The Osaka Line (大阪線, Ōsaka-sen) is a railway line in Japan owned by Kintetsu Railway, connecting Osaka and Mie Prefecture via Nara Prefecture.

(km) 教育大前 The Osaka Electric Railway opened the Osaka Uehommachi to Fuse section as 1,435 mm (4 ft 8+1⁄2 in) gauge dual track electrified at 600 V DC (as were all further sections unless otherwise noted) in 1914.

The Yamato-Takada to Yamato-Yagi section opened (with a single track) the same year, and was then linked to Onji and duplicated in 1927.

The Sangu Express Railway opened the Sakurai to Hase section in 1929, electrified at 1,500 V DC, and extended the line to Ise-Nakagawa the following year, single track beyond Nabari.

The voltage on the Osaka Uehommachi to Fuse section was increased to 1,500 V DC in 1956, the Nabari to Iga-Kozu section was double-tracked between 1959 and 1961, and the rest of the line double-tracked between 1967 and 1975, when the 5,652 m Shin Aoyama tunnel was opened, at the time the longest tunnel built in Japan by a private railway.