[1] Limited Express Kusatsu/Shima[2] trains operate between Ueno in Tokyo and Naganohara-Kusatsuguchi on the Agatsuma Line, stopping only at Shibukawa and Nakanojō.

[4] On 1 October 1952, the line was extended to Ōshi Station (太子駅), initially for freight only, but passengers services were also introduced from 21 June 1954.

[citation needed] With the privatization of JNR on 1 April 1987, the Agatsuma Line came under the ownership of JR East.

[citation needed] The construction of the Yamba Dam required the realignment of the Agatsuma line between Iwashima and Naganohara-Kusatsuguchi.

The famous hot springs at Kusatsu are some distance north of the line, but several rural onsen such as those at Shima, Sawatari, Kawarayu, and Shiriyaki are more accessible.