The Izu-Ogasawara or Izu-Bonin Islands, which include the Iwo Islands, extend southward from Honshu (24–35°N, 139–143°E) for nearly 1500 km in the northwest Pacific. The climate is mild to subtropical. At 27°N, 142°E, the annual average temperature is 22°C; January, 17°C; July, 27°C; with 1600 mm mean precipitation. The islands are mostly well forested with valuable timber, but some of the northern islands have been so exploited that today they are mainly grass covered.
The Izu Islands, the northern group, are also called the Shichito Islands. They have long been a part of the same province as the Izu Peninsula of Honshu. The Ogasawara Islands, the middle group, were first discovered by a Samurai voyager, S. Ogasawara, in 1593, after whom the islands were named. They had been uninhabited until the beginning of the last century and called Munin, meaning “uninhabited” in Japanese, which became altered to “Bonin.” The term Bonin Islandsis thus a synonym of the Ogasawara Islands and...
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Sugimura, A. (1975). Izu-ogasawara-IWO islands (nampo-shoto). In: World Regional Geology. Encyclopedia of Earth Science. Kluwer Academic Publishers. https://doi.org/10.1007/3-540-31081-1_63
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DOI: https://doi.org/10.1007/3-540-31081-1_63
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