Tsuki-no-yufune

月の湯舟つきのゆぶね

Bathing Complex
Kansai·Hyogo

Day Use

Yes

Bathing & Water

OnsenYes

Uses natural hot spring water

ジェームス山温泉第1号源泉

James-yama Onsen Spring No. 1

Operated by · 塩屋土地株式会社

Sampled at wellhead
Bicarbonate
+ Chloride
Classification

Sodium Bicarbonate-Chloride spring

A sodium-led bicarbonate spring with a salt-tinged finish from a chloride sub-type, classified as a cold-mineral spring drawn at 22.7 °C and heated for bathing. Neutral in pH and soft on the skin, it carries metasilicic and metaboric acid alongside dissolved gas that bubbles up at the wellhead. With around 2,500 mg/kg of dissolved solids it is moderately mineralized, giving the water noticeable body.

pH
6.80
Neutral
Source temperature
22.7°C
Cold mineral
Tonicity
2.30g/kg
Hypotonic
Flow rate
109L/min
Typical
Free CO₂
212mg/kg
Low
Free H₂S
0.10mg/kg
Low
Radon
75Bq/kg
Typical
Color
colorless and clear (faintly yellow 7 hours after sampling)
Taste
a faint metallic note
Odor
odorless
Highlights
  • Cold mineral

Analyzed Jul 24, 2015·株式会社エオネックス·Cert no. 第A1501081号

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SM
Sergey M
1 year ago

337. Tsuki-no-yufune, Kobe Super sento with natural hot spring water for 960, 40-60 minutes from Kobe station. The water might be mixed based on the official website text: they pump natural spring water from 1000 meters deep and also use seawater. Operating hours listed as 09:00-24:00. They stamp the 41 Kansai Super Sento stamp rally 24/25. Has a restaurant, massage, barber shop, Dyson dryer for 100 yen, Kobe merchandise, gift shop, massage chairs, chill zone, and arcade games. Bath photos from the internet, matches reality. 1. Outdoor area. Simple view through a fence of forest, city, and a bridge. 1.1. Square bath, clear and very slightly cloudy water, subtle proper sulfurous onsen smell. Temperature around 40. Based on internet and website photos it might look like an infinity bath, but no matter how hard I tried, the infinity view just didn't work — so noting that there's no infinity view. 1.2. Stone bath, clear and very slightly cloudy water, subtle proper sulfurous onsen smell. Temperature around 39-40. 1.3. Zone to lie down in water. 2. Indoor area. Breathing is tolerable, slight chlorine smell. 2.1. Main bath, clear water, temperature around 40-41. 2.2. Set of seated/standing jet baths. 2.3. Set of reclining jet baths. 2.4. Sauna. 2.5. Cold bath. The building feels cozy inside, the onsen is fairly solid, with mini perks like the Dyson dryer and Kobe merch. Worth considering if you're nearby or passing through.