Iwaki Onsen Minato no Yu
Yurihonjo, Akita, Japan
- Location
- Yurihonjo, Akita, Japan
- Water type
- sodium chloride, thermal
- Temperature
- 40 °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
Iwaki Onsen Minato no Yu is located in Yurihonjo, Akita Prefecture, near the coast. Its sodium-chloride thermal water is kept around 40°C (pH 7.3), with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Iwaki Minato (harbor) was historically Yurihonjō's fishing port on the Sea of Japan — 'Minato no Yu' (Harbor Bath) directly celebrates this maritime identity. The port once shipped Akita cedar lumber, rice, and copper across the Sea of Japan to Osaka and beyond. Today the coastline hosts wind turbines of one of Japan's largest offshore wind projects. Chokai-san's perfect volcanic cone rises inland above the flat coastal plain; the morning light on the volcano from the harbor is one of Akita's most iconic views.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 40 °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.