- a group of islands in the N Pacific, SE of and belonging to Japan: under U.S. administration 1945–68. 40 sq. mi. (104 sq. km).
- a group of 27 volcanic islands in the W Pacific: occupied by the US after World War II; returned to Japan in 1968. Largest island: Chichijima. Area: 103 sq km (40 sq miles)Japanese name: Ogasawara Gunto