However, Osaka City, which had taken a position on municipal management that was reminiscent of the Monroe Doctrine, was reluctant to construct a line outside Osaka City, and finally, based on Osaka Prefecture's proposal, it was decided in 1974 that Osaka City should construct a line up to Nagata Station (Osaka Prefecture) in Higashi-Osaka City and Kintetsu should construct a line extending from the station.
しかし、市営モンロー主義を採る大阪市が市域外に新線を建設することに難色を示したため、1974年に大阪府の提案で最終的に大阪市が東大阪市長田駅(大阪府)までを建設し、そこから先は近鉄が建設することで話がまとまった。