 In 1944, following mergers with other Kansai area railway companies, Kankyū became Kintetsu and the line came under its current ownership and name.Although the city of Ujiyamada (the basis for the name "Yamada Line") changed its name to Ise in 1955, the train line still maintains the same name to this day.Even though Kintetsu owned both the Nagoya Line and the Yamada Line, direct service between Nagoya and Ujiyamada was not possible because the Sankyū Main Line (Yamada Line) was built using a railway gauge of , however the Sankyū Ise Line (Nagoya Line) was built using a gauge of , so it was necessary for passengers to change trains at Ise-Nakagawa.