 However, at that time the Osaka Line, which was operated under a different name by Osaka Electric Railroad ("Daiki"), only ran to and Sankyū managed the section from Sakurai to ; this railway was known as the .During the construction of the eastern-most section of the Sankyū Main Line (most of what is now the Yamada Line), another private railway company, Ise Electric Railway ("Iseden"), was constructing another line right alongside that would eventually link with and was known as the Iseden Main Line.The two lines opened within just a few weeks of each other in 1930 which led to there being three parallel lines (the third being the Sangū Line) owned by three different companies running between Matsusaka and Ujiyamada.