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Okayama Prefecture

Coordinates: 34°39′42″N 133°56′5″E / 34.66167°N 133.93472°E / 34.66167; 133.93472
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Okayama Prefecture
Japanese transcription(s)
 • Japanese岡山県
 • RōmajiOkayama-ken
A street in Okayama City, Okayama Prefecture at night
A street in Okayama City, Okayama Prefecture at night
Flag of Okayama Prefecture
Official logo of Okayama Prefecture
Anthem: Okayama-ken no uta
Location of Okayama Prefecture
Coordinates: 34°39′42″N 133°56′5″E / 34.66167°N 133.93472°E / 34.66167; 133.93472
Country Japan
RegionChūgoku (Sanyō)
SubdivisionsDistricts: 10, Municipalities: 27
 • GovernorRyūta Ibaragi
 • Total7,114.50 km2 (2,746.92 sq mi)
 • Rank17th
 (1 February 2018)
 • Total1,906,464
 • Rank21st
 • Density270/km2 (690/sq mi)
 • TotalJP¥ 7,842 billion
US$ 71.9 billion (2019)
ISO 3166 codeJP-33
Symbols of Japan
BirdLesser cuckoo (Cuculus poliocephalus)
FlowerPeach blossom (Prunus persica var. vulgaris)
TreeRed pine (Pinus densiflora)

Okayama Prefecture (岡山県, Okayama-ken) is a prefecture of Japan located in the Chūgoku region of Honshu.[2] Okayama Prefecture has a population of 1,906,464 (1 February 2018) and has a geographic area of 7,114 km2 (2,746 sq mi). Okayama Prefecture borders Tottori Prefecture to the north, Hyōgo Prefecture to the east, and Hiroshima Prefecture to the west.

Okayama is the capital and largest city of Okayama Prefecture, with other major cities including Kurashiki, Tsuyama, and Sōja.[3][4][5] Okayama Prefecture's south is located on the Seto Inland Sea coast across from Kagawa Prefecture on the island of Shikoku, which are connected by the Great Seto Bridge, while the north is characterized by the Chūgoku Mountains.


Prior to the Meiji Restoration of 1868, the area of present-day Okayama Prefecture was divided between Bitchū, Bizen and Mimasaka Provinces. Okayama Prefecture was formed and named in 1871 as part of the large-scale administrative reforms of the early Meiji period (1868–1912), and the borders of the prefecture were set in 1876.[4][6]


Map of Okayama Prefecture
     Government Ordinance Designated City      City      Town      Village

Okayama Prefecture borders Hyōgo Prefecture, Tottori Prefecture, and Hiroshima Prefecture.[4] It faces Kagawa Prefecture in Shikoku across the Seto Inland Sea and includes 90 islands in the sea.

Okayama Prefecture is home to the historic town of Kurashiki. Most of the population is concentrated around Kurashiki and Okayama. The small villages in the northern mountain region are aging and declining in population - more than half of the prefecture's municipalities are officially designated as depopulated.[7]

As of 1 April 2014, 11% of the total land area of the prefecture was designated as Natural Parks, namely the Daisen-Oki and Setonaikai National Parks; the Hyōnosen-Ushiroyama-Nagisan Quasi-National Park; and seven Prefectural Natural Parks.[8]


Okayama City

Fifteen cities are located in Okayama Prefecture:

Name Area (km2) Population Map
Rōmaji Kanji
Akaiwa 赤磐市 209.43 44,498
Asakuchi 浅口市 66.46 35,022
Bizen 備前市 258.23 35,610
Ibara 井原市 243.36 41,460
Kasaoka 笠岡市 136.03 50,160
Kurashiki 倉敷市 355.63 483,576
Maniwa 真庭市 828.43 44,265
Mimasaka 美作市 429.19 28,502
Niimi 新見市 793.27 30,583
Okayama (capital) 岡山市 789.92 720,841
Setouchi 瀬戸内市 125.51 37,934
Sōja 総社市 212 67,059
Takahashi 高梁市 547.01 31,556
Tamano 玉野市 103.61 60,101
Tsuyama 津山市 506.36 102,294

Towns and villages[edit]

These are the towns and villages in each district:

Name Area (km2) Population District Type Map
Rōmaji Kanji
Hayashima 早島町 7.62 12,671 Tsukubo District Town
Kagamino 鏡野町 419.69 14,651 Tomata District Town
Kibichūō 吉備中央町 268.73 11,989 Kaga District Town
Kumenan 久米南町 78.65 4,962 Kume District Town
Misaki 美咲町 232.15 17,776 Kume District Town
Nagi 奈義町 69.54 5,861 Katsuta District Town
Nishiawakura 西粟倉村 57.93 1,437 Aida District Village
Satoshō 里庄町 12.23 11,204 Asakuchi District Town
Shinjō 新庄村 67.1 951 Maniwa District Village
Shōō 勝央町 54.09 11,237 Katsuta District Town
Wake 和気町 144.21 14,191 Wake District Town
Yakage 矢掛町 90.62 14,041 Oda District Town



Okayama prefecture population pyramid in 2020

Per Japanese census data,[9] and,[10] Okayama prefecture has had continual negative population growth since 2005

Historical population
1920 1,218,000—    
1930 1,284,000+5.4%
1940 1,329,000+3.5%
1950 1,661,000+25.0%
1960 1,670,000+0.5%
1970 1,707,000+2.2%
1980 1,871,000+9.6%
1990 1,926,000+2.9%
2000 1,950,828+1.3%
2010 1,945,276−0.3%
2020 1,920,739−1.3%



High schools[edit]

  • Okayama
    • Okayama Ichinomiya Senior High School
    • Okayama Asahi Senior High School
    • Okayama Sozan Senior High School
    • Okayama Hosen Senior High School
    • Okayama Joto Senior High School
    • Okayama Sakuyo High School[11]
    • Kurashiki High School


JR Okayama Station
Okayama Momotarō Airport





National highways[edit]



  • Bizen-yaki (Bizen pottery)
  • Bizen Osafune/Bitchu Aoe swords

Association with Momotarō legend[edit]

Okayama Prefecture is closely associated with the folklore hero, Momotarō. This tale is said to have roots in the legendary story of Kibitsuhiko-no-mikoto and Ura which explains that the Prince Ura of Kudara used to live in Kinojo (castle of the devil) and was a cause of trouble for the people living in the village. The emperor's government sent Kibitsuhiko-no-mikoto (Momotarō) to defeat Ura. The city of Okayama holds an annual Momotarō-matsuri, or Momotarō Festival.[5][12]



City Light Stadium.

The sports teams listed below are based in Okayama.





Okayama Korakuen Park and Okayama Castle
Hiruzen Plateau and Hiruzen Joyful Park in Maniwa
Hinase Island and Seto Inlandsea in Bizen
Bitchu Matsuyama Castle in Takahashi

Some tourist attractions are:

Notable people[edit]


  1. ^ "2020年度国民経済計算(2015年基準・2008SNA) : 経済社会総合研究所 - 内閣府". 内閣府ホームページ (in Japanese). Archived from the original on 24 September 2023. Retrieved 18 May 2023.
  2. ^ Nussbaum, Louis-Frédéric. (2005). "Okayama-ken" in Japan Encyclopedia, p. 745, p. 745, at Google Books; "Chūgoku" at p. 127, p. 127, at Google Books.
  3. ^ Nussbaum, "Okayama" at p. 745, p. 745, at Google Books.
  4. ^ a b c "Okayama Prefecture". Encyclopedia of Japan. Tokyo: Shogakukan. 2012. OCLC 56431036. Archived from the original on 25 August 2007. Retrieved 1 August 2012.
  5. ^ a b "岡山(県)" [Okayama Prefecture]. Nihon Daihyakka Zensho (Nipponika) (in Japanese). Tokyo: Shogakukan. 2012. OCLC 153301537. Archived from the original on 25 August 2007. Retrieved 15 August 2012.
  6. ^ Nussbaum, "Provinces and prefectures" at p. 780, p. 780, at Google Books.
  7. ^ Okayama official website Archived 2 January 2013 at the Wayback Machine accessed November 2007
  8. ^ "General overview of area figures for Natural Parks by prefecture" (PDF). Ministry of the Environment. 1 April 2014. Archived (PDF) from the original on 21 April 2012. Retrieved 19 February 2015.
  9. ^ "Okayama (Japan): Prefecture, Major Cities & Towns - Population Statistics, Maps, Charts, Weather and Web Information". www.citypopulation.de. Archived from the original on 2022-05-12. Retrieved 2022-05-12.
  10. ^ "Japan Prefectures Population from 1920 and Area". www.demographia.com. Archived from the original on 2017-04-29. Retrieved 2020-11-25.
  11. ^ "岡山県作陽高等学校". www.sakuyo-h.ed.jp. Archived from the original on 11 January 2018. Retrieved 24 April 2018.
  12. ^ "Okayama History". Archived from the original on 22 May 2012. Retrieved 24 June 2012.
  13. ^ "Yuko Arimori's profile". Archived from the original on 2015-06-17. Retrieved 2013-05-31.
  14. ^ "ENHYPEN's profile". Archived from the original on 2022-08-10. Retrieved 2024-01-28.


External links[edit]