What is the water temperature at Tsubame Onsen?

The water temperature at Tsubame Onsen is 43–43°C.

Is Tsubame Onsen free to enter?

Yes, Tsubame Onsen has free entry.

Are tattoos allowed at Tsubame Onsen?

Yes, tattoos are welcome at Tsubame Onsen.

How do I get to Tsubame Onsen by train?

The nearest train station to Tsubame Onsen is 燕温泉, approximately 0 km away.

Mixed · Outdoor · Free

Tsubame Onsen

燕温泉

43°CMixed BathingOutdoorsulfursulfateNatural PoolFree entry

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43–43°CWater temp

2.0pH

FreeEntry fee

MixedBathing type

—Opening hours

About this spring

Nestled in the heart of Tsubame, Japan, Tsubame Onsen offers a serene escape into nature's embrace. Known for its rich mineral content, the hot spring provides therapeutic benefits that have been cherished by visitors for generations. Surrounded by lush greenery and tranquil landscapes, this onsen invites guests to unwind and rejuvenate amidst its picturesque setting. Whether you're seeking relaxation or cultural immersion, Tsubame Onsen promises a memorable experience steeped in tradition and natural beauty.

Data: Wikipedia (CC BY-SA 4.0) · OpenStreetMap (ODbL)

Highlights

Therapeutic mineral-rich waters
Scenic natural surroundings
Traditional Japanese onsen experience
Opportunities for local cultural immersion
Proximity to Tsubame's renowned metalworking industry

Suitability

Tattoo policy

Welcome

Children policy

Family-friendly

pH note

Highly acidic (pH 2.0)

Altitude

1,100m

Mineral chemistry

Sulfur

Benefits

Sulfuric hot springs are among the most studied in Japanese balneology. The sulfur compounds — primarily hydrogen sulfide and thiosulfate — have documented antimicrobial and anti-inflammatory properties. Regular bathing is associated with relief from chronic skin conditions including eczema and psoriasis, as well as joint inflammation and muscle soreness. Sulfuric waters have been prescribed in Japanese medical practice since the Edo period.

Note

The distinctive rotten-egg smell dissipates quickly after leaving the bath. Avoid if you have a sulfur allergy, very sensitive skin, or respiratory conditions. Remove silver jewellery before entering — sulfur will blacken it permanently.

Sulfate

Benefits

Sulfate springs (硫酸塩泉) contain dissolved calcium, sodium, or magnesium sulfate and are among the most therapeutically versatile spring types. Calcium sulfate springs are traditionally associated with wound healing and post-surgical recovery — the calcium ions support tissue repair and the sulfate has mild astringent properties. Sodium sulfate springs are linked to liver and digestive function; they are one of the few spring types used in Japan's national spa therapy clinics for chronic digestive complaints. The water typically has a clean, slightly bitter mineral taste.

Note

Sulfate springs are generally well-tolerated. Those with kidney stones of the calcium oxalate type should consult a doctor before bathing regularly. Sodium sulfate springs can have a mild laxative effect in sensitive individuals — stay hydrated.

History

Tsubame Onsen sits at approximately 1,100 metres above sea level on the southern flank of Mount Myoko in Niigata Prefecture, making it the highest-altitude hot spring village in the Myoko Kogen area.

Tradition holds that the springs were discovered by Kobo Daishi — the ninth-century monk and founder of Shingon Buddhism, whose name is attached to countless sacred discoveries across Japan — lending the site a spiritual patina that endured through the medieval and Edo periods. Natural hot water had long bubbled up among the rocks near Sotaki Waterfall, a cascade subsequently listed among Japan's Top 100 Waterfalls, but organised resort development began in earnest in 1875, the eighth year of the Meiji era, when the springs were opened to the public on a commercial basis. The name Tsubame, meaning swallow, was given to the hot spring in memory of the flocks of rock swallows that once flew through the mountain gorge, their darting flight becoming part of the onsen's defining imagery. The milky-white waters, coloured by their high concentration of sulfur, bicarbonate, and sulfate minerals, earned a reputation as a triple beauty bath with particular efficacy for rheumatism, neuralgia, and skin conditions — qualities that drew both mountain pilgrims and health-seeking travellers through the Meiji and Taisho eras. Today Tsubame Onsen preserves two freely accessible communal open-air baths, Ogon-no-Yu and Kawara-no-Yu, maintained by the community as a continuation of the inclusive bathing culture that characterised the resort from its earliest years.

Local guide

The road into Tsubame Onsen starts at Myoko Kogen and climbs steadily through cedar forest until the valley narrows and the air changes. At around 1,100 meters above sea level, you reach a cluster of wooden inns huddled against the slope, and the faint smell of sulfur starts drifting through your car window. This is the highest hot spring village in Niigata Prefecture, sitting right at the trailhead for Mount Myoko, and its two free outdoor baths are a fifteen-minute walk further up through the trees from the last inn.

The outdoor baths here, Kawara-no-yu and Ougon-no-yu, sit right on a rocky streambed where the mountain meets a small rushing creek. Both are free to use and maintained entirely by the local community with no staff, no entrance booth, and no formal hours. The water flowing into the pools is naturally milky white from its high sulfur and sulfate content. It smells sharp and clean, not like rotten eggs but like struck flint, and when you step in at 43 degrees the heat is immediately deep and penetrating. Kawara-no-yu is a mixed-gender konyoku bath, which surprises some visitors, but the milky opacity of the water gives everyone enough privacy to be comfortable.

The setting is remarkable. You are sitting in a stone hollow in an actual mountain forest, not a garden designed to look like one. Tall conifers press in from three sides. The creek runs over the rocks below you, loud enough to fill the silence. In winter, the snow loads the branches and the contrast between the pale white water and the dark wet stone is something you do not forget quickly. There are no showers, no lockers, and no vending machines. You change in a small wooden hut and walk out in your towel.

Tsubame also has a quality that almost no other major onsen in Japan shares: a formal welcome for tattooed visitors at both the outdoor baths and the indoor facilities. For people who have spent years researching onsen only to be turned away at the door, this alone makes the trip worthwhile. The sulfur in the water is said to be good for skin and joints, and locals who have used these baths for generations certainly seem convinced. If you are willing to take the mountain road and walk the last stretch on foot, what you find at the top is completely genuine.

How this spring compares

pH level

2.0

More alkaline than4% of Japan springs

More acidic than94% of Japan springs

Japan median7.3

Japan range1.2–11.3

n=121 springs

Max temperature

43°C

Hotter than11% of Japan springs

Japan median60°C

Japan hottest105°C

n=122 springs

Similar springs

Myoban Yunosato Onsen

Beppu

sulfuracidic

pH 2.290°C

Getting there

Take the Hokuriku Shinkansen from Tokyo to Joetsu-Myoko Station (~2 hours), then transfer to the Echigo Tokimeki Railway Myoko Haneuma Line and alight at Sekiyama Station (~15 min). From Sekiyama, board the local bus to Tsubame Onsen (~30 min). Note that bus service operates on weekdays only, the road closes in winter, and the two free outdoor wild baths are accessible from late April through November.