The Saku Railway opened the section from Komoro to Haguroshita in 1915, and extended the line to Koumi in 1919. The company planned a railway network extending from
Kōfu in the south to
Naoetsu and
Nagaoka in the north, linking up with the Fuji Minobe Railway to create a coast-to-coast rail line. North of Komoro, Saku Railway obtained a construction permit for a section between Yashiro and Suzaka, but this was transferred to the local Katō Railway (predecessor of the
Nagano Electric Railway). Due to World War I construction of the line south of Koumi was not undertaken. Diesel railcars were introduced on the line in 1930. The Koumi - Saku-Uminokuchi section was opened in 1932 by
Japanese National Railways (JNR), which also opened the Kobuchizawa — Kiyosato section in 1933. The Saku Railway was nationalised in 1934, and the Saku-Uminokuchi - Kiyosato section opened in 1935, completing the line. In July 2017, JR East launched the tourist train
High Rail 1375. "1375" refers to the elevation of 1,375 m of the highest point on any JR line in Japan. The train makes the most of its backdrop, and offers unique services for day and night operations.
Timeline • November 29, 1935: Nobeyama Station opens. • March 1, 1944: Kubo Station renamed Kita-Nakagomi Station. Namezu Station closed. • November 11, 1944: Operations stopped at Managashi, Irizawa, Ōnara, and Otome stations. • March 1, 1952: Second Namezu Station opens. Operations resume at Managashi, Aonuma (formerly Irizawa), Tatsuokajō (formerly Ōnara), Otome stations. • May 1, 1952: Ōtabe Station opens. • July 10, 1952: Higashi-Komoro Station opens. • October 1, 1959: Sakuhozumi Station renamed Yachiho Station. • October 1, 1963: Sandanda Station renamed Usuda Station. • February 1, 1984: Freight operations end. • July 26, 1986: Photo Deck Station opens. • September 1, 1986: Photo Deck Station closes. • April 1, 1987: With the privatization and breakup of JNR, line becomes part of
East Japan Railway Company (JR East). • December 1, 1988: Misato Station opens. • November 8, 1991: KiHa 110 series DMUs begin operation. • March 14, 1992: Driver-only operation begins. • October 12, 1995: Iwamurada — Nakasato section elevated. • October 1, 1997: Sakudaira Station opens. • July 31, 2007: KiHa E200 series hybrid DMUs begin operation. ==See also==