Komagawa

Weekday departures: 93/day+ · Sat & holiday departures: 63/day+

First / last train (weekday): 5:09 / 23:06

Busiest hour: 7:00–8:00 (10)

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0:00 ─ 23:00

Counts are departures in the timetable data shown on our live map. Some lines at this station are not yet in our schedule data, so these counts are a minimum.

• Hachikō Line: Moro ⇄ Higashi-Hannō

Komagawa Station opened on 15 April 1933 with the Ministry of Railways' Hachikō Line section between Higashi-Hannō and Ogose, taking its name from the former Komagawa village. The Kawagoe Line from Ōmiya reached the station on 22 July 1940, making it a junction. A private siding to a Nihon Cement plant (later Taiheiyō Cement) ran from May 1963 until withdrawal in September 1999. The Kawagoe Line was electrified on 30 September 1985, and the Hachikō Line south to Hachiōji on 16 March 1996. Operation transferred to JR East at the 1987 privatisation. A new station building entered service on 8 December 2024 and a free east–west passageway opened on 20 March 2026.

The Hachikō Line splits operationally at Komagawa: services run as electrified trains south to Hachiōji and as diesel cars north toward Takasaki, with no direct through-running between the two halves since the 1996 electrification.