Okayama · Yubara Onsen
Yubara Onsen Sunayu
湯原温泉 砂湯
A natural open-air bath on the Asahi River gravel bed right below Yubara Dam, where water bubbles up through the riverbed itself — ranked the 'western grand champion' of Japan's rotenburo. Three pools at different temperatures; mixed, free and open 24 hours. Only a simple changing hut, so women are advised to wear a bathing garment (sold and rented in town). Closed Wednesday mornings for cleaning. Photography strictly forbidden.
- Price (adult)
- Donation / free
- Hours
- 24 hours
- Closed
- Wed mornings (cleaning)
- Access
- 35 min by bus from JR Chugoku-Katsuyama Station to Yubara Onsen, then 5 min walk
- Water type
- Alkaline simple
- Tattoos
- Ask ahead
- Phone
- 0867-62-2526
- Official site
- yubara.com ↗
- Open in Google Maps
- Google Maps ↗
Essentials
Stay in this onsen town
Compare and book stays in Yubara Onsen. Day bathing itself needs no booking.
Opens partner booking site (affiliate)
Why go
- Free, 24h, spring under your feet
- Japan's 'western champion' rotenburo
- Mixed — bathing garment advised
Before you go
- No official tattoo policy is published — ask at reception.
- As a communal bath there is no soap or shampoo — bring your own or buy at the shop.
- Last entry is 30–60 minutes before closing.
Features
Convenience
Price
Mood & scenery
Rules & private
Amenities
✔ Verified operating: 2026-09 真庭観光WEB（真庭観光局公式）
Prices and hours change. Check official sources before visiting.
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