Ryujin-onsen Shimogoten

龍神温泉 下御殿りゅうじんおんせん しもごてん

Other
Kansai·Wakayama

Day Use

Yes

Bathing & Water

OnsenYes

Uses natural hot spring water

Capabilities

Mixed BathingYes

Shared bathing area for all genders

龍神温泉 下の湯

Ryujin Onsen Shimo-no-yu

Operated by · 龍神温泉協会

Sampled at wellhead
Bicarbonate
Classification

Sodium Bicarbonate spring

A sodium-led bicarbonate hot spring in the classic jūsō-sen (soda-water) style. The water emerges at 46 °C, weakly alkaline (pH 7.8) and soft on the skin, sitting squarely in Japan's beauty-water family. A generous 65 mg/kg of metasilicic acid adds a thin silica film that leaves skin noticeably smoother afterwards.

pH
7.80
Weakly alkaline
Source temperature
46.0°C
Hot
Tonicity
1.39g/kg
Hypotonic
Flow rate
68L/min
Typical
Free CO₂
0.10mg/kg
Low
Free H₂S
0.10mg/kg
Low
Color
colorless and transparent
Taste
tasteless
Odor
odorless
Highlights
  • High silica

Analyzed Jun 16, 2008·和歌山県環境衛生研究センター·Cert no. 温泉第909号

Programs

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SM
Sergey M
4 months ago

669. Ryujin-onsen Shimogoten, Ryujin Onsen, Wakayama ★★ Visited for higaeri for 1300. Higaeri hours are 12:00-14:30. They sell the Wakayama 12 Onsen stamp book. Small outdoor mixed bath in stone. Great view of the river, forest, and bridge. Hawks may fly close to the bath - on my second visit, one was sitting on a tree opposite the bath almost the entire time. They provide a large towel as bathing attire, but don't really insist - in practice visitors decide for themselves. Clear water, temperature around 43. Indoor bath. Clear water, temperature around 41.5. A bit stuffy inside. Really great onsen in terms of views and vibes, plus it's konyoku. Recommended for a visit. 08.11.2025 09.11.2025