is a city located in Yamanashi Prefecture, Japan. As of 1 February 2023, the city had an estimated population of 23,158 in 9987 households, and a population density of 140 persons per kmò. The total area of the city is .
Uenohara is located on the extreme eastern edge of Yamanashi Prefecture, on a fluvial terrace of the Sagami River.
The climate in the city is characterized by hot, humid summers and relatively mild winters (Köppen climate classification Cfa). The average annual temperature in Uenohara is 13.4 ðC. The average annual rainfall is 1497 mm, with September being the wettest month. The highest temperatures are typically in August, averaging around 25.5 ðC, and the lowest in January, averaging around 2.2 ðC.
Per Japanese census data, Uenohara's population peaked around the year 2000 and has been declining since.
The area around present-day Uenohara was heavily settled during the Jà Âmon period, and numerous Jà Âmon sites have been found within the city limits. However, there are fewer Yayoi period sites. During the Nara period ritsuryo organization of Kai Province, the area came under Tsuru County. From the middle of the Kamakura period, much of the province came under the control of the Takeda clan, although as a border area adjacent to the holdings of the Uesugi clan and the Odawara Hà Âjà  clan, it was the location of many skirmishes and battles. During the Edo period, all of Kai Province was tenryà  territory under the direct control of the Tokugawa shogunate. During this period, the Kà Âshà « Kaidà Â, one of the Edo Five Routes, passed through Uenohara, which had four of the 45 post stations on that route. The area was also a noted center for sericulture.
After the Meiji restoration, the village of Uenohara was established on December 27, 1897, with the creation of the modern municipalities system. Uenohara became a town on April 1, 1955, by annexing seven neighboring villages. The modern city of Uenohara was established on February 13, 2005, by the mergers of the former town of Uenohara (from Kitatsuru District), absorbing the village of Akiyama (from Minamitsuru District).
Uenohara has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 16 members.
The economy of Uenohara is dominated by agriculture, sericulture and textile manufacturing.
Uenohara has five public elementary schools and three public junior high schools operated by the city government and one public high school operated by the Yamanashi Prefectural Board of Education. There is also one private high school. The city also hosts the private Teikyo University of Science.