<P> Japanese naval officers who arrived to fortify the island before the U.S. invasion mistakenly called it Iwo Jima . In this way, the "Iwo Jima" reading became mainstream and was the one used by U.S. forces who arrived during World War II . Former island residents protested against this rendering, and the Ministry of Land, Infrastructure, Transport and Tourism's Geographical Survey Institute debated the issue and formally announced on June 18, 2007, that the official Japanese pronunciation of the island's name would revert to the pre-war Iō - tō . Moves to revert the pronunciation were sparked by the high - profile films Flags of Our Fathers and Letters from Iwo Jima . The change does not affect how the name is written with kanji, "硫黄 島", only how it is pronounced or written in hiragana, katakana and rōmaji . </P> <P> The island has an approximate area of 21 km (8 sq mi). The most prominent feature is Mount Suribachi on the southern tip, a vent that is thought to be dormant and is 161 m (528 ft) high . Named after a Japanese grinding bowl, the summit of Mount Suribachi is the highest point on the island . Iwo Jima is unusually flat and featureless for a volcanic island . Suribachi is the only obvious volcanic feature, as it is only the resurgent dome (raised centre) of a larger submerged volcanic caldera . </P> <P> 80 km (43 nautical miles, 50 mi) north of the island is North Iwo Jima (北 硫黄 島, Kita - Iō - tō, literally: "North Sulfur Island") and 59 kilometres (37 mi; 32 nmi) south is South Iwo Jima (南 硫黄 島, Minami - Iō - tō, "South Sulfur Island"); these three islands make up the Volcano Islands group of the Ogasawara Islands . Just south of Minami - Iō - jima are the Mariana Islands . </P> <P> Iwo Jima has a history of minor volcanic activity a few times per year (fumaroles, and their resultant discolored patches of seawater nearby), but so far no sign of a big eruption coming . </P>

Where is iwo jima in relation to japan
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