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GROUND ROCK CASTLE sauna（グランドロックキャッスルサウナ）
HONMONO Score 74 — ranked 17 of 1,706 open facilities in Japan. Strongest categories: water bath 15, cleanliness 13. Google rating 4.7.
Figures read from our database 2026-09-24 03:43 JST — rankings and counts are calculated at this moment, not stored.
Facility info fetched from Google Maps 2026-07-30 / Source: publicly available Google Maps listings. The HONMONO Score is calculated by this site from that data.
日本、〒669-3128 兵庫県丹波市山南町金屋１０２３−１
HONMONO Score
74
/ 100
Our own weighting, not an industry standard. See the full formula and distribution →
About this facility
GROUND ROCK CASTLE sauna is a dedicated sauna facility in Tamba, Hyogo Prefecture. Its wood-fired barrel sauna runs at 90–120°C, letting you set the heat to your liking, and you can enjoy self-loyly (pouring water on the hot stones) scented with white birch. A natural cold plunge fed by groundwater sits at 13–15°C, followed by outdoor cooling on infinity chairs lined up facing a pond. On request, a sauna master will personally coach you on how to reach "totonou," the deeply relaxed post-sauna state. Sauna hats and towels are provided, so you can come empty-handed, and afterward you can enjoy sauna-style meals at the restaurant.
Generated by AI from 5 review texts from Google Maps (fetched 2026-07-30) and the official website. Google Maps returns at most 5 reviews per facility, chosen by relevance, so the sample may lean positive. We do not hold the total number of Google reviews for this facility. The summary is written as an introduction and does not list drawbacks.
Is this place the real deal?
How to get there
Open in Google MapsFacility information
- Phone
- 080-4208-1946
- Website
- https://grc.dog/totonou
- Google rating
- ⭐ 4.7
- Hours
- Check on Google Maps
Health effects of sauna (research evidence)
These are peer-reviewed studies on sauna bathing in general. They are not measurements of this facility, and they are not medical advice.
❤️Cardiovascular
Sauna habits and reduced risk of heart disease, stroke, and sudden death
Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events
Laukkanen T, Khan H, Zaccardi F, Laukkanen JA · JAMA Internal Medicine · 2015
フィンランド人男性2,315人を20年間追跡。週4-7回サウナを利用する群は週1回群と比較して心血管死亡リスクが50%低下、全死因死亡リスクも40%低下。
Sauna bathing is associated with reduced cardiovascular mortality and improves risk prediction in men and women
Laukkanen JA, Laukkanen T, Kunutsor SK · BMC Medicine · 2018
男女1,688人の15年追跡コホート。サウナの頻度・時間と心血管死亡率の逆相関を確認。
🧠Mental health
Effects on dementia, depressive symptoms, and stress resilience
Sauna bathing is inversely associated with dementia and Alzheimer's disease in middle-aged Finnish men
Laukkanen T, Kunutsor S, Kauhanen J, Laukkanen JA · Age and Ageing · 2017
週4-7回のサウナ習慣で認知症リスクが66%、アルツハイマー病リスクが65%低下。
Whole-Body Hyperthermia for the Treatment of Major Depressive Disorder: A Randomized Clinical Trial
Janssen CW, Lowry CA, Mehl MR, et al. · JAMA Psychiatry · 2016
うつ病患者を対象にした無作為化試験。1回のwhole-body hyperthermia(温熱療法)で6週間持続するうつ症状の有意な改善を確認。
🛡️Immunity & inflammation
Immune activation and suppression of chronic inflammation
Cardiovascular and other health benefits of sauna bathing: A review of the evidence
Laukkanen JA, Laukkanen T, Kunutsor SK · Mayo Clinic Proceedings · 2018
サウナの抗炎症作用・血管内皮機能改善・酸化ストレス低減を包括的にレビュー。
Effects of sauna bathing on stress-related genes expression in athletes and non-athletes
Pilch W, Pokora I, Szyguła Z, et al. · Annals of Agricultural and Environmental Medicine · 2013
サウナによるヒートショックタンパク質(HSP72)の発現上昇を確認。免疫応答とストレス耐性の向上を示唆。
😴Sleep & recovery
Improved sleep quality and post-exercise recovery
Health benefits and risks of sauna bathing in patients with cardiovascular disease
Hannuksela ML, Ellahham S · American Journal of Medicine · 2001
サウナ後の副交感神経活性化と睡眠の質向上を報告。リラクゼーション効果のメカニズムを解説。
Post-exercise sauna bathing improves recovery from endurance exercise
Scoon GS, Hopkins WG, Mayhew S, Cotter JD · Journal of Science and Medicine in Sport · 2007
持久系アスリートを対象に、運動後サウナで血漿量増加と持久パフォーマンス向上(平均32%)を確認。
Reviews
No reviews yet
HONMONO Score
74
/ 100
Our own weighting, not an industry standard. See the full formula and distribution →