Okinoshima is a small, sacred island located in the Genkai Sea of Japan. It is part of Munakata Taisha, a significant Shinto shrine complex. The island is known for its rich cultural heritage and is home to numerous ancient artifacts, including offerings to the deities worshipped there. Access to Okinoshima is restricted, with only a limited number of visitors allowed each year to preserve its sanctity. The island was designated a UNESCO World Heritage Site in 2017, highlighting its importance in the history of Japanese spirituality and maritime trade.