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Oki Islands

Coordinates: 36°10′16.1″N 133°8′40.8″E / 36.171139°N 133.144667°E / 36.171139; 133.144667
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Oki
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Geography
Coordinates36°10′16.1″N 133°8′40.8″E / 36.171139°N 133.144667°E / 36.171139; 133.144667
Adjacent toSea of Japan
Administration
Demographics
Population24,500

Oki Islands (隠岐諸島, Oki-shotō, or 隠岐の島 Oki-no-shima, 隠岐群島 Oki-guntō) is an archipelago in the Sea of Japan, the islands of which are administratively part of Oki District, Shimane Prefecture, Japan. The islands have a total area of 346.1 square kilometres (133.6 sq mi). Only four of the sixteen named islands are permanently inhabited. Much of the archipelago is within the borders of Daisen-Oki National Park. Due to their geological heritage, the Oki Islands were designated a UNESCO Global Geopark in September 2014.[1]

Geology

The Oki Islands are volcanic in origin, and are the exposed eroded summits of two massive stratovolcanoes dating approximately 500 million years ago to the Tertiary and Quaternary periods. The oldest rocks in Japan have been found on the Oki Islands.

Dōgo to the east is the largest island in area, and has the highest elevation, Mount Daimanji, at 608 metres (1,995 ft) above sea level. The Dōzen group of islands to the west are all portions of single ancient volcanic caldera which collapsed, leaving three large islands (Nishinoshima, Nakanoshima and Chiburijima) and numerous smaller islands and rocks in a ring formation surrounding a central lagoon.[2] The archipelago is approximately 80 kilometres (43 nmi) north of Honshu coast at its closest point. For administrative purposes, the Japanese government officially considers the disputed islet of Takeshima (Liancourt Rocks) to be a part of the town of Okinoshima on Dōgo.

Climate

Chibu
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
116
 
 
8
2
 
 
96
 
 
7
1
 
 
104
 
 
11
3
 
 
105
 
 
16
7
 
 
131
 
 
20
12
 
 
172
 
 
24
17
 
 
227
 
 
27
21
 
 
124
 
 
29
23
 
 
211
 
 
25
18
 
 
107
 
 
20
12
 
 
122
 
 
15
7
 
 
124
 
 
11
4
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: [3]
Imperial conversion
JFMAMJJASOND
 
 
4.5
 
 
46
35
 
 
3.8
 
 
45
34
 
 
4.1
 
 
51
37
 
 
4.1
 
 
60
45
 
 
5.2
 
 
68
54
 
 
6.8
 
 
74
62
 
 
8.9
 
 
80
71
 
 
4.9
 
 
84
73
 
 
8.3
 
 
77
64
 
 
4.2
 
 
69
53
 
 
4.8
 
 
60
45
 
 
4.9
 
 
51
39
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
  • Summers (June–August) average around 30 degrees Celsius plus humidity. There usually is a strong sea breeze. The sea waves during the summer rarely exceed 2 meters.
  • Autumn (September–November) is temperate. It begins to rain more often and the waves begin to grow. The Rainbow ferry stops operating in November.
  • Winters (December to the end of February) are relatively mild. Temperatures rarely drop below freezing. Also, due to the warming influence of the sea, Oki does not get much snow. What snow there is does not lie for long because the ground is not cold enough. The ferry is more likely to be canceled due to high waves, but it is still possible to leave the island.
  • Spring (March–May) is generally regarded as the best season. There are many opportunities for viewing cherry blossoms on Oki during the spring. The Rainbow ferry starts running in March.

History

The Oki Islands have been inhabited since the Japanese Paleolithic era, and numerous artifacts from the Jomon, Yayoi and Kofun periods have been found by archaeologists, indicating continuous human occupation and activity. The island were organized as Oki Province under the Ritsuryō reforms in the latter half of the seventh century, and the name “Oki-no-kuni” appears on wooden markers found in the imperial capital of Nara. The island of Dōgo is mentioned in the Nara period chronicles Kojiki and Nihon Shoki, and Dōgojima was the location of the capital of ancient Oki Province.[4] During the late Heian period, due to its remoteness, Oki Province came to known as a place for political exile. In 1221, Emperor Go-Toba was sent to Oki, and died in exile on the islands;[5] In 1332, Emperor Go-Daigo was also sent in exile to Oki, but later managed to escape and regain control of the country.[6][7]

From the Kamakura Period Oki Province was governed primarily by the shugo of Izumo Province. In the Muromachi Period, it was ruled successively by the Sasaki clan, the Yamana clan and the Kyōgoku clan. In the Sengoku Period the Amago clan held this province. After the Amago fell and the Tokugawa shogunate was established, Oki Province was declared a tenryō dominion under the direct control of the Shogun. The daimyo of Matsue Domain, belonging to the Matsudaira clan, was appointed as governor.

The entire province had an assessed revenue of only 18,000 koku, although its actual revenues were closer to only 12,000 koku. The province was a frequent port of call for the Kitamaebune coastal trading ships during the Edo period.

Following the Meiji restoration, Oki Province became “Oki Prefecture” from February–June 1869. It was then attached to Tottori Prefecture until 1876, when it was transferred to Shimane Prefecture.[8]

In 1892, Lafcadio Hearn visited the islands, spending a month there, and writing about his experiences in Glimpses of Unfamiliar Japan. Oki was visited by the American naturalist Charles Henry Gilbert in 1906.[9]

Administration

The population is approximately 24,500 inhabitants spread over the four municipalities of:

  • Okinoshima-chō (Okinoshima-town), includes all of Dōgo and the uninhabited islets of Okinashima, Obanashima, Tsunameshima, Shijikijima and Ombeshima, with a total population of approximately 17,000.
  • Chibu-son (Chibu-village), includes all of Chiburijima and the nearby uninhabited islets of Okagashima, Shimazujima, Asashima and Kamishima, with a total population of about 800.
  • Ama-chō (Ama-town), includes all of Nakanoshima and the nearby uninhabited islets of Omorijima and Matsushima, with a total population of about 2,600.
  • Nishinoshima-chō (Nishinoshima-town), includes all of Nishinoshima and nearby uninhabited islets of Hoshikamijima, Futamatajima and Okazuroshima, population about 3,900.[10]

Transportation

Oki Airport (airport code "OKI") lies on the southeastern part of Dōgo[11] and provides air service to Osaka International Airport (Itami, "ITM") and Izumo Airport ("IZO").

The Oki islands can be reached by ferries from harbours like Sakaiminato, Shichirui and Kaga on the mainland.[12] There are also frequent ferries operating between the Dōzen islands throughout the year.[13]

Main islands

Photo Name Kanji Area
[km²]		 Population highest point
[m]		 Peak Coordinates
Dōgo 島後島 241.58 14,849 608 Mount Daimanji 36°14′N 133°17′E / 36.233°N 133.283°E / 36.233; 133.283 (Dōgojima)
Nakanoshima 中之島 32.21 2,400 164 36°5′N 133°06′E / 36.083°N 133.100°E / 36.083; 133.100 (Nakanoshima)
Nishinoshima 西ノ島 55.97 3,400 452 Takuhiyama 36°6′N 133°59′E / 36.100°N 133.983°E / 36.100; 133.983 (Nishinoshima)
Chiburijima 知夫里島 13.7 650 325 36°1′N 133°02′E / 36.017°N 133.033°E / 36.017; 133.033 (Chiburijma)

References

  • National Geospatial Intelligence Agency (NGIA). Prostar Sailing Directions 2005 Japan Enroute. Prostar Publications (2005). ISBN 1577856511
  1. ^ http://www.globalgeopark.org/aboutGGN/list/Japan/8438.htm
  2. ^ ふるさと隠岐 (in Japanese). March 2007. {{cite book}}: Unknown parameter |editors= ignored (|editor= suggested) (help)
  3. ^ JMA Ama Station
  4. ^ http://www.town.nishinoshima.shimane.jp/english/about.nishinoshima.htm
  5. ^ Mason, R.H.P. and J.G. Caiger. (1972). A History of Japan, p. 105.
  6. ^ Titsingh, Isaac. (1834). Annales des empereurs du japon, p. 287.
  7. ^ Sansom, George (1961). A History of Japan, 1334-1615. Stanford University Press. p. 10. ISBN 0804705259.
  8. ^ Shimane Prefecture - History
  9. ^ HighBeam Research - Charles Henry Gilbert (1859-1928), naturalist-in-charge: the 1906 North Pacific expedition of the Steamer Albatross
  10. ^ 3
  11. ^ 5
  12. ^ 6
  13. ^ http://www.nkk-oki.com/2014ferrydozenisokazetimetable201411.pdf
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