Kusatsu Onsen (草津温泉) is a hot spring resort located in Gunma Prefecture, Japan, northwest of Tokyo. It is a popular tourist destination.
There are 13 public baths at Kusatsu Onsen. The small bathhouses that are free for both town residents and tourists are managed by the townspeople themselves.[1]
The source of its hot water is nearby Mount Kusatsu-Shirane and the appearance of the waters range from cloudy to clear, because the sources of the water that the baths rely upon are different.[2]
The springs were known as a resort for centuries, but they became well known after the water was recommended for its health benefits by Erwin von Bälz, a German doctor who taught medicine at Tokyo University.[3]
The locals claim the hot springs can cure all forms of ailments, other than lovesickness. Guests have claimed that pain disappears while soaking in its hot water.[4]