Ōsakasayama
大阪狭山市
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Ōsakasayama City Hall
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Location of Ōsakasayama in Osaka Prefecture
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  Ōsakasayama Location in Japan | |
| Coordinates: 34°30′N 135°33′E / 34.500°N 135.550°E / 34.500; 135.550 | |
| Country | Japan |
| Region | Kansai |
| Prefecture | Osaka |
| Government | |
| • Mayor | Tomoyoshi Yoshida (since April 2003) |
| Area | |
| • Total | 11.92 km2 (4.60 sq mi) |
| Population
(January 31, 2022)
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| • Total | 58,465 |
| • Density | 4,900/km2 (13,000/sq mi) |
| Time zone | UTC+09:00 (JST) |
| City hall address | 1-2384-1 Sayama, Sayama-shi, Osaka-fu 589-8501 |
| Website | Official website |
| Symbols | |
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| Flower | Azalea |
| Tree | Cherry blossom |
Ōsakasayama (大阪狭山市, Ōsakasayama-shi) is a cityinOsaka Prefecture, Japan. As of 31 January 2022[update], the city had an estimated population of 58,465 in 26128 households and a population density of 4900 persons per km2.[1] The total area of the city is 11.92 square kilometres (4.60 sq mi).
Ōsakasayama is located in the southeastern part of Osaka Prefecture. Sayama pond, which is said to be the oldest dam-type reservoir in Japan, is located in the center of the city and is a symbol of the city.
Osaka Prefecture
Ōsakasayama has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Ōsakasayama is 14.6 °C. The average annual rainfall is 1475 mm with September as the wettest month. The temperatures are highest on average in August, at around 26.6 °C, and lowest in January, at around 3.2 °C.[2]
Per Japanese census data,[3] the population of Ōsakasayama has increased form the 1960s through 1990s and has now leveled off.
| Year | Pop. | ±% |
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| 1920 | 5,160 | — |
| 1930 | 5,732 | +11.1% |
| 1940 | 6,361 | +11.0% |
| 1950 | 9,114 | +43.3% |
| 1960 | 9,648 | +5.9% |
| 1970 | 19,198 | +99.0% |
| 1980 | 46,508 | +142.3% |
| 1990 | 54,319 | +16.8% |
| 2000 | 56,996 | +4.9% |
| 2010 | 58,238 | +2.2% |
The area of the modern city of Ōsakasayama was within ancient Kawachi Province. From 1600 to the Meiji restoration it was the seat of the Later Hōjō clan, rulers of Sayama Domain under the Tokugawa shogunate. The area became part of Osaka Prefecture from 1881. The villages of Sayama was created with the establishment of the modern municipalities system on April 1, 1889. On April 1, 1896 the area became part of Minamikawachi District, Osaka. Sayama was elevated to town status on April 1, 1951. On October 1, 1987, Sayama was raised to city status. To avoid confusion with the city of SayamainSaitama Prefecture, the name was changed to Ōsakasayama.
Ōsakasayama has a mayor-council form of government with a directly elected mayor and a unicameral city council of 15 members. Ōsakasayama, collectively with Tondabayashi and the smaller municipalities of Minamikawachi District contributes two members to the Osaka Prefectural Assembly. In terms of national politics, the city is part of Osaka 15th district of the lower house of the Diet of Japan.
Due to its location next to the large metropolis of Osaka City and Sakai, Sayama has developed into a commuter town with large New Town developments from the 1970s through 1990s, inlacing the large-scale Sayama New Town, in the southern part of the city. Traditionally, the area was known for growing grapes.
Ōsakasayama has seven public elementary schools and three public middle schools operated by the city government and one public high school operated by the Osaka Prefectural Department of Education. The medical school of Kindai University is located in Ōsakasayama.
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