Flag of Akaiwa
Official seal of Akaiwa
Location of Akaiwa in Okayama Prefecture
Location of Akaiwa in Okayama Prefecture
Akaiwa is located in Japan
Location in Japan
Coordinates: 34°45′N 134°1′E / 34.750°N 134.017°E / 34.750; 134.017Coordinates: 34°45′N 134°1′E / 34.750°N 134.017°E / 34.750; 134.017
RegionChūgoku (San'yō)
PrefectureOkayama Prefecture
 • MayorToshio Inoue (since April 2009)
 • Total209.43 km2 (80.86 sq mi)
 (April 1, 2017)
 • Total44,498
 • Density210/km2 (550/sq mi)
Time zoneUTC+09:00 (JST)
City hall address344 Shimoichi, Akaiwa-shi, Okayama-ken
FlowerPeachCherry blossom

Akaiwa (赤磐市, Akaiwa-shi) is a city located in Okayama Prefecture, Japan. As of April 1, 2017, the city has an estimated population of 44,498, with 18,119 households and a population density of 210 persons per km².[1] The total area is 209.43 km².

The modern city of Akaiwa was established on March 7, 2005, from the merger of the towns of Akasaka, Kumayama, San'yō and Yoshii (all from Akaiwa District).

Akaiwa is one of three remaining places in Japan that produces the bamboo stalk for fude ink brushes. The harvested bamboo stalks are spread in the dry riverbed of the Yoshii River during the winter to dry under the sun. The stalks are then boiled in the town to remove impurities.[2]

Akaiwa is home to the Kumayama Archeological Site. The site was utilized as a sacred spot as early as the Yayoi period. A Buddhist temple, Reizan-ji, was active on Mount Kuma (507.8 m (1,666 ft)) from the early Nara to the Muromachi period. A 11.7 m (38 ft) stone base remains on the site, and is protected by the Japanese government. The stone base originally supported a large Buddhist statue.[3]

Akaiwa city office
Akaiwa city office


  1. ^ "Official website of Akaiwa city" (in Japanese). Japan: Akaiwa City. Retrieved 14 April 2017.
  2. ^ 竹筆軸:「カラン」と天日干し 岡山の河川敷[permanent dead link] (in Japanese)
  3. ^ "Kumayama Iseki". Nihon Rekishi Chimei Taikei (日本歴史地名大系 “Compendium of Japanese Historical Place Names”) (in Japanese). Tokyo: Netto Adobansusha. 2012. Archived from the original on 2007-08-25. Retrieved 2012-02-21.