is a town located in Sayà  District, Hyà Âgo Prefecture, Japan. , the town had an estimated population of 15,701 in 6797 households and a population density of 51 persons per km<sup>2</sup>. The total area of the town is .
Sayo is located in the southwestern part of Hyà Âgo Prefecture in the basin along the Sayogawa River in the Chikusa River system. Approximately 80% of the town area is occupied by hills and forests. In the early morning from late autumn to winter, there is often a fog called "Sayo morning fog".
Hyà Âgo Prefecture
Okayama Prefecture
Sayà  has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Sayà  is 13.8 ðC. The average annual rainfall is 1488 mm with September as the wettest month. The temperatures are highest on average in August, at around 25.9 ðC, and lowest in January, at around 2.6 ðC.
Per Japanese census data, the population of Sayà  has declined steadily over the 70 years.
Sayà  is located in ancient Harima Province, and the name appears in the Heian period Engishiki records. From the Kamakura period Hirafuku-juku prospered as a post town on the Inaba Kaidà Â, the main highway from Kyoto and Osaka to Inaba Province in western Japan, and in the Nanboku-chà  period, the Akamatsu clan built Rikan Castle overlooking the town. In 1600, the Ikeda clan of Himeji Domain built three-story tenshu and established a cadet domain called "Hirafuku Domain" for Ikeda Teruoki. In 1697, the Tokugawa shogunate established Mikazuki Domain, who ruled parts of Sayà  until the Meiji restoration in 1871. The villages of Sayo and Hirafuku were established with the creation of the modern municipalities system on April 1, 1889. Both were elevated to town status on October 1, 1928. On March 1, 1955, Sayo and Hirafuku merged with the neighboring villages of Ekawa, Ishii and Nagatani to form the town of Sayà  On October 1, 2005, the towns of Kà Âzuki, Mikazuki and Nankà Â, all from Sayà  District were merged into Sayà Â.
In August 2009, around a dozen people in Sayo are dead or missing as a result of flash floods due to Tropical Storm Etau, according to NHK. According to the Japan Times, 390 homes were flooded.
Sayà  has a mayor-council form of government with a directly elected mayor and a unicameral town council of 14 members. Sayà Â, together with the city and district of Akà Â, contributes one member to the Hyogo Prefectural Assembly. In terms of national politics, the town is part of Hyà Âgo 12th district of the lower house of the Diet of Japan.
Sayà  has mostly a rural economy based on agriculture and forestry.
Sayà  has four public elementary schools and four public middle schools operated by the town government and one public high school operated by the Hyà Âgo Prefectural Department of Education. There is also one private middle school and one private high school.
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