Aka Biru Onsen
Hiroshima, Hiroshima, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Hiroshima, Hiroshima, Japan
- Water type
- sodium chloride
- Temperature
- 41 °C
- pH
- 7.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Aka Biru Onsen is a hot spring located in Hiroshima, Japan. Its sodium-chloride water reaches around 41°C, with an indoor bath, an outdoor bath (rotenburo) and a sauna on site.
Insider tip — Aka Biru Onsen — named for the red-brick building it occupies — is a standout urban sento in Hiroshima drawing sodium-chloride thermal water from the Chugoku mountain aquifer. The saline waters are exceptionally warming, a trait locals rely on during the damp Seto Inland Sea winters. The retro architecture of the bathhouse has become a neighborhood landmark, drawing as much attention for its facade as for its waters. Enter through the traditional noren curtain and prepare to melt.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 41 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).