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Iwanuma Onsen Miyagi

Iwanuma, Miyagi, Japan
Iwanuma Onsen Miyagi
Location
Iwanuma, Miyagi, Japan
Water type
sodium chloride
Temperature
40 °C
pH
7.3

Water profile

Thermicity
Sedative
40 °C
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

Iwanuma, a city on the Miyagi Prefecture coast south of Sendai, is noted for its strawberry farms and the Takedera Temple associated with the ancient Oku no Hosomichi travel diary of haiku master Matsuo Bashō, who passed through this Tohoku landscape in 1689. Iwanuma Onsen Miyagi provides chloride-rich thermal baths drawing on the geothermal resources of the Miyagi coastal plain, offering warm relaxation in an area that has seen remarkable regeneration following the 2011 Great East Japan Earthquake and tsunami. The Iwanuma area is also celebrated for its scenic coastal pine forest along Sendai Bay, a landscape long honoured in Japanese poetry and painting.

Insider tip — Iwanuma Onsen sits in the flat coastal lowlands south of Sendai where rivers meet the Pacific, its sodium-chloride waters sourced from deep sedimentary layers beneath the Sendai plain. The city is locally famous for its wisteria trellis at Takekoma Shrine and is a logical stop between Sendai and Shiroishi. The baths cater overwhelmingly to local residents, offering an authentic Tohoku neighbourhood onsen experience at neighbourhood prices.
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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 water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).