Gekkoen's house spring No. 2 in Arima. A sodium chloride water at roughly 6.5 g/kg total dissolved solids, moderately mineralized with a noticeable salty body and a thin mineral film on the skin after bathing. Weakly acidic at pH 6.4, with a tight, salt-tinged feel.
pH
6.40
Weakly acidic
Source temperature
38.3°C
Warm
Tonicity
6.51g/kg
Hypotonic
Flow rate
31L/min
Low
Free CO₂
400mg/kg
Typical
Analyzed Oct 29, 2018·日本水処理工業株式会社·Cert no. No.188-019
345. Gekkoen Yugetsusanso, Arima Onsen
If you stay overnight at Gekkoen Korokan, you can freely use the onsens at Gekkoen Yugetsusanso. It probably works the other way around too, but better to confirm on the spot.
1. Outdoor bath on the street, off to the side from the internal bridge between Korokan and Yugetsusanso. There's a cool view of the "onsen river" from the bridge. The bath is behind a fence and technically has no view, but it's still great. Cloudy brown water, temperature around 41-42.
2. Baths in the Yugetsusanso hotel itself.
2.1. Indoor bath with clear water, temperature around 40-41. Breathing is fine.
2.2. Small outdoor bath with cloudy brown water, temperature around 39-40.
Considering the total number and level of baths, it's recommended to book accommodation to get access to onsens via the Korokan + Yugetsusanso combo. Very strong.