Onsen OniOnsen Oni

Tansan Hot Spring Source

炭酸泉源

Other
Arima Onsen
Kansai·Hyogo
you.co.jp

Day Use

Yes

Bathing & Water

Outdoor BathNo

Open-air outdoor bath

Indoor BathNo

Enclosed indoor bathing area

SaunaNo

Dry heat sauna room

Cold BathNo

Cold water plunge bath, typically used after sauna

OnsenYes

Uses natural hot spring water

Capabilities

Private BathNo

Private bath available for day-use visitors or hotel guests to reserve

Room OnsenNo

Private onsen bath in guest rooms, for overnight guests only

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

TattooNo

Allows entry with visible tattoos

KidsNo

Welcomes children and families

DiningNo

Restaurant or dining open to visitors (not just hotel meal plans)

WashingNo

Shower, wash stations, soap and shampoo provided

TowelsNo

Towels available to rent or borrow

Rest AreaNo

Relaxation space for after bathing

ParkingNo

On-site or nearby parking available

炭酸泉源

Tansan-sengen
炭
Carbonated
+ Iron-bearing
Cold mineral source · 18°CCold mineral
Known good for
  • Circulationtired legs
  • Recoveryfatigue, stress

A carbonated cold-mineral spring carrying free carbon dioxide along with iron. At a source temperature of roughly 18 °C it falls below the 25 °C cold-mineral threshold and is reheated for bathing. The signboard notes that people once mixed sugar into this carbonated water to drink it as soda, and that the source gave its name to the local 'tansan senbei' crackers.

Explore the water

Highlights

Drinking Spring

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AN
Andrey Novikov
1 month ago

A tap with drinkable onsen water in the park on the outskirts of Arima. The water is cool, slightly carbonated, with a light sulfur taste, somewhat reminiscent of either Borjomi or some Essentuki (haven't drunk either for a long time, so I don't really remember). This park will be almost the first thing to greet you in Arima if you come on foot, descending the hiking trail from Mount Rokko. If you arrive by ropeway, you'll have to make a small detour on the way to the center. Photos are from the internet and correspond to the description. 2026.05.16