The Keinawa Expressway is a 104.9-km-long north–south National Highway with access control in the Kinki region of Japan that connects Kyoto Prefecture to Wakayama Prefecture via Nara Prefecture. It is numbered "E24" under Ministry of Land, Infrastructure, Transport and Tourism's "Expressway Numbering Systemg."

Kyoto Prefecture is a prefecture of Japan located in the Kansai region of Honshu. Kyoto Prefecture has a population of 2,561,358 and has a geographic area of 4,612 square kilometres (1,781 sq mi). Kyoto Prefecture borders Fukui Prefecture to the northeast, Shiga Prefecture to the east, Mie Prefecture to the southeast, Nara Prefecture and Osaka Prefecture to the south, and Hyōgo Prefecture to the west.