Hotel Green Plaza Hakone

Baths at this ryokan

• Rooms with private open-air bath

• Private bath checked Nov 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 (rlx.jp)

Analysed hot springs in Hakone

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.

• Yoshiike RyokanSee the spring data ›Spring type: Sodium-Calcium Chloride Hot Spring / pH 8.1 / Free-flowing from the source, with no added water, heating or recirculation
• Kiritani HakonesoSee the spring data ›Spring type: Acidic Calcium Sulfate and Chloride Hot Spring / pH 2.1 / Free-flowing from the source, with no added water, heating or recirculation
• Tonosawa Onsen Motoyu KansuiroSee the spring data ›Spring type: Alkaline Simple Hot Spring / pH 8.8 / Free-flowing from the source, with no added water, heating or recirculation
• Hakone Yumoto Onsen Hakone SuimeisoSee the spring data ›Spring type: Alkaline Simple Hot Spring / pH 8.5 / Free-flowing from the source, with no added water, heating or recirculation
• Sengokuhara Onsen SenkyoroSee the spring data ›Spring type: Acidic Calcium Sulfate and Chloride Hot Spring / pH 2.1 / Free-flowing from the source, with no added water, heating or recirculation

Spring type

Chloride spring (weakly alkaline, pH 8.2, hypotonic, high temperature)per the listing

塩化物泉・弱アルカリ性（ph8.2）・低張性高温泉

Source: ikyu.com