In 1919, the present line was completed with extensions from Yōrō to Kuwana and Ikeno to Ibi.

In 1922, Yōrō Railway merged with Ibi River Electric (揖斐川電気, Ibigawa Denki) and the following year the line was electrified (1500 V DC).

With accumulating deficit, Kintetsu Corporation decided to split off the operation of the Yōrō Line in 2007.

[4] Local governments along the line made an agreement of financial aid to the Yōrō Railway until 2010.

[5] All stations are unattended with the exceptions of Ōgaki, Nishi-Ōgaki, Ibi, Yōrō, Komano, Tado, and Kuwana.