Kuroiso

Weekday departures: 38/day in the available timetable data · Sat & holiday departures: 38/day in the available timetable data

Earliest / latest departure in the available data (weekday): 5:27 / 21:51

Busiest hour in the available data: 6:00–7:00 (3)

0:00 ─ 23:00

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

Timetable data as of 3 May 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 incomplete:

• Tohoku Main Line: timetable covers only part of the line

• Tohoku Main Line: Nasushiobara

Kuroiso Station opened on 1 December 1886 as a Nippon Railway station in what is now Nasushiobara, Tochigi. It came under the Japanese Government Railways with the nationalisation of Nippon Railway on 1 November 1906 and into JNR ownership in June 1949. The Tōhoku Main Line was electrified to Kuroiso at 1.5 kV DC on 22 May 1959, and the section north to Shiroishi at 20 kV 50 Hz AC on 1 July 1959, leaving an AC/DC neutral section inside the station. The dead section was relocated to a bridge north of the platforms on 1 January 2018, after a 2008 fatality and a 2013 conversion of the station's overhead wiring to DC.

Kuroiso is the boundary between the DC-electrified Utsunomiya Line section to the south and the AC-electrified section of the Tōhoku Main Line to the north; electric multiple units running through used to lower their pantographs at the station, and trains hauled by electric locomotives were changed to AC- or DC-powered locomotives there.