Okayama (, Okayama-shi) is the capital city of Okayama Prefecture in the Chgoku region of Japan. The city was founded on June 1, 1889. As of August 2010, the city has an estimated population of 705,224 and a population density of 893persons perSquare kilometers. The total area is 789.88Square kilometers. The city is the site of Kraku-en and the black Okayama Castle, which is ranked among the best 100 Japanese castles. The city is famous as the setting of the Japanese fable "Momotar". Before the Muromachi period, Okayama was one corner of a farm region and included a small castle built by the Kanemitsu. In the Sengoku period, Ukita Naoie attacked Okayama and attacked the castle for the transportation resources and extensive farmland in the region. Naoie remodeled the castle, built the old Sanyo road to the central part of the castle town, and called in tradesmen both from inside and outside of Bizen province. Okayama became the political and economical capital of Bizen province.