Garameki Onsen sits in the Agatsuma district of Gunma Prefecture, a mountainous area of Japan famed for its onsens. The facility offers indoor and outdoor (rotenburo) baths plus a sauna, with thermal water at a neutral pH of 7.3.
Insider tip — Garameki Onsen in the Agatsuma district of Gunma prefecture — part of Gunma's legendary onsen corridor near Kusatsu, Shima, and Nakanojo. 'Garameki' may refer to the sound of the spring. Gunma is Japan's #1 prefecture for hot springs and this remote onsen offers a quieter alternative to the famous resort towns nearby.