Itsukushima(厳島?) is an island in the western part of the Inland Sea of Japan, located in the northwest of Hiroshima Bay. It is popularly known as Miyajima(宮島?), the Shrine Island. The island is one of Hayashi Razan's Three Views of Japan. Itsukushima is part of the city of Hatsukaichi in Hiroshima Prefecture. The island was the town of Miyajima before the 2005 merger with Hatsukaichi.
Itsukushima is famous for the Itsukushima Shrine, a UNESCOWorld Heritage Site. According to records, the shrine was established in the time of Empress Suiko. The warrior-courtier Taira no Kiyomori gave the shrine its present form. In 1555, Mōri Motonari defeated Sue Harukata at the Battle of Miyajima. Toyotomi Hideyoshi built a large building, the Senjō-kaku, on a hill above the shrine.
On November 3, 2005 Miyajima, along with the town of Ōno, also from Saeki District, was merged into the city of Hatsukaichi.
As of 2003, the town had an estimated population of 2,018 and a density of 66.40 persons per km². The total area was 30.39 km².
In August 2004, both Hatsukaichi and the city of Hiroshima expressed an interest in annexing the town. The people in Miyajima supported Hatsukaichi. A committee for discussing the merger was created as soon as possible and the town was amalgamated with the city of Hatsukaichi on November 3, 2005.