It runs between Tokyo (Ueno or Shinjuku stations) and Maebashi in Gunma Prefecture.

[4] Until March 2016,[5] one return service to and from Shinjuku continued to use 185 series rolling stock.

[7] From the start of the revised timetable on 15 March 2014, eleven Akagi services running during weekday peak commuting hours were renamed Swallow Akagi (スワローあかぎ) with all ordinary-class seats reservable.

[4] Since 13 March 2021, this limited express no longer runs on the Ryomo or Joetsu Lines.

Northbound services terminate at Takasaki instead of continuing on to Shin-Maebashi or Maebashi.