| Description |
Okinoshima has long been venerated as part of the Munakata faith. The small island, less than one square kilometer in size, lies about 48 kilometers off the coast of Oshima. Located between Japan and the Korean Peninsula, it was used as a navigational landmark by seafarers and worshipped. Archaeological surveys have uncovered a wealth of artifacts, which attest to the development of ritual practices on the island from the fourth to the ninth century and provide valuable insight into the country’s early ritual traditions and foreign relationships.
The faith
According to the Nihon shoki (The Chronicles of Japan), compiled in the early eighth century, the sun deity Amaterasu Omikami commanded her divine offspring, the Three Female Deities of Munakata, to guard the sea routes between Japan and the Asian mainland across the Genkai Sea. In return, emperors revered and worshipped them. Each deity was enshrined at one of the three Munakata Taisha shrines: Okitsu-miya on Okinoshima, Nakatsu-miya on Oshima, and Hetsu-miya on the mainland.
The Munakata clan governed northwestern Kyushu and oversaw rituals on Okinoshima. They are mentioned in Japan’s earliest written records from the early eighth century, though their rise to prominence likely predated these texts. By the seventh century, the clan held hereditary positions as both district administrators and high priests. They maintained these duties until the family line ended in the late sixteenth century.
Evolution of ritual practices
Rituals on Okinoshima evolved through distinct phases between the fourth and ninth centuries, marked by the placement of votive offerings at key sites. Artifacts such as mirrors, beads, swords, gilt-bronze ornaments, and imported glassware from as far away as the Middle East reveal the island’s connections to continental trade and diplomacy. The origins of offerings changed throughout the centuries, reflecting shifts in political, economic, and cultural conditions in the Munakata region; Japan’s relationship with the Asian mainland; and the development of maritime networks.
Rituals were performed around large rocks near the island’s center. In the earliest phases, offerings such as mirrors and iron ingots were ceremonially placed directly on top of boulders, covered or surrounded by stones. Over the following centuries, offerings were deposited in the shadows of the rocks, beneath overhangs, or in partially shaded areas. By the ninth century, votive objects were offered in open clearings near the present Okitsu-miya.
This transition from natural to constructed ritual spaces illustrates the evolution of Japan’s early religious practices from nature worship to the organized practices that came to be described as “Shinto.” Offerings also changed in form—from weapons and jewelry to miniature representations of weaving tools and musical instruments in the eighth century, and finally to figurines of humans, horses, and boats in the ninth.
More than 80,000 artifacts have been uncovered on Okinoshima. Their remarkable preservation is owed to long-standing taboos that, with few exceptions, forbade entry to the island. Many of these artifacts predate Japan’s earliest written histories. The findings demonstrate the Munakata faith’s central role in regional and international exchange, as well as the prestige the Munakata clan enjoyed among Japan’s early rulers. The entire body of artifacts is preserved, and a selection is displayed in the Shimpokan Museum on the grounds of Hetsu-miya on the mainland.
Okinoshima and Oshima
Equivalent ritual objects have been found on Okinoshima and the summit of Mt. Mitake (224 m), the highest point on Oshima. The similarity of the artifacts indicates that rituals on Mt. Mitake were conducted contemporaneously with Okinoshima’s later ritual phases and that ceremonial practices were gradually transferred from Okinoshima to Oshima over time.
Although the practice of leaving offerings on Okinoshima ceased in the ninth century, worship of the enshrined deity continued. After the end of the Munakata lineage in the sixteenth century, the focus of ritual activity gradually shifted from Okinoshima to Oshima. Oshima came to be known as the Guardian Island, functioning as a protective intermediary site at the closest point of approach to the sacred Okinoshima. Okitsu-miya Yohaisho, a hall oriented toward Okinoshima on Oshima’s northern coast, continues to be a place where the island’s deity may be venerated at a distance.
UNESCO World Heritage inscription
In 2017, Okinoshima and related sites were inscribed as the “Sacred Island of Okinoshima and Associated Sites in the Munakata Region” on the UNESCO World Heritage List. The inscription includes the sacred island of Okinoshima, the associated sites of Munakata Taisha—Okitsu-miya, Okitsu-miya Yohaisho, Nakatsu-miya, and Hetsu-miya—and the Shinbaru–Nuyama Mounded Tomb Group. It is recognized as an exceptional example of the cultural tradition of worshipping a sacred island, as it has evolved amidst a process of dynamic overseas exchange in East Asia and as it has been passed down to the present day. |