Yodo River
Geologically, the plain is considered to be an alluvial plain mainly consisting of hills and plateaus created during Pliocene and Pleistocene and deltas created during Holocene by current rivers such as the Yodo River and Yamato River. Prominent hills and plateaus include the Senri Hills, Toyonaka Plateau, and Itami Plateau to the north; the Hirakata Hills and Katano Plateau to the northeast; and the Kasen Hills, Shinodayama Plateau, Mikunigaoka Plateau, and Uemachi Plateau to the south. Major streams are the Muko River, Ina River, Ibaraki River, and Akuta River located in the northern portion; and the Yodo River and Yamato River in the eastern section; and the Ishizu River, Ōtsu River, and Onosato River in the southwestern part of the plain.