Ongagawa Onsen
遠賀川温泉 おんがの赤湯おんががわおんせん おんがのあかゆ
Day Use
YesAdults ¥800, children ¥500, under 3 ¥400. Year-end (12/28–1/3) and Golden Week: ¥1,000. Weekends/holidays open from 10:00.
Bathing & Water
Open-air outdoor bath
Enclosed indoor bathing area
Dry heat sauna room
Mist sauna (steam sauna). Reviews note it is sometimes not operating.
Uses natural hot spring water
Capabilities
Shared bathing area for all genders
Policies & Services
Shower, wash stations, soap and shampoo provided
On-site or nearby parking available
Highlights
Steam SaunaPrograms
About
The indoor bath at Onga no Akayu (おんがの赤湯) is the draw: the water runs a deep reddish-brown from iron, dark enough that you can't see the bottom. The outdoor bath has the iron filtered out, so it comes up clear and runs a little cooler, a useful change after the hot indoor soak. There's also a mist sauna, though it isn't always running. The place is small and family-run, with rice fields out front. It's part of the Kyushu Onsen-do (九州温泉道) 88-bath stamp circuit, and it came close to closing in 2023 before the owner's son stepped in to keep it going.
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Last updated June 25, 2026