Japanese Ogasawara-gunto
Island group, western Pacific Ocean.
Located about 600 mi (950 km) south of Tokyo and consisting of 27 volcanic islands with a total area of about 40 sq mi (104 sq km), the group includes Chichi (the largest), Haha, Muko, and Yome islands. They were colonized in 1830 by a group of Europeans and Hawaiians. The islands were formally annexed by Japan in 1876; they were administered by the U.S. in 1945–68.