🇯🇵 Japan · Kusatsu, Agatsuma District, Gunma Prefecture
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✓ Verified on 2026-07-28
Sainokawara Rotenburo is a roughly 500-square-meter open-air bath in Sainokawara Park, about a 10-12 minute walk from Kusatsu's central Yubatake hot spring field, and can hold about one hundred bathers at once. It is fed by the Bandai spring, one of Kusatsu's sources of acidic chloride-sulfate water, with temperature running hottest near the inlet and cooling as it spreads through the pool. The bath is separated by gender, with a mixed-bathing evening (swimwear permitted) held on Fridays.
Phone0278-88-6167
Websiteonsen-kusatsu.com/sainokawara/en/
AddressOaza Kusatsu 521-3, Kusatsu-machi, Agatsuma-gun, Gunma 377-1711, Japan