Shikanoshima Island (志賀島) is an island in Higashi-ku, Fukuoka, Japan. The island is known as the spot where the Gold Seal of the King of Na, a national treasure, was discovered. The island is about 11 kilometres around and connected to the Umi no Nakamichi (road) on the mainland by a causeway.
On the hill that commands a view of Hakata Bay, two farmers found the golden seal in 1784. The area was developed into a park to commemorate the discovery, and designated Kin-in Park. According to Chinese chronicles, about 2,000 years ago, the Emperor Guangwu of Han, a dynasty of ancient China, granted an envoy from Japan a golden block seal, which was to be presented to the envoy’s king. The seal was engraved with the characters 「漢委奴国王」”(Han wa na koku-ō”), meaning “[From the King of] Han, presented to the King of Nakoku”. The seal can be seen in the Fukuoka City Museum.
It is home to Shikaumi Jinja, a Shinto shrine located on Shikanoshima island where the Azumi people used to live.
The shrine has historical connections to foreign wars because it was the place from which Empress Jingū launched her invasion of Korea, and it was also a site of conflict during the Mongol invasions of Japan.
The Azumi people traditionally followed the sea God, Watatsumi. The Shrine is considered their ancestral shrine and honors their god Watatsumi.
The shrine is taken care of by a priest who is believed to be a descendant of the Azumi clan. The biennial gojinkosai ceremony held at the shrine is recognized as an intangible cultural property by the prefecture.
The shrine, incorporates a deer motif in its rituals and designs. The deer motif is significant to the Azumi people and their beliefs, and is a common feature in the historic culture of the region.
https://ja.wikipedia.org/wiki/%E5%BF%97%E8%B3%80%E6%B5%B7%E7%A5%9E%E7%A4%BE