The area of the modern city of Izumisano was within ancient
Izumi Province. The area also had many
Kofun period burial mounds from the 5th to 7th century AD. From the
Kamakura to the
Muromachi period a large portion of the area was controlled by
Hine-no-shō, a large
landed estate owned by the
Kujō family of
Court nobility. In the
Edo Period, much of the city area was controlled by
Kishiwada Domain with smaller portions controlled directly by the
Tokugawa shogunate. After the
Meiji restoration, the village of Sano established within Hine District with the creation of the modern municipalities system on April 1, 1889. On April 1, 1896, the area became part of
Sennan District, Osaka. Sano was elevated to town status on October 1, 1911. Sano annexed the village of Kitanakado on April 1, 1937. On April 1, 1948, Sano was promoted to city status. To avoid confusion with
Sano, Tochigi, the city name was chosen to be Izumisano.On April 1, 1954, the city expanded to its present area by annexing the neighboring villages of Minaminakadori, Nagataki, Kaminogo, Hineno and Otsuchi. Kansai International Airport was opened on April 4, 1994, with
Rinku Town commercial development opening in 1995. Izumisano entered into discussions to merge with Sennan, Misaki, Hannan and Tajiri to form the city of "Sennanshu" (南泉州市) from 2001 to 2004; however, per a public referendum, only Misaki was in favor of the merger and the plans were abandoned. ==Government==