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Uminohi Onsen

Uminohi, Gunma Prefecture, Japan
Uminohi Onsen
Location
Uminohi, Gunma Prefecture, Japan
Water type
sulfurous
Temperature
44 °C
pH
6.5

Water profile

Thermicity
Sedative
44 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Bio-active
LowHigh

Rich in active gases or metals — a strong mineral character.

Buoyancy
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

SoufreSulfuresSulfates

Uminohi Onsen is located in the greater Maebashi area, Gunma Prefecture, the prefectural capital situated on the Kanto Plain at the foot of Mount Akagi — one of Gunma's three great volcanic mountains alongside Haruna and Myogi — in a city known throughout Japan for its extensive rose cultivation and the designation as Japan's largest rose-producing city, with rose-themed events and gardens throughout the urban area. The siliceous thermal waters here serve Maebashi residents and visitors exploring Gunma's volcanic highland hinterland, providing therapeutic mineral bathing in the administrative and cultural hub of a prefecture renowned throughout Japan for its exceptional concentration of hot spring resources. Bathing at Uminohi Onsen offers a connection to both the urban warmth of Maebashi's civic culture and the volcanic thermal heritage that makes Gunma one of Japan's preeminent hot spring prefectures.

Insider tip — Uminohi Onsen sits in the foothills south of the Akagi volcano in central Gunma, where sulfurous hydrothermal waters emerge with a gentle but persistent mineral scent. The surrounding farmland and orchid-growing greenhouses give the area a pastoral character unusual for a volcanic spa zone. The waters are particularly recommended in spring when cherry trees bloom along the access road, framing the bath facilities in pale pink blossom.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 44 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).