The story
Arashiyama Line
The Arashiyama Tram opened the line in 1910, with 1,435 mm (4 ft 8+1⁄2 in) gauge and electrified at 600 V DC. The Kyoto Electric Light Company acquired the line in 1918, and double-tracked the track between 1925 and 1928. Keifuku acquired the line in 1942.
Kitano Line
The Kyoto Electric Light Company opened the line between 1925 and 1926, and double-tracked the Tokiwa to Narutaki section in 1930. Plans to double-track the rest of the line were abandoned as a result of the economic depression. Keifuku acquired the line in 1942.
Former connecting lines
Arashiyama Station: A 3 km (1.9 mi) 1,435 mm (4 ft 8+1⁄2 in) line electrified at 600 V DC and dual track except for the Kiyotaki tunnel operated to Kiyotaki between 1929 and 1944. It connected to a 2 km (1.2 mi) 1,067 mm (3 ft 6 in) funicular which climbed 638 m (2,093 ft) to Atago Jinja on Mount Atago, Kosaku line which operated for the same period. Closed due to war time austerity measures, efforts to re-establish the incline in the 1950s were unsuccessful. (Atagosan Tetsudo)
From Wikipedia’s article on Keifuku Electric Railroad, shared under CC BY-SA 4.0.4