Aoshima Shrine

Aoshima Shrine stands on Aoshima island in Miyazaki city, Miyazaki Prefecture, with the entire island—approximately 1.5 kilometres in circumference—designated as its shrine precincts. The shrine is known as a legendary site connected to the sea-palace narrative of Yamosachi-Hiko (Hiko-Hoho-demi-no-Mikoto) and Toyotama-Hime-no-Mikoto, and is recognised as a significant centre of the ancient Hyūga mythic tradition.

The island lies in Hyūga Bay, connected to the mainland by the Yayoi Bridge. Its tropical and subtropical flora are designated a Special Natural Monument, and the surrounding wave-cut platform known as "Oni-no-Sentakuita" (Demons' Washboard) is protected as a Natural Monument. Together with nearby Udo Grand Shrine (Nichinan, Miyazaki), Miyazaki Shrine (Miyazaki city), and Takachiho Shrine (Takachiho, Miyazaki), it forms a ritual landscape associated with Hyūga mythology.

The principal enshrined kami (shusaijin) are Hiko-Hoho-demi-no-Mikoto (Yamosachi-Hiko), with auxiliary enshrined kami Toyotama-Hime-no-Mikoto and Shinotsutsu-no-Okami. According to the *Kojiki* (Records of Ancient Matters, 712 CE), Yamosachi-Hiko journeyed to the sea palace of Watatsumi-no-Kami (the sea deity) to recover his elder brother's lost fishing hook, where he married Toyotama-Hime; Aoshima is traditionally identified as the place from which he returned to land. Hiko-Hoho-demi-no-Mikoto is the child of Ninigi-no-Mikoto and Konohana-Sakuya-Hime-no-Mikoto, belonging to the heavenly-descended lineage and serving as ancestor to Emperor Jinmu.

The founding date is unknown. Shrine tradition holds that the shrine was established to enshrine Hiko-Hoho-demi-no-Mikoto upon his return from the sea palace. The shrine appears in surviving fragments of the *Fudoki* (regional gazetteers, 8th c.) and in medieval Hyūga gazetteers. Until the Edo period, the island itself was treated as sacred ground and access was restricted; from the Meiji period onward, public visitation expanded. The shrine held village-shrine status and was later designated a shrine of the Association of Shinto Shrines.

Principal festivals include the Marine New Year celebration in January (involving ritual ablution in winter sea waters), the Summer Festival in July (island procession rite), and the Autumn Great Festival in October. The Marine New Year observance, featuring ritual ablution (misogi) in cold seawater, continues the sea-palace mythology in contemporary practice.