the god Izanagi returned from the land of the dead, he purified himself by the water at a place in Tsukushi. The three Sumiyoshi gods were born in that cleansing, together with the three sea gods known as the Watatsumi. Later, in the tale of Empress Jingu's expedition to Korea, the Sumiyoshi god spoke through the empress and helped the campaign succeed. This is where the shrine's big claim comes in. Over 2,300 Sumiyoshi shrines exist across Japan, and the grand shrine in Osaka is usually treated as the head shrine. But an old Osaka text, the Sumiyoshi Taisha Jindaiki, names a great deity of Tsukushi as the source of the Sumiyoshi worship, and that points to this very region. So some people regard this shrine as the origin of them all. It is also counted among the Three Great Sumiyoshi shrines, alongside the ones in Osaka and in Shimonoseki.