Nanpō Islands
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The Nanpō Islands (南方諸島 nanpō shotō?) is a chain of Japanese islands extending from the Izu Peninsula west of Tokyo Bay southward for about 750 miles (1200 km), to within 300 miles (500 km) of the Mariana Islands.
The Nanpō Islands consists of three major groups of islands: the Izu Islands; the Ogasawara Islands, also known as the Bonin Islands; and the Volcano Islands. Among the latter group of islands lies Iōjima or Iwo Jima, located about 670 miles south of Tokyo, 700 miles north of Guam and nearly halfway between Tokyo and Saipan.