[1] The first 8000 series diesel car, 8001, entered revenue service on 26 March 2016.

[2] The individual car histories of the two-car 7000 series set were as follows.

[2] The line opened on 14 March 1985 between Mito and Kita-Kashima (now Kashima Soccer Stadium) stations.

[4] Freight operations over the line commenced from 1 November 1989, but were discontinued from 16 March 1996.

[4] Wanman driver-only operation began on the line from 1 April 2001.