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Kamiobo

上大坊かみおおぼう

Lodging
Kansai·Hyogo

Day Use

Yes
15:00–18:00
¥1,000

Bathing & Water

Natural onsen water

Uses natural hot spring water

Indoor BathYes

Enclosed indoor bathing area

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

天神泉源

Tenjin Spring
Chloride
+ Iron-bearing
Color
very faintly greenish, dark brown, salty with almost no odor, with vigorous gas bubbling
Taste
salty
Odor
almost odorless

Sodium Chloride spring

pH 6.6NeutralHot source · 99°CStrong saltIron-richHigh silica
Composition fingerprint36.1 g/kg dissolved · Hypertonic
Na⁺76
Ca²⁺14
Cl⁻99
CationsAnions
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Chloride Cl⁻
table-salt anion — coats the skin and holds heat in.
Known good for
  • Warmingcold sensitivity
  • Aches & jointsstiff shoulders
  • Smooth skindry, rough skin

A sodium-led iron-rich chloride spring classified as a strong-salt source, exceeding ocean salinity at 36.09 g/kg dissolved solids. It is rich in iron and oxidizes to a reddish-brown — the classic 'golden water' (kinsen) character of this district — leaving a thick mineral coating on the skin after bathing. Neutral pH and a generous 121 mg/kg of metasilicic acid round out a heavily mineralized water with real body.

Sampled at mixing tank·Analyzed Sep 24, 2019·公益社団法人 中央温泉研究所·Cert no. 甲第3734号

Explore the water

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4.0

1 review

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Sergey M
1 year ago· edited

343. Kamiobo, Arima Onsen ★★ I went for a day visit for 1000 yen (listed as 15:00 to 18:00). They give you a towel, and you can drink water from the cooler by the changing room entrance. It’s on one of Arima’s main shopping streets. A ryokan with an old-school, grandfatherly horror onsen. You have to go down the stairs to the bath area in the basement. It’s as atmospheric and authentic as it gets, like something out of a horror movie such as The Texas Chain Saw Massacre. The air inside is comfortable. There are two baths, one with clear water (38.5 degrees) and one with cloudy brown water (45 degrees). There is a shower, and body wash and shampoo are provided. A really cool, atmospheric place in the center of Arima Onsen. From the outside, you would never guess that this ryokan even offers day visits, let alone one with such an old-school onsen. You are literally on a shopping street full of tourists, and a few minutes later you are in an atmospheric, secluded onsen in the basement. Highly recommended if you are not put off by the old-school vibe. 05.01.2025

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Last updated August 2, 2026