Kusatsu Onsen Yuyado Iwafuji

Baths at this ryokan

• Rooms with private open-air bath

• Private bath checked Oct 2026

We only show items we could confirm on the property's official site or its page on a booking site. Source: in-room bath (travel.rakuten.co.jp)

Analysed hot springs in Kusatsu

We don't have the analysis report for this ryokan's spring yet. Here are ryokan in the same area whose report is on file: spring type, pH and how the water is used.

• NarayaSee the spring data ›Spring type: Acidic Sulfur-containing Aluminum Sulfate and Chloride Hot Spring (hydrogen sulfide type; Hypotonic Acidic high-temperature hot spring) / pH 2 / Free-flowing from the source, with no added water, heating or recirculation
• Kusatsu Now Resort HotelSee the spring data ›Spring type: Acidic Hydrogen Sulfate and Chloride Hot Spring (Hypotonic Acidic high-temperature hot spring) / pH 1.75
• Libmax Resort Kusatsu OnsenSee the spring data ›Spring type: Acidic Hydrogen Sulfate and Chloride Hot Spring (Hypotonic Acidic high-temperature hot spring) / pH 1.75 / Free-flowing from the source, with no added water, heating or recirculation
• SensuikanSee the spring data ›Spring type: Acidic Sulfur-containing Aluminum Sulfate and Chloride Hot Spring (hydrogen sulfide type) / pH 2.2 / Free-flowing from the source, with no added water, heating or recirculation
• Uribou RyokanSee the spring data ›Spring type: Acidic Sulfur-containing Aluminum Sulfate and Chloride Hot Spring (hydrogen sulfide type) / pH 2