Shin Hatonoyu Onsen
Semboku, Akita, Japan
- Location
- Semboku, Akita, Japan
- Water type
- sodium chloride, thermal
- 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
Shin Hatonoyu Onsen is set in Semboku, Akita Prefecture, a rural area of northern Japan. Sodium-chloride thermal water surfaces at 41°C, feeding an indoor bath, an outdoor rotenburo, and a sauna.
Insider tip — Shin Hatonoyu ('New Pigeon Spring') is in the mountains of Semboku city near Tazawako — Japan's deepest and most impossibly cobalt-blue lake (423 m depth; its unique blue comes from its extraordinary purity and specific algae). The lakeside Tatsuko-zo golden statue (a mermaid goddess transformed by drinking the lake's water to preserve her beauty) is one of Akita's most iconic images. The surrounding forest turns scarlet and gold in late October.
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 & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.