Yao, Osaka

Yao (八尾市, Yao-shi) is a city located in Osaka Prefecture, Japan. As of 31 January 2022, the city had an estimated population of 263,436 in 126509 households and a population density of 6300 persons per km².[1] The total area of the city is 41.72 square kilometres (16.11 sq mi). The city is the birthplace of the Kawachi ondo style of folk singing.

For other uses, see Yao (disambiguation).
Yao
八尾市
Core city
Yao City Hall
Yao City Hall
Flag of Yao
Flag
Official seal of Yao
Seal
Location of Yao in Osaka Prefecture
Location of Yao in Osaka Prefecture
Yao is located in Japan
Yao
Yao
Location in Japan
Coordinates: 34°37′36.73″N 135°36′3.55″E
CountryJapan
RegionKansai
PrefectureOsaka
Government
 • MayorKeisuke Daimatsu
Area
 • Total41.72 km2 (16.11 sq mi)
Population
 (January 31, 2022)
 • Total263,436
 • Density6,300/km2 (16,000/sq mi)
Time zoneUTC+09:00 (JST)
City hall address1-1-1 Honmachi, Yao-shi, Osaka-fu 581-0003
ClimateCfa
WebsiteOfficial website
Symbols
FlowerChrysanthemum
TreeGinkgo

Geography

Yao is locate adjacent to the central part of the Osaka Plain and southeast of Osaka metropolis. The west side of the city area is almost flat with an average elevation of only ten meters above sea level. The land rises in the east, with the Ikoma Mountains forming the prefectural border with Nara Prefecture. In addition to the Yamato River flowing at the southern end of the city, there are many small rivers.

Neighboring municipalities

Osaka Prefecture

Nara Prefecture

Climate

Yao has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Yao is 16.9 °C (62.4 °F). The average annual rainfall is 1,263.9 mm (49.76 in) with September as the wettest month. The temperatures are highest on average in August, at around 29.1 °C (84.4 °F), and lowest in January, at around 5.5 °C (41.9 °F).[2]

Climate data for Yao (2003−2020 normals, extremes 2003−present)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 18.9
(66.0)		 23.8
(74.8)		 25.4
(77.7)		 30.4
(86.7)		 32.8
(91.0)		 33.5
(92.3)		 38.2
(100.8)		 38.9
(102.0)		 37.0
(98.6)		 33.0
(91.4)		 28.1
(82.6)		 26.1
(79.0)		 38.2
(100.8)
Average high °C (°F) 9.4
(48.9)		 10.5
(50.9)		 14.5
(58.1)		 20.0
(68.0)		 25.1
(77.2)		 28.4
(83.1)		 31.9
(89.4)		 33.7
(92.7)		 29.7
(85.5)		 23.8
(74.8)		 18.0
(64.4)		 12.0
(53.6)		 21.4
(70.5)
Daily mean °C (°F) 5.5
(41.9)		 6.3
(43.3)		 9.6
(49.3)		 14.9
(58.8)		 20.0
(68.0)		 23.9
(75.0)		 27.7
(81.9)		 29.1
(84.4)		 25.2
(77.4)		 19.2
(66.6)		 13.5
(56.3)		 8.0
(46.4)		 16.9
(62.4)
Average low °C (°F) 1.4
(34.5)		 2.0
(35.6)		 4.9
(40.8)		 9.8
(49.6)		 15.1
(59.2)		 20.0
(68.0)		 24.2
(75.6)		 25.3
(77.5)		 21.3
(70.3)		 15.0
(59.0)		 9.0
(48.2)		 3.8
(38.8)		 12.6
(54.7)
Record low °C (°F) −3.6
(25.5)		 −4.5
(23.9)		 −1.5
(29.3)		 0.6
(33.1)		 6.7
(44.1)		 12.7
(54.9)		 17.6
(63.7)		 18.0
(64.4)		 13.4
(56.1)		 6.1
(43.0)		 1.8
(35.2)		 −2.7
(27.1)		 −4.5
(23.9)
Average precipitation mm (inches) 47.1
(1.85)		 63.9
(2.52)		 99.9
(3.93)		 88.2
(3.47)		 117.8
(4.64)		 149.0
(5.87)		 169.8
(6.69)		 103.1
(4.06)		 137.4
(5.41)		 142.1
(5.59)		 71.9
(2.83)		 57.1
(2.25)		 1,263.9
(49.76)
Average precipitation days (≥ 1.0mm) 5.6 7.0 9.4 9.1 9.3 10.5 11.1 7.9 10.2 9.1 7.2 6.5 102.7
Source: Japan Meteorological Agency[2][3]

Demographics

Per Japanese census data,[4] the population of Yao increased rapidly from the 1960s through 1970s, and has leveled off since.

Historical population
YearPop.±%
1960 92,525—    
1970 123,035+33.0%
1980 227,778+85.1%
1990 272,706+19.7%
2000 274,777+0.8%
2010 268,652−2.2%

History

Premodern

The area of the modern city of Yao was within ancient Kawachi Province and is built on land which was once Kawachi Bay. This area was a fertile delta along Old-Yamato River, and has been cultivated since Yayoi period. In the Kofun period, many powerful clans settled here and built kofun burial mounds in the foothills of the Ikoma mountain range. In Asuka period, this area was under the control of Mononobe clan. The clan was destroyed when Mononobe no Moriya was defeated by Soga no Umako. The Yuge clan, which was a cadet branch of Mononobe clan, however, kept control on the area. The monk Dōkyō, who was from Yuge clan, became the most powerful person in the late Nara period through his relationship with Empress Shōtoku. He constructed Saikyo (West Capital) called Yuge-gu in this area, from which he intended rule the nation prior to his fall from power. Takayasu Castle, an ancient castle on Mount Takayasu, was constructed for defense against Tang dynasty, after Yamato was defeated at the Battle of Baekgang in Korean Peninsula and rediscovered by archaeologists in 1978. During the Nara period, the area Yao prospered as a transportation hub between Yamato Province, Naniwa-kyō and the seacoast. During the Heian period, the area was dominated by large shōen landed estates controlled by Buddhist temples and the nobility. In the Sengoku period the area was the site of several battles, including during the summer campaign of Siege of Osaka.

Before the middle term of Edo period, the Yamato river flowed from south to north and joined to the Yodo River. However, due to flooding, the Tokugawa shogunate undertook a large public works project to change the flow of the Yamato River from east to west, to empty into Osaka Bay directly. The construction decreased number of floods, and enabled this area to develop more paddy fields. In addition, cotton cultivation flourished in this area.

Modern

After the Meiji restoration, the area became part of Osaka Prefecture. The village Yao created with the establishment of the modern municipalities system on April 1, 1889, although the name "Yao" appears as far back as Heian period documents. On April 1, 1896 the area became part of Nakakawachi District, Osaka. Yao was elevated to town status on August 1, 1903. On April 1, 1948, Yao merged with the town of Ryuge and the villages of Kyuhoji, Taisho, and Nishigo to form the city of Yao.

Government

Yao has a mayor-council form of government with a directly elected mayor and a unicameral city council of 28 members. Yao contributes three members to the Osaka Prefectural Assembly. In terms of national politics, the city is part of Osaka 14th district of the lower house of the Diet of Japan.

Economy

Yao is traditionally known for its production of toothbrushes, and still accounts for 40% of the Japanese market, although the contribution of toothbrush manufacturing to the total local economy is very small. The city is now known as a center for light and medium manufacturing.

Companies based on Yao

Education

Colleges and universities

Primary and secondary education

Yao has 28 public elementary schools, 15 public middle schools and four public high schools operated by the Osaka Prefectural Department of Education. There is also one private middle school and one private high school. The prefecture also operates on special education school for the handicapped.

Prefectural senior high schools

Private junior and senior high school

Special needs education

Transportation

Airports

Railway

JR West – Yamatoji Line

JR West – Osaka Higashi Line

Kintetsu Railway - Kintetsu Osaka Line

Kintetsu Railway - Kintetsu Shigi Line

Kintetsu Railway - Nishi-Shigi Cable Line

Osaka Metro - Tanimachi Line:

Highway

Local attractions

Sister and Friendship cities

Notable people from Yao

References
  1. "Yao city official statistics" (in Japanese). Japan.
  2. "平年値（年・月ごとの値）". JMA. Retrieved May 19, 2021.
  3. "観測史上1～10位の値（年間を通じての値）". JMA. Retrieved May 19, 2021.
  4. Yao population statistics
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