The area around Kōnandai Station was controlled by the American military in the post-war era. The property was returned to the Japanese government by 1965 and developed into a housing district. The
Japan National Railways (JNR) Keihin-Tōhoku Line was extended from its former terminus at
Yōkōdai Station through to Ōfuna Station in 1973, and Kōnandai Station was opened on 9 April 1973. The station came under the management of JR East on April 1, 1987, after the
privatization of the JNR. ==Passenger statistics==