The Keikyu Daishi Line is a 4.5 km (2.8 mi) railway line in Kanagawa Prefecture, Japan, operated by the private railway operator Keikyu. It connects Keikyu Kawasaki Station and Kojimashinden Station, both located in Kawasaki-ku, Kawasaki.

Kanagawa Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Kanagawa Prefecture is the second-most populous prefecture of Japan at 9,221,129 and third-densest at 3,800 inhabitants per square kilometre (9,800/sq mi). Its geographic area of 2,415 km2 (932 sq mi) makes it fifth-smallest. Kanagawa Prefecture borders Tokyo to the north, Yamanashi Prefecture to the northwest and Shizuoka Prefecture to the west.