Iinan, Shimane

Iinan (飯南町, Iinan-chō) is a town located in Iishi District, Shimane Prefecture, Japan.

Iinan
飯南町
Town
Iinan town hall
Iinan town hall
Flag of Iinan
Flag
Location of Iinan in Shimane Prefecture
Location of Iinan in Shimane Prefecture
Iinan is located in Japan
Iinan
Iinan
Location in Japan
Coordinates: 35°0′N 132°43′E
CountryJapan
RegionChūgoku
San'in
PrefectureShimane Prefecture
DistrictIishi
Area
 • Total242.84 km2 (93.76 sq mi)
Population
 (March 1, 2017)
 • Total4,908
 • Density20/km2 (52/sq mi)
Time zoneUTC+09:00 (JST)
City hall address890 Shimoakana, Iinan-machi
690-3513
ClimateCfa
Websitewww.iinan.jp
Symbols
FlowerPeony
TreeBeech

It was formed on January 1, 2005 from the merger of the towns of Tonbara and Akagi, both from Iishi District.

As of March 1, 2017 the town has a population of 4,908 and a density of 20 persons per km². The area is 242.84 km².

Geography

Located on the border of Shimane Prefecture and Hiroshima Prefecture, the Gōno River　flows to its west. The town is part of the Hiba-Dōgo-Taishaku Quasi-National Park.[1]

Mountains: Mt. Oyorogi, Mt. Kotobiki, Mt. Mengame

Rivers: Kando River, Tonbara River, Akana River, Ono River (Tributary of Kando River)

Lakes: Lake Kijima (Kijima Dam lake)

Subdivisions

Surrounding municipalities

Climate

Iinan has a humid subtropical climate (Köppen climate classification Cfa) with very warm summers and cool winters. Precipitation is abundant throughout the year. The average annual temperature in Iinan is 11.7 °C (53.1 °F). The average annual rainfall is 2,044.9 mm (80.51 in) with July as the wettest month. The temperatures are highest on average in August, at around 23.8 °C (74.8 °F), and lowest in January, at around 0.3 °C (32.5 °F).[2] The highest temperature ever recorded in Iinan was 35.1 °C (95.2 °F) on 16 July 2018; the coldest temperature ever recorded was −14.0 °C (6.8 °F) on 28 February 1981.[3]

Climate data for Akana, Iinan (1991−2020 normals, extremes 1978−present)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 14.3
(57.7)		 18.6
(65.5)		 21.5
(70.7)		 28.9
(84.0)		 30.6
(87.1)		 32.2
(90.0)		 35.1
(95.2)		 35.0
(95.0)		 33.2
(91.8)		 28.3
(82.9)		 22.8
(73.0)		 17.3
(63.1)		 35.1
(95.2)
Average high °C (°F) 3.8
(38.8)		 5.1
(41.2)		 10.0
(50.0)		 16.6
(61.9)		 21.7
(71.1)		 24.6
(76.3)		 27.8
(82.0)		 29.2
(84.6)		 24.8
(76.6)		 19.1
(66.4)		 13.0
(55.4)		 6.6
(43.9)		 16.9
(62.4)
Daily mean °C (°F) 0.3
(32.5)		 0.9
(33.6)		 4.4
(39.9)		 10.2
(50.4)		 15.4
(59.7)		 19.3
(66.7)		 23.0
(73.4)		 23.8
(74.8)		 19.4
(66.9)		 13.3
(55.9)		 7.8
(46.0)		 2.6
(36.7)		 11.7
(53.0)
Average low °C (°F) −3.2
(26.2)		 −3.3
(26.1)		 −0.8
(30.6)		 3.9
(39.0)		 9.4
(48.9)		 14.7
(58.5)		 19.4
(66.9)		 19.8
(67.6)		 15.1
(59.2)		 8.3
(46.9)		 3.0
(37.4)		 −1.1
(30.0)		 7.1
(44.8)
Record low °C (°F) −11.8
(10.8)		 −14.0
(6.8)		 −11.0
(12.2)		 −5.7
(21.7)		 −1.6
(29.1)		 5.3
(41.5)		 6.7
(44.1)		 10.9
(51.6)		 2.3
(36.1)		 −1.5
(29.3)		 −4.2
(24.4)		 −11.0
(12.2)		 −14.0
(6.8)
Average precipitation mm (inches) 172.5
(6.79)		 144.4
(5.69)		 152.6
(6.01)		 136.5
(5.37)		 155.8
(6.13)		 214.5
(8.44)		 297.1
(11.70)		 172.1
(6.78)		 205.3
(8.08)		 111.9
(4.41)		 106.8
(4.20)		 175.4
(6.91)		 2,044.9
(80.51)
Average snowfall cm (inches) 179
(70)		 139
(55)		 47
(19)		 1
(0.4)		 0
(0)		 0
(0)		 0
(0)		 0
(0)		 0
(0)		 0
(0)		 3
(1.2)		 87
(34)		 457
(180)
Average precipitation days (≥ 1.0 mm) 18.9 15.9 15.0 11.5 10.3 12.7 13.5 10.9 11.3 9.6 11.9 17.7 159.2
Average snowy days (≥ 3 cm) 16.8 13.9 5.5 0.1 0 0 0 0 0 0 0.3 7.3 43.9
Mean monthly sunshine hours 57.7 74.9 133.7 179.5 203.4 145.4 147.8 178.9 134.9 148.9 109.3 67.9 1,576
Source: Japan Meteorological Agency[3][2]

Demographics

Per Japanese census data,[4][5] the population of Iinan has decreased by more than half over the past 50 years.

Historical population
YearPop.±%
1970 9,163—    
1975 8,180−10.7%
1985 7,771−5.0%
1985 7,650−1.6%
1990 7,331−4.2%
1995 6,893−6.0%
2000 6,541−5.1%
2005 5,979−8.6%
2010 5,534−7.4%
2015 5,031−9.1%
2020 4,577−9.0%
(Population of Tonbara and Akagi added together before 2005)

Transportation

National Highways
  • National Highway 54
  • National Highway 184

Roadside Stations
  • Roadside Station Akagi Plateau
  • Roadside Station Tonbara

There is no railroad access to Iinan.

Notable places
AkanaSetoyamaCastle Distant view
  • Akana Castle
    It is an old castle located on top of a hill in the Akana area of the town.
  • Mount Mengame
    Situated on the border of Hiroshima Prefecture and Shimane Prefecture, Mount Mengame has an elevation of 830.3m. It is known for being the only place in the Chūgoku Region in which Luehdorfia are found.[6]
  • Mount Kotobiki
    Mount Kotobiki has an elevation of 1014m. Near the summit of the mountain is a small shrine and a forest of beech trees. The name "Kotobiki" comes from the traditional Japanese musical instrument, the koto.[7]
  • Akana Marshland
    The Akana Marshland is located in the Fukuda Area of the town, and is centered in Lake Nagao. It is known for having the largest forest of alders in the prefecture.[8]
  • Kotobiki Camp Area
    The Kotobiki Camp Area is located at the foot of Mount Kotobiki. It is open from late April to late October.[9]

References
  1. 考える社会科地図 Kangaeru Shakaika Chizu. 四谷大塚出版 Yotsuya-Ōtsuka Shuppan. 2005. p. 25.
  2. 気象庁 / 平年値（年・月ごとの値）. JMA. Retrieved April 24, 2022.
  3. 観測史上1～10位の値（年間を通じての値）. JMA. Retrieved April 24, 2022.
  4. ja:飯南町
  5. https://www.citypopulation.de/en/japan/shimane/ Iinan population statistics
  6. (in Japanese) おかえりなさい！：島根県飯南町観光ＷＥＢ Archived 2012-08-02 at archive.today
  7. (in Japanese) おかえりなさい！：島根県飯南町観光ＷＥＢ Archived 2007-12-09 at the Wayback Machine
  8. (in Japanese) おかえりなさい！：島根県飯南町観光ＷＥＢ Archived 2007-12-09 at the Wayback Machine
  9. (in Japanese) おかえりなさい！：島根県飯南町観光ＷＥＢ Archived 2007-10-12 at the Wayback Machine


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