Such plans remained out of discussion for some time after that, but since the thirteenth report of the Council for Urban Transport (in 1971) included the description that the "Osaka City [Municipal] Subway Chuo Line must urgently be extended in order to improve transport conditions up to Ikoma Station," the momentum for constructing the new line increased again.
その後しばらくこの話は放置されていたが、1971年に出された都市交通審議会答申第13号で「大阪市営地下鉄中央線を延伸して生駒駅まで緊急に整備すべき」とされたことから再び新線建設の機運が高まった。