Kusatsu’s onsens are overflowing with some of Japan’s best hot spring waters. Kusatsu Onsen has 7 water sources and among these, Sai-no-Kawara’s waters are the most prized among the springs here. As a result, only long-standing hotels are allowed to pull water from Sai-no-Kawara, and Kusatsu Hotel is one of 6 hotels that are privileged with this ability.
Many years ago, a renowned German medical researcher claimed these waters had healing properties and that the waters themselves are gentle on the skin. For everyone to enjoy our hot springs, every day at 22:00 the hot springs switch gender admittance.
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