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Senomoto Kogen Hotel

Water profile

Senomoto Kogen Hotel

Spring chemistry and what it does, with the research behind it.

Simple

A simple thermal spring at Senomoto — neutral in pH and lightly mineralized on paper, but the sensory row of the certificate tells a more textured story: a faintly yellow-brown, clear water carrying a whisper of hydrogen sulfide and a metallic edge on the tongue. The wellhead delivers 41.7 °C at a steady 173 L/min.

Good for

Recovery

Warmth and buoyancy lower stress markers and improve sleep; habitual bathing is linked to lower rates of depression.

fatigue, stress

Take care

Contraindications
  • 病気の活動期(特に熱のあるとき)
  • 活動性の結核、進行した悪性腫瘍又は高度の貧血などの身体衰弱の著しい場合
  • 少し動くと息切れがするような重い心臓または肺の病気
  • 消化管出血、目に見える出血がある場合
  • 慢性の病気の急性増悪期

Measured at the source

Source temperature
41.7°C
Warm
Tonicity
Hypotonic
Flow rate
173L/min
Typical
Radon
14Bq/kg
Low

On the certificate

  • 筋肉若しくは関節の慢性的な痛み又はこわばり(関節リウマチ、変形性関節症、腰痛症、神経痛、五十肩、打撲、捻挫等の慢性期)
  • Muscle stiffness associated with motor paralysis
  • 冷え性、末梢循環障害
  • 胃腸機能の低下(胃のもたれ、腸内ガスがたまる等)
  • Mild hypertension
  • Impaired glucose tolerance (diabetes)
  • Mild hypercholesterolemia
  • Mild asthma or emphysema
  • Hemorrhoid pain
  • 自律神経不安定症、ストレスによる諸症状(睡眠障害、うつ状態等)
  • 病後回復期、疲労回復、健康増進
  • 泉質別適応症: 自律神経不安症、不眠症、うつ状態

Evidence

  1. Maeda M. 温泉の医学的効果とその科学的根拠. J. Hot Spring Science 70:197–207, 2021.
  2. Takeda M et al. Hot spring bathing practices have a positive effect on mental health in Japan. Heliyon 9(9):e19631, 2023.

Educational, not medical advice. If you have a health condition, consult a physician before onsen therapy.