Osake Shrine is located in the foothills overlooking Sakoshi Bay. The main deity worshipped at the shrine is Hata no Kawakatsu. According to legend, he landed on Ikishima Island in the past, an event which connected his spirit to the people of Sakoshi. Though it is not clear exactly when the shrine was established, it was important enough to have been counted among the 24 main shrines in the former Harima Province from around the late Heian period to the early Kamakura period. In the Edo period, Sakoshi saw great prosperity resulting from the shiokaisen (merchant ships carrying salt from the Seto Inland Sea area to the rest of Japan) and its location along the nishimawari koro, a maritime shipping route that went from Osaka to Hokkaido via the Sea of Japan. As a result, many repairs were made to the shrine grounds during this time, including the reconstruction of the main shrine, hall of worship, and main gate. In the same period, merchant ship traders donated various items, including funaema, stone lanterns, and torii, in the hopes that their ships would be protected at sea. Of these items, the funaema the shrine received in Kyowa 7 (1722) is valued for being a particularly old example of its type. The items belong to a group of cultural properties designated in May of Heisei 30 (2018) as Japan Heritage and entitled “The Kitamae-Bune Sea Routes” (kitamae-bune refers to the merchant ships that traveled along the nishimawari koro).