Okayama is the capital city of Okayama Prefecture in the Chūgoku region of Japan. The city was founded on June 1, 1889. , the city has an estimated population of 700,940 and a population density of 890 persons per km2. The total area is .
The city is the site of Kōraku-en, known as one of the top three traditional gardens in Japan, and Okayama Castle, which is ranked among the best 100 Japanese castles. The city is famous as the setting of the Japanese fable "Momotarō". Okayama joined the UNESCO Global Network of Learning Cities in 2016.
The city of Okayama is located in the southern part of Okayama Prefecture, which is located in western part of the island of Honshū. The northern part of the city forms a corner of Kibi Plateau, which is a series of gentle hills, and includes the Asahikawa Dam, Okayama Airport, and a suburban residential area. The central urban area is located on the Okayama Plain in the south, which was formed by the transportation and sedimentation of two first-class rivers, the Asahi River and Yoshii River, which flow into the Seto Inland Sea. To the south of the main urban area is Kojima Bay, which forms the scenic Kojima Peninsula overlooking the Seto Inland Sea.
Okayama Prefecture
Kurashiki
Tamano
Sōja
Bizen
Setouchi
Akaiwa
Kibichūō
Kumenan
Misaki
Hayashima
Okayama has a mild climate in comparison to most of Japan. It has the most rain-free days (less than 1mm of precipitation) of any city in Japan. It is ranked as the second driest and the fourth sunniest city in the Chūgoku region. The climate is classified under the Köppen climate classification as humid subtropical (Cfa).
The local climate is warm enough throughout the year to support olive trees. Okayama is often called "Land of Sunshine" because of its low number of rainy days per year.
Per Japanese census data, the population of Okayama is as follows:
Before the Muromachi period, Okayama was one corner of a farm region and included a small castle built by the Kanemitsu.