[2] It is called Kusatsu Shirane to differentiate it from the Mount Nikkō-Shirane on the other side of Gunma Prefecture.

The summit of Kusatsu-Shirane volcano, located immediately north of Asama volcano, consists of a series of overlapping pyroclastic cones and three crater lakes.

The largest of these is Yu-gama, an acidic emerald green lake with rafts of yellow sulfur sometimes seen floating on its surface.

[6] The next day, new activity forced police to suspend search operations.

[7] One month after the eruption, it was announced by prefectural officials that only the summit of the volcano was off limits to the public.