The Izu peninsula (伊豆半島, Izu-hantō) is a large mountainous peninsula with deeply indented coasts to the west of Tokyo on the Pacific coast of the island of Honshū, Japan. Formerly known as Izu Province, Izu peninsula is now a part of Shizuoka Prefecture. The peninsula has an area of 1,421.24 km² and its estimated population in 2005 was 473,942 people. The populated areas primarily lie on the north and east.
Tectonically, the Izu peninsula results from the Philippine Sea Plate colliding with the Okhotsk Plate at the Nankai Trough. The Philippine Sea Plate, the Amurian Plate, and the Okhotsk Plate meet at Mount Fuji, a triple junction. The peninsula itself lies on the Philippine Sea Plate.
The southern portion of the peninsula is composed largely of breccia, and the central and northern portions consist of numerous highly eroded volcanoes. The Amagi Mountain Range dominates the center of the peninsula with Mount Amagi (1406 m) and Mount Atami (773 m) in the east and Mount Daruma (982 m) in the west, with the eastern and western portions of the range extending underwater into Sagami Bay and Suruga Bay. The peninsula's major river, the Kano River in the north, flows through a graben valley created by plate tectonics.
As a result of its underlying geology, the peninsula is prone to frequent earthquake swarms and tsunamis, and it abounds in hot springs.
All of Izu Peninsula is within Shizuoka Prefecture. It is divided administratively into 8 cities and 5 towns:
A popular resort region for tourists from the Kantō region, the Izu peninsula is primarily known for onsen hot spring resorts in Atami, Shuzenji, and Itō. The peninsula abuts Mount Fuji and is a part of Fuji-Hakone-Izu National Park. The area is also popular for sea bathing, surfing, golfing and motorcycle touring.
Aside from tourism, agriculture and fishing are the mainstays of the local economy. Izu is one of the biggest producers of wasabi in Japan, and the local cuisine offers dishes flavored with wasabi. Nevertheless, these industries are not lucrative enough to prevent a heavy loss of population to Greater Tokyo and Shizuoka, particularly among the young.
The northern parts of Izu peninsula is easily accessible from Tokyo and points west via the Tōkaidō Shinkansen, which has stations in both Atami in the northeast and Mishima in the northwest. JR Itō Line and the Izu Kyūkō Line provides service along the east coast of the peninsula to Shimoda, however given the lack of population, these services are less regular.
Central Izu is served by the Sunzu Line as far as Shuzenji. The west coast of the peninsula is less developed, and has no train service.
Izu Peninsula is served by numerous expressways. By car, it is 103.3 km from the Yōga Interchange (用賀インター Yōga Intā) on the Tokyo end of the Tōmei Expressway to Numazu. To get to the eastern side, a branch at Atsugi leads to the Odawara-Atsugi Road, which continues past Odawara to Yugawara, Atami, and Shimoda. Izu Peninsula is also served by Japan National Route 135, Japan National Route 136, and Japan National Route 414. Izu also offers two scenic roads, called "Izu Skyline" (伊豆スカイライン) and "Western Izu Skyline" (西伊豆スカイライン）that offer beautiful views on nature and Mt. Fuji. Both skyline roads are favorite spots of car and motorcycle enthusiasts.
The Odakyu Electric Railway runs local bus services from Odawara and Hakone, and there is an extensive but infrequent internal bus network.
Kanagawa Prefecture is a prefecture located in Kantō region of Japan. The capital of the prefecture is Yokohama. Kanagawa is part of the Greater Tokyo Area. Kanagawa Prefecture is home to Kamakura and Hakone, two popular side trip destinations from Tokyo.
Shizuoka Prefecture is a prefecture of Japan located in the Chūbu region of Honshu. Shizuoka Prefecture has a population of 3,637,998 and has a geographic area of 7,777.42 km². Shizuoka Prefecture borders Kanagawa Prefecture to the east, Yamanashi Prefecture to the northeast, Nagano Prefecture to the north, and Aichi Prefecture to the west.
Itō is a city located on the eastern shore of the Izu Peninsula in Shizuoka Prefecture, Japan. As of 31 July 2019, the city had an estimated population of 68,773 in 36,717 households and a population density of 550 persons per km². The total area was 124.13 square kilometres (47.93 sq mi).
Izu Province was a province of Japan in the area of Shizuoka Prefecture. Izu bordered on Sagami and Suruga Provinces. Its abbreviated form name was Zushū (豆州).
Fuji-Hakone-Izu National Park is a national park in Yamanashi, Shizuoka, and Kanagawa Prefectures, and western Tokyo Metropolis, Japan. It consists of Mount Fuji, Fuji Five Lakes, Hakone, the Izu Peninsula, and the Izu Islands. Fuji-Hakone-Izu National Park covers 1,227 square kilometres (474 sq mi).
Higashiizu is a town located in Kamo District, Shizuoka Prefecture, Japan. As of 30 June 2019, the town had an estimated population of 12,155 in 6264 households, and a population density of 160 persons per km². The total area of the town is 77.83 square kilometres (30.05 sq mi).
Kawazu is a town located on the east coast of Izu Peninsula in Kamo District, Shizuoka Prefecture, Japan. As of 1 August 2019, the town had an estimated population of 7,203 in 3334 households, and a population density of 71 persons per km². The total area of the town is 100.79 square kilometres (38.92 sq mi). The town is noted for its Kawazu sakura, a variety of early-blooming sakura.
Minamiizu is a town located at the southern tip of Izu Peninsula in Kamo District, Shizuoka Prefecture, Japan. As of 1 July 2019, the town had an estimated population of 8,231 in 3895 households, and a population density of 74 persons per km². The total area of the town is 110.58 square kilometres (42.70 sq mi)
Matsuzaki is a town located in on the southwest coast of Izu Peninsula in Kamo District, Shizuoka Prefecture, Japan. As of 31 July 2019, the town had an estimated population of 6,563 in 2969 households, and a population density of 77 persons per km². The total area of the town is 85.23 square kilometres (32.91 sq mi). Sakuramochi is a noted local specialty. Matsuzaki is listed as one of The Most Beautiful Villages in Japan.
Nishiizu is a town located in Kamo District, Shizuoka Prefecture, Japan. As of 1 August 2019, the town had an estimated population of 7,798 in 3764 households, and a population density of 74 persons per km². The total area of the town was 105.52 square kilometres (40.74 sq mi).
Tagata District is a rural district located in Shizuoka Prefecture, Japan. As of July 2012, the district has an estimated population of 38,332 and a population density of 589 persons per km². The total area was 65.13 km². The district is administered out of the city hall of Mishima City.
Izu is a city located in central Izu Peninsula in Shizuoka Prefecture, Japan. As of 1 April 2019, the city had an estimated population of 30,678 in 13,390 households, and a population density of 84 persons per km2. The total area of the city was 363.97 square kilometres (140.53 sq mi).
Izu Ōshima is an inhabited volcanic island in the Izu archipelago in the Philippine Sea, off the coast of Honshu, Japan, 22 km (14 mi) east of the Izu Peninsula and 36 km (22 mi) southwest of Bōsō Peninsula. As with the other islands in the Izu Island group, Izu Ōshima forms part of the Fuji-Hakone-Izu National Park. Izu Ōshima, at 91.06 km² is the largest and closest of Tokyo's outlying islands, which also include the Ogasawara Islands.
Odawara is a city in Kanagawa Prefecture, Japan.
The Itō Line is a railway line owned by the East Japan Railway Company which connects Atami and Itō Stations, along the east coast of Izu Peninsula in Shizuoka Prefecture, Japan. From Itō, the line continues south to Shimoda under the privately owned and operated Izu Kyūkō Line.
The Izu Kyūkō Line is a privately owned railway line of Izukyū Corporation in Shizuoka Prefecture, Japan
The Odoriko (踊り子) is a limited express train service in Japan operated by East Japan Railway Company, Central Japan Railway Company, Izukyu Corporation and Izuhakone Railway, which runs between Tokyo and Izukyū-Shimoda or Shuzenji in Shizuoka Prefecture.
Nakaizu was a town located in Tagata District, Shizuoka Prefecture, Japan, in central Izu Peninsula.
The Izuhakone Railway Sunzu Line is a commuter railway line of the Izuhakone Railway, a private railroad in Japan. The line connects Mishima Station in the city of Mishima with Shuzenji Station in the city of Izu, both within Shizuoka Prefecture. The name "Sunzu" comes from the former provinces of Suruga and Izu, although the line at present operates only within the borders of former Izu Province.
The 1930 North Izu earthquake occurred on November 26 at 04:02 local time. The epicenter was located in the northern Izu Peninsula, Japan. It had a magnitude of Ms 7.3. The earthquake was caused by the movement of the Tanna Fault (丹那断層).
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