Izu Islands#2012 earthquake

File:Location IzuIlands.jpg

{{multiple image

| align = right

| image1 = Hachijojima tamaishigaki 2007-03-20.jpg

| width1 = 140

| alt1 =

| caption1 =

| image2 = Niijima Habushi Beach.JPG

| width2 = 140

| alt2 =

| caption2 =

| footer = Left: Walls built by exiles on Hachijojima
Right: A beach on Niijima

}}

File:ShikineFromKozuTyoJpDec04-1.jpg

The Izu islands stretch south-east from the Izu Peninsula on Honshu and cover an area of approximately {{Convert|301.56|km2|2|abbr=on}}. There are nine populated islands with a total population of 24,645 people ({{As of|2009|lc=y}}) spread over {{Convert|296.56|km2|2|abbr=on}}. The largest of them is Izu Oshima (8,346 inhabitants, {{Convert|91.06|km2|2|abbr=on}}), the smallest Toshima (292 inhabitants, {{Convert|4.12|km2|abbr=on}}.){{cn|date=October 2022}} Of the inhabited islands, seven are traditionally referred to as the "Izu Seven": Oshima, Toshima, Niijima, Kozushima, Miyakejima, Hachijojima, and Mikurajima, though Shikinejima and Aogashima are sometimes included as well.{{cn|date=October 2022}}

During the Edo period, Nii-jima, Miyake-jima, and Hachijō-jima served as places of exile for criminals.

The subtropical Ogasawara Islands, which are also administratively part of Tokyo, lie further to the south. They form a far-flung archipelago of over thirty (30) islands some {{convert|1,000|km|0|abbr=on}} due south of Tokyo.

{{notelist}}

The Izu Islands are divided into two towns (Oshima and Hachijojima) and six villages (the remaining inhabited islands.) Three subprefectures are formed above the municipalities as branch offices of the metropolitan government.{{cn|date=October 2022}}

All the islands (more than a dozen in total) lie within the Fuji-Hakone-Izu National Park.{{cn|date=October 2022}} The four southernmost islands are not administered under any town or village in Hachijō Subprefecture, but are unincorporated areas. Torishima is now uninhabited but is an important bird refuge.

Deserted islands between Aogashima and Ogasawara Islands, namely Bayonaise Rocks (Beyonēzu Retsugan), Smith Island (Sumisu-tō), Torishima, and Lot's Wife (Sōfu-iwa) do not belong to any municipality, because both Hachijō Town and Aogashima Village claim administrative rights. They are directly controlled by Hachijō Subprefecture instead.

• Ōshima Subprefecture
• File:Flag of Oshima, Tokyo.svg Ōshima Town: Izu Ōshima
• Toshima Village: Toshima
• Niijima Village: Niijima, Shikinejima, and Udoneshima
• Kōzushima Village: Kōzushima
• Miyake Subprefecture
• Miyake Village: Miyakejima and Ōnoharajima
• Mikurajima Village: Mikurajima, Inambajima
• Hachijō Subprefecture
• File:Flag of Hachijo, Tokyo.svg Hachijō Town: Hachijōjima and Hachijōkojima
• File:Flag of Aogashima, Tokyo.svg Aogashima Village: Aogashima
• unincorporated: Bayonnaise Rocks (Beyonēzu Retsugan), Sumisu-tō, Torishima, and Sōfu-iwa

Though the population on the Izu Islands has been dropping, the pace is less dramatic than on other isolated Japanese islands.{{cn|date=October 2022}}

The divergent Hachijō language is spoken on the islands.

File:Oshima airport aerial-photo.jpg.]]

The primary industries are fisheries, agriculture, and tourism. The most scenic spots on the islands are crowded with tourists during summers. Popular tourist activities include swimming, scuba diving, surfing, fishing, bird watching and trekking.{{cn|date=October 2022}}

Transportation between the islands, by cargo-passengers boats, jetfoils, and aircraft, is supported by harbours on all inhabited islands and five airports (small islands can be reached by helicopter).{{cn|date=October 2022}}

There are 5 airports, 15 harbors, and 19 fishing ports. Flights from Tokyo take 30 minutes, while boats take 7–10 hours and jetfoils make the route in about two hours. Transportation on the islands is considered important to the quality of life, which is why about {{Convert|215|km|abbr=on}} of paved main roads have been constructed to serve various kinds of vehicles.{{cn|date=October 2022}}

There was no electricity on the islands before 1953, but by 1962 98% of the area was receiving electricity.{{cn|date=October 2022}}

The islands occupy the northern portion of the Izu–Bonin–Mariana Arc which extends to the Izu Peninsula and Mount Fuji on the Honshū mainland which are northern extensions of the Izu volcanic arc. The Izu arc ends there at a tectonic triple junction.

Volcanic activity is frequent in the area.[http://www.volcano.si.edu/world/region.cfm?rnum=0804 Volcanoes of the Izu, Volcano and Mariana Islands] www.volcano.si.edu 31 people were killed when the research vessel Kaiyō Maru no 5 was destroyed during the 1953 eruption of Myōjin-shō. Volcanic activity, including the release of harmful gases, forced the evacuation of Miyake-jima in 2000. Residents were allowed to return permanently to the island in February 2005 but were required to carry gas masks in case of future volcanic emissions.{{cn|date=October 2022}}

To handle the various types of natural disasters threatening the region, including tsunamis, storm, floods, and volcanism, Tokyo metropolitan government has developed prevention and safety measures, including hazard maps and evacuation guidance, radios, signs, and a transport system for emergency supplies.{{cn|date=October 2022}}

A chain of volcanic islands, the Izu Archipelago are oceanic islands that formed relatively recently (within a few million years) without any previous connection to mainland Japan. In contrast to isolated Pacific islands, such as Hawaii and the Galápagos, the Izu Islands are located near the mainland and have thus been frequently colonized by various species by overseas dispersal from the mainland or from adjacent islands. This make them interesting for the studies of ecological and evolutionary processes.{{Cite journal| last1 = Kuriyama | first1 = Takeo| last2 = Brandley | first2 = Matthew C.| last3 = Katayama | first3 = Akira| last4 = Mori | first4 = Akira|author5=Honda, Masanao |author6=Hasegawa, Masami| title = A time-calibrated phylogenetic approach to assessing the phylogeography, colonization history and phenotypic evolution of snakes in the Japanese Izu Islands| journal = J. Biogeogr. | year = 2011 | volume = 38 | issue = 2| pages = 259–271| url = http://mattbrandley.com/pubs/Kuriyama_et_al_2011_JBio.pdf| doi = 10.1111/j.1365-2699.2010.02403.x| bibcode = 2011JBiog..38..259K| s2cid = 55266255}}

Campanula (Bellflower) colonized the entire archipelago in a single event. Similarly, the Euhadra snails, endemic to Japan, populated the islands in a single event and all individuals on inhabited islands possess an identical haplotype. The Apodemus mice, on the other hand, colonized the islands from the mainland in two independent events.

• 680 - Izu Province was established in the form of being separated from Suruga Province. At that time, the Izu islands belonged to Kamo-gun.『日本歴史地名大系 22 静岡県の地名』平凡社、2000年。ISBN 4582490220。「伊豆国」の項目（P75.）。
• 12th century and possibly earlier – used as Japanese convict settlements.{{Cite EB1911|wstitle=Izu-no-Shichi-Tō|volume=15|page=102}}
• 1643 - Explorer Maarten Gerritsz Vries called it the De Vries ArchipelagoAfter Dutch explorer Maarten Gerritsz Vries, the first European to describe them in 1643. See "Izu Shotō" in Louis Frédéric, Japan Encyclopedia (Belknap, 2002), p. 412.
• November 14, 1871 (December 25, 1871) --- Due to the first prefectural integration, they came under the jurisdiction of the Ashigara Prefecture.[{{NDLDC|787951/232}} 明治4年太政官布告第594号] - 国立国会図書館近代デジタルライブラリー Meiji 4th Year Dajokan Proclamation No. 594 - National Diet(tr. ?) Library Modern Digital Library
• 1876 (Meiji 9), April 18 - Due to the second prefectural integration, they came under the jurisdiction of Shizuoka Prefecture.[{{NDLDC|787956/73}} 明治9年太政官布告第53号] - 国立国会図書館近代デジタルライブラリー (Meiji 9, Dajokan Proclamation No. 53] - National Diet(tr. ?) Library Modern Digital Library)
• 1878 (Meiji 11), January 11 - they came under the jurisdiction of Tokyo Prefecture[{{NDLDC|787958/33}} 明治11年太政官布告第1号] - 国立国会図書館近代デジタルライブラリー (Meiji Year 11 Dajokan Proclamation No. 1] - National Diet(tr. ?) Library Modern Digital Library)

{{EB1911 poster|Izu-no-Shichi-Tō}}

{{Commons category}}

{{Portal|Tokyo|Islands}}

• List of islands of Japan

{{Reflist|30em}}

• Teikoku's Complete Atlas of Japan, Teikoku-Shoin Co., Ltd. Tokyo 1990, {{ISBN|4-8071-0004-1}}
• {{Cite web |title=Tokyo Islands: The 9 exotic islands of Tokyo, Izu Islands |url=http://tokyoislands.jp/ |access-date=2022-03-20 |website=Tokyo Islands |language=en-US}} The official islands information page.

{{Tokyo}}

{{Coord|34|44|N|139|24|E |region:JP-13_type:isle_source:dewiki |display=title}}

{{Authority control}}

*

Category:Tourist attractions in Tokyo

Category:Archipelagoes of Japan

Category:Islands of Tokyo

Category:Archipelagoes of the Pacific Ocean