The area of the modern city of Daitō was within ancient
Kawachi Province. During the
Jōmon period, the area was under
Kawachi Bay, and inlet of
Osaka Bay. By the
Yayoi period, Kawachi Bay had become a lake, and many settlements arose on its shores. During the
Kofun period, many
burial mounds were built around the foot of Mount Iimori. Lake Kawachi continued to shrink in the
Nara period and
Heian period, and the area developed along the Higashikoya highway, which connected
Mount Koya with
Kyoto and with the coast. During the
Sengoku period, the
Miyoshi clan dominated Kawachi Province from their stronghold at
Iimoriyama Castle. During the
Edo Period, the
Tokugawa shogunate diverted the course of the
Yamato River as part of a massive flood control project, which also resulted in the creation of a large amount of new farmland. In addition to rice, the production of cotton and rapeseed created local prosperity. The villages of Suminodo, Nango and Shijo were established with the creation of the modern municipalities system on April 1, 1889. On April 1, 1896 the area became part of
Kitakawachi District, Osaka. Suminodo was raised to town status on January 1, 1937 and Shijo on April 1,1952. On April 1, 1956 Suminodo, Nango and Shijo to form the city of Daitō. The city suffered from flooding in 1972. ==Government==