Itsukushima Shrine occupies the shore of an island in Hiroshima Bay long regarded as sacred. Tradition places its foundation in 593, although the present shrine’s historical development is clearer from the later Heian period. Worship centered on three female deities associated with the sea, navigation, and the Munakata cult. Because the island itself was treated as a divine body, buildings were placed over the tidal flats rather than deep within the land. Approaching worshippers could see the complex appear to float between mountain and sea at high tide.

Taira no Kiyomori, the powerful twelfth-century warrior and court leader, sponsored a major reconstruction around 1168. The connected halls and corridors adapted the elegant shinden style of aristocratic residences to a maritime shrine. Kiyomori’s family traded through the Inland Sea and honored Itsukushima as a protector of navigation and political fortune. Members of the imperial court donated manuscripts, music, and works of art, including the lavishly decorated Heike Nōkyō sutras. Court ceremony was thus transplanted from Kyoto into a coastal sacred landscape.

The complex includes the main sanctuary, subsidiary shrines, stages for bugaku dance and Noh drama, bridges, lanterns, and an offshore torii marking the ritual approach. Most standing buildings postdate Kiyomori because fire, storm, tide, and warfare demanded repeated rebuilding. The great torii has been replaced many times; its massive pillars stand by their own weight rather than being deeply fixed into the seabed. Carefully calculated floor levels and drainage allow ordinary tides to pass beneath the shrine, though exceptional storm surges can still cause serious damage.

The island also entered military history. In 1555, Mōri Motonari defeated Sue Harukata at the Battle of Miyajima and later supported reconstruction and purification of the shrine. During the early modern period, pilgrimage expanded and the nearby town served visitors. Rules associated with ritual purity restricted death and childbirth on the island, contributing to the separation of settlement and cemetery functions. Buddhist temples also flourished there until the Meiji government’s separation of Shinto and Buddhism in the nineteenth century altered institutions and removed some shared religious elements.

Itsukushima remains an active shrine whose preservation depends on renewal rather than the survival of untouched twelfth-century timber. Craftspeople periodically replace roofs, boards, paint, metal fittings, and structural members while retaining traditional forms and techniques. Major restoration of the torii completed in the 2020s followed damage and prolonged exposure. UNESCO inscribed the shrine in 1996, recognizing the designed relationship among architecture, sea, and Mount Misen. Its historical identity comes from continuity across change: elite patronage, maritime worship, performance, battle, pilgrimage, and recurring material replacement have sustained the same sacred composition for centuries.