Founded in 1885, the Nankai Electric Railway Co., Ltd. was the first railway company in Japan to be established purely by private capital. It currently operates three main lines from its landmark terminal in Namba, Osaka: the Nankai Line to Wakayama, the Koya Line to the Koyasan (Mount Koya) World Heritage Site and a line running to the Kansai International Airport.

While focused mainly on railway, bus and other transportation operations, the Nankai Group is also involved in real estate (rental office space and residential developments), retail (shopping center management), amusement park and golf course management, office building maintenance and other leisure and service businesses, as well as construction and other operations.