This article is about the island in the Seto Inland Sea. For the island in the Sea of Japan, see
Ōmijima. For the municipality in Ehime Prefecture, see
Ōmishima, Ehime.
Ōmishima Island (大三島, Ōmishima) is the largest island in the Geiyo Islands chain, and the westernmost island on which the Nishiseto Expressway, which links Honshu and Shikoku via a number of islands, runs. It is located in the Seto Inland Sea. The island's highest peak is Washigatozan (鷲ヶ頭山) at an altitude of 437 m (1,434 ft).
Population
The population as of the 2020 census was 4,963 - 2,299 men, and 2,264 women.[1]
Geography
Ōmishima is kidney-shaped and together with Ōsakikamijima on the west encloses the calm bay of Utena, where the primary seaport of Miyaura [ja] is located. The island's Utena Dam reservoir is the primary freshwater source for Ōmishima itself and the nearby Hakata.
History
Climate
| Climate data for Ōmishima (1991−2020 normals, extremes 1978−present)
|
| Month
|
Jan
|
Feb
|
Mar
|
Apr
|
May
|
Jun
|
Jul
|
Aug
|
Sep
|
Oct
|
Nov
|
Dec
|
Year
|
| Record high °C (°F)
|
16.0
(60.8)
|
20.2
(68.4)
|
25.4
(77.7)
|
27.9
(82.2)
|
30.4
(86.7)
|
33.7
(92.7)
|
38.0
(100.4)
|
37.4
(99.3)
|
36.1
(97.0)
|
31.9
(89.4)
|
24.1
(75.4)
|
20.4
(68.7)
|
38.0
(100.4)
|
| Mean daily maximum °C (°F)
|
9.6
(49.3)
|
10.2
(50.4)
|
13.4
(56.1)
|
18.6
(65.5)
|
23.2
(73.8)
|
26.1
(79.0)
|
30.0
(86.0)
|
32.0
(89.6)
|
28.3
(82.9)
|
22.8
(73.0)
|
17.2
(63.0)
|
12.0
(53.6)
|
20.3
(68.5)
|
| Daily mean °C (°F)
|
5.5
(41.9)
|
5.6
(42.1)
|
8.4
(47.1)
|
13.1
(55.6)
|
17.6
(63.7)
|
21.3
(70.3)
|
25.3
(77.5)
|
26.8
(80.2)
|
23.4
(74.1)
|
18.0
(64.4)
|
12.5
(54.5)
|
7.7
(45.9)
|
15.4
(59.8)
|
| Mean daily minimum °C (°F)
|
1.3
(34.3)
|
1.1
(34.0)
|
3.4
(38.1)
|
8.0
(46.4)
|
12.7
(54.9)
|
17.6
(63.7)
|
22.0
(71.6)
|
23.2
(73.8)
|
19.7
(67.5)
|
13.8
(56.8)
|
8.2
(46.8)
|
3.4
(38.1)
|
11.2
(52.2)
|
| Record low °C (°F)
|
−5.9
(21.4)
|
−6.2
(20.8)
|
−4.4
(24.1)
|
−1.5
(29.3)
|
3.6
(38.5)
|
9.6
(49.3)
|
15.5
(59.9)
|
15.6
(60.1)
|
11.1
(52.0)
|
5.5
(41.9)
|
−1.3
(29.7)
|
−3.5
(25.7)
|
−6.2
(20.8)
|
| Average precipitation mm (inches)
|
40.8
(1.61)
|
54.0
(2.13)
|
89.5
(3.52)
|
98.0
(3.86)
|
116.2
(4.57)
|
186.3
(7.33)
|
194.6
(7.66)
|
93.5
(3.68)
|
133.4
(5.25)
|
96.3
(3.79)
|
66.0
(2.60)
|
50.1
(1.97)
|
1,218.6
(47.98)
|
| Average precipitation days (≥ 1.0 mm)
|
5.3
|
6.7
|
9.0
|
8.9
|
8.7
|
11.1
|
9.4
|
6.7
|
8.8
|
7.3
|
6.4
|
6.0
|
94.3
|
| Mean monthly sunshine hours
|
146.1
|
151.2
|
182.0
|
200.2
|
214.7
|
157.1
|
201.2
|
233.9
|
171.2
|
180.4
|
159.2
|
144.3
|
2,141.6
|
| Source: JMA[4][5]
|
Transportation
Ōmishima is connected to the mainland of Honshu and Shikoku islands by the bridges of the Nishiseto Expressway (Shimanami Kaidō). A ferry is also available from the island to Ōsakikamijima, Okamura Island and Ōkunoshima (Rabbit Island). Ōmishima Island is served by the national Route 317.
Attractions
Notable residents
External links
References
- This article incorporates material from Japanese Wikipedia pages 大三島 and 大三島町, accessed 13 September 2017
Wikimedia Commons has media related to
Ōmishima.
