Koma (Iwate)

Weekday departures: 59/day in the available timetable data · Sat & holiday departures: 55/day in the available timetable data

Earliest / latest departure in the available data (weekday): 6:07 / 23:06

Busiest hour in the available data: 7:00–8:00 (7)

0:00 ─ 23:00

Figures are typical departures in the timetable data, not a live service count.

Timetable data as of 7 August 2026.

The timetable data is incomplete for some or all lines at this station, so the weekday and Sat & holiday figures are departures in the available timetable data, not totals.

Lines where the timetable data is complete: Iwate Galaxy Railway Line

Lines where the timetable data is incomplete:

• JR Hanawa Line: no timetable data

• Iwate Galaxy Railway Line: Iwate-Kawaguchi ⇄ Shibutami

Kōma Station opened on 1 September 1891 as a Nippon Railway stop serving Tamayama village in present-day Morioka. It became a government station with the line's nationalisation in November 1906, and gained a junction role on 27 August 1922 when the Hanawa Line was completed. Freight handling ended in November 1978 and parcel handling in March 1985 before JR privatisation transferred the station to JR East on 1 April 1987. With the Tohoku Shinkansen's Hachinohe extension on 1 December 2002, the Morioka-Metoki portion of the Tōhoku Main Line passed to IGR Iwate Galaxy Railway, and Kōma became a joint-use station under IGR management. A bridge-style building with east-west free passage opened on 15 May 2011.

Poet Ishikawa Takuboku boarded a Tokyo-bound train at Kōma when leaving his home village; Shibutami Station, today's nearest stop to his birthplace, did not yet exist.