Ōzu Island

, or Ozu Island, is an inhabited island in the Inland Sea, Japan. Administratively, it forms part of the city of Shūnan, Yamaguchi Prefecture. Ōzushima is also known as "Kaiten Island".

==Geography== Situated in the Seto Inland Sea across the exit from Tokuyama Bay and formerly two islands, Ōzushima and are said to have become one some four hundred years ago. Gently curved, long, and thin, and with a outline that somewhat resembles a misshapen Y, today's Ōzushima extends some from north to south, and has an area of . There are a number of small settlements along the coast, including and , the centres for the island's masons and stoneworkers, the farming communities of and , and the fishing hamlets of and . Parks on the island include Ōzushima Park and Mashima Park, while part of the island and its surrounding waters is protected within Setonaikai National Park. The southern coastline is suffering from severe coastal erosion.