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Nagaoka Yomogihira

Yomogihira, Nagaoka, Niigata (Chubu), Japan
Nagaoka Yomogihira
Location
Yomogihira, Nagaoka, Niigata (Chubu), Japan
Water type
bicarbonate
Temperature
40 °C
pH
8

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
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

BicarbonatesSodiumCalcium

Nagaoka Yomogihira lies in a traditional mountain hot spring area in the highlands east of Nagaoka, where the Yomogihira River valley provides access to a quiet spa community surrounded by the beech and cedar forests of the Echigo Mountains — a landscape that changes from the profound snowfall of winter, when the valley can accumulate meters of snow that tests the architecture and resilience of its traditional mountain inns, to the brilliant summer greenery and autumn foliage that draw visitors seeking respite from the heat and humidity of the Niigata plain below. The mountain character of Yomogihira contrasts with the urban energy of the Nagaoka plain visible far below, and the traditional inn atmosphere of this small spa settlement preserves the characteristics of a genuine Japanese mountain onsen village where the scale remains intimate and the relationship between guest and host reflects centuries of mountain hospitality culture. The onsen's siliceous mineral waters, rising through the metamorphic and sedimentary geology of the Echigo Mountains, provide warm therapeutic bathing in a snow-country mountain spa of the quietest and most authentic character.

Insider tip — Nagaoka Yomogihira Onsen nestles in a forested valley just west of Nagaoka city, where the mountains begin their descent toward the coastal plain. Bicarbonate waters here have a particularly clear, colorless quality, known locally for bringing lightness and relaxation after mountain trekking. The name Yomogihira references the mugwort (yomogi) plants that carpet the valley floors in spring, adding a herbal dimension to the forested landscape. Small family-run minshuku guesthouses cluster around the spring for a deeply personal ryokan experience.
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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 bicarbonate water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).