is a town located in Kanagawa Prefecture, Japan. , the town had an estimated population of 31,262 and a population density of 1820 persons per kmò. The total area of the town is .
à Âiso is located on the coastline of central Kanagawa Prefecture, facing Sagami Bay of the Pacific Ocean. The area is generally hilly, rising to Mount Koma (168 metres) in the northwest of the centre of town. The coastline of à Âiso is sandy and is regarded as the western end of the Shà Ânan area. à Âiso remains a popular beach resort and holiday spot for residents of Tokyo.
Kanagawa Prefecture
à Âiso has a humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in à Âiso is 15.8 ðC. The average annual rainfall is 2144 mm with September as the wettest month. The temperatures are highest on average in August, at around 25.7 ðC, and lowest in January, at around 5.2 ðC.
Per Japanese census data, the population of à Âiso has grown steadily over the past century, with a slight drop from 2010 to 2020.
à Âiso is the ancient centre of Sagami Province. The exact location of the Nara period provincial government of Sagami Province is unknown, but tradition and the place name "Kà Âzu" place its probable location within the boundaries of present-day à Âiso.
As a minor coastal settlement, à Âiso was under the control of the later Hà Âjà  clan of Odawara during the Sengoku period. In the Edo period, it was nominally part of Odawara Domain, and developed as à Âiso-juku, a post town on the Tà Âkaidà  connecting Edo with Kyoto. After the Meiji Restoration and with the establishment of the district system in 1878, it came under the control of . à Âiso became a town on 1 April 1889 with the creation of the modern municipalities system. Blessed with a temperate climate, and with convenient access to Tokyo due to the Tà Âkaidà  Main Line railway, it was favoured as a seaside health resort by politicians and literary figures during the Meiji period after a glowing report on its location was written by noted physician Matsumoto Jun. Prime Minister Ità  Hirobumi, Yamagata Aritomo, Saionji Kinmochi and à Âkuma Shigenobu, Foreign Minister Mutsu Munemitsu, writer Shimazaki Toson and zaibatsu founder Yasuda Zenjirà  had summer residences in à Âiso. This popularity continued into the postwar era, and Prime Minister Shigeru Yoshida also had a residence in à Âiso to which he retired after leaving politics. The former Ità Â, Yoshida and Shimazaki residences have been preserved as memorial museums.
à Âiso merged with neighbouring town Kokufu on 1 December 1954.
à Âiso has a mayor-council form of government with a directly elected mayor and a unicameral town council of 14 members. à Âiso, together with neighboring Ninomiya, contributes one member to the Kanagawa Prefectural Assembly. In terms of national politics, the town is part of Kanagawa 15th district of the lower house of the Diet of Japan.
The local economy of à Âiso is based primarily on seasonal tourism, agriculture and commercial fishing. The town is also a bedroom community for both Tokyo/Yokohama and Odawara
à Âiso has one public elementary schools and one public middle schools operated by the town government. The town has one public high school operated by the Kanagawa Prefectural Board of Education. There is also one private elementary school, middle school and high school. The private Seisa University has a campus at à Âiso.
JR East - Tà Âkaidà  Main Line
There are several tourist attractions.
Terugasaki in à Âiso is known as location where the White-bellied green pigeons come to drink saltwater.