July 21, 1931: Seven sections, including the three shared-track sections totaling 2.5 km between Kadoma Station and Kayashima Station, and the shared track of 1.5 km between Hirakata-koen Station and Korien Station, came to have the exclusive track.
1931年（昭和6年）7月21日門真～萱島間の併用軌道3区間2.5kmと枚方公園～香里園間の併用軌道1.5kmなど7区間が専用軌道化された。