The is a Japanese railway line operated by the private railway operator Keio Corporation, connecting Hashimoto Station in Sagamihara, Kanagawa Prefecture and Chà Âfu Station in Chà Âfu, Tokyo.
Rapid and Semi express services stop at all stations on this line.
The line opened as a one-stop single-track spur from Chà Âfu to Keià Â-Tamagawa on 1 June 1916, electrified at 600 V DC, and was double-tracked on 1 April 1924. On 1 May 1937, Tamagawara was renamed Keià Â-Tamagawa, and on 4 August 1963, the voltage was increased to 1,500 V DC.
The line was extended (all extensions were electrified dual track) on 1 April 1971, to Keià Â-Yomiuri-Land. Subsequent extensions brought the line to Keià Â-Tama-Center (18 October 1974), Minami-à Âsawa (22 May 1988) and Hashimoto (30 March 1990). Tamasakai station opened on 6 April 1991.
In 2012, the Chofu to Keià Â-Tamagawa section was relocated underground.
Station numbering was introduced on 22 February 2013.
This article incorporates material from the corresponding article in the Japanese Wikipedia.