Ojika (小値賀町 Ojika-chō?) is a town located in Kitamatsuura District, Nagasaki Prefecture, Japan. It covers the island of the same name Ojika, located north of Gotō Islands. As of January 1, 2009, the town has an estimated population of 2,924 and a density of 115 persons per km². The total area is 25.46 km². Ojika island is a part of Saikai National Park.
Ojikajima, Ukujima, Nozakijima