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Depression & Low Mood | Onsen Bathing as Complementary Therapy

Published May 6, 2026·1min read

Depressive states carry a general bathing indication across all 10 Japanese spring types. Simple springs, chloride springs, and sulfate springs additionally hold specific type indications for depression. Thermal, buoyancy, and hydrostatic effects shift the nervous system toward parasympathetic dominance. Consult a psychiatrist before starting if taking antidepressants.

Depression & Low Mood | Onsen Bathing as Complementary Therapy
Applicable spring types
10 types
Analysis records
368 records
Table of Contents
  1. Spring types indicated for depression
  2. How onsen bathing is thought to affect depression
  3. Bathing tips for depressive symptoms

Spring types indicated for depression

Depressive states are covered by the general bathing indication for all 10 spring types, and simple, chloride, and sulfate springs additionally hold specific type indications.

high pH and gentle on skin — indicated for autonomic instability and depressive states

the salt film prolongs warmth, sustaining relaxation

also taken by drinking; studied for direct neurological effects

See the full 10-spring-type guide

How onsen bathing is thought to affect depression

Onsen bathing temporarily raises core body temperature; the subsequent drop is thought to promote melatonin secretion and ease sleep. Buoyancy and hydrostatic pressure are thought to release muscular tension. Simple springs (high pH, gentle on skin) are the mildest choice for sensitive individuals. Chloride springs provide prolonged warmth via the salt film; sulfate springs are studied for direct neurological effects.

Filter on the map & mineral viewer

Filter by the relevant spring types and find onsen you like from the map or list. Compare analysis details with the mineral viewer.

Find onsen by these spring types

Bathing tips for depressive symptoms

  1. Soak gently for 10–15 minutes in a lukewarm 38–40°C bath to favour parasympathetic activation
  2. Bathe 1–2 hours before bed so the drop in core temperature smooths the transition to sleep
  3. A short morning bath resets the body clock and steadies daily rhythm
  4. Make onsen visits a sustainable habit — combining a change of scene with light exercise

Related Onsen Facilities

40 matches
Kuronagi Onsen Simple Spring
Simple SpringInfo pending
Kuronagi Onsen
黒薙温泉
Toyama Unazukimachi, Kurobe City· 黒薙温泉
The Great Source of Kurobe Gorge

Kuronagi Onsen, a major source gushing from the Kuronagi River, a tributary of the Kurobe River, was discovered in 1645 by Tarozaemon of Otozawa Village. During the Edo period, it was renowned as a hidden hot spring of the Kaga Domain. Its colorless, transparent, and soft waters gently envelop the skin, warming the body to its core. After bathing, you feel surprisingly light, with a sense of rejuvenation from within. This blessed spring, whose waters are also delivered to Unazuki Onsen about 7 kilometers away, offers solace to those seeking to liberate mind and body amidst grand nature and rediscover their true self.

Onsen RyokanDay-use Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
TEMP98.3℃
0℃50℃100℃
KEY MINERALS
8.2 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

A trace component with gentle antibacterial and anti-inflammatory action.

A natural moisturizer that leaves a hydrated feel on the skin.

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Okamoto-ya Ryokan Acidic Spring
Acidic SpringSulphur SpringSimple SpringInfo pending
Okamoto-ya Ryokan
岡本屋旅館
Oita Beppu· 岡本屋旅館
Milky Blue Waters of Myoban

Myoban Onsen prospered in the Edo period through alum production and still keeps rows of thatched huts where yunohana sulfur flowers are made. Here the Okamotoya Ryokan source gushes naturally at 74.4°C in Myoban 3-kumi; colorless as it emerges, it turns a milky, bluish white once it meets the air in the bath. Its acidity gently loosens old skin cells, leaving a soft, light feeling afterward, and it suits anyone who wishes to steep in dense sulfur water amid mountain steam.

Onsen RyokanPrivate Rental BathTattoo OK (public bath)
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Acidic2.6
0714
TEMP74.4℃
0℃50℃100℃
KEY MINERALS

The source of the distinctive sulfur smell. Dilates blood vessels via skin and inhalation to strongly boost circulation.

4.3 mg/kg

Tightens the skin and balances sebum.

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

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Akarinoyado Tougetsu Simple Spring
Simple SpringVerified
Akarinoyado Tougetsu
灯りの宿 燈月
Oita Beppu· 灯りの宿 燈月Kannawa Onsen
The Lantern Light Spring of Serenity

Gushing in the Kannawa Onsen area, one of the eight springs of Beppu, Japan's top onsen destination, the Akari no Yado Tougetsu Gensen is a relatively new source, drilled and pump-lifted for a facility that opened in 2019. It offers modern relaxation while inheriting the traditions of Kannawa, long-famed as a therapeutic spa area. With a neutral pH of 6.8, close to human skin, the water is gentle and suitable for everyone. Immersing yourself in these waters helps you forget the hustle and bustle of daily life, deeply relaxing both mind and body.

Onsen RyokanPrivate Rental Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral6.9
0714
TEMP68.8℃
0℃50℃100℃
KEY MINERALS

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

59.9 mg/kg

Softens dead skin cells for a silky bathing feel.

97.2 mg/kg

Soothes the skin and gently improves circulation.

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Yufuinonsen Yufuinsansuikan Simple Spring
Simple SpringVerified
Yufuinonsen Yufuinsansuikan
ゆふいん山水館
Oita Yufu· ゆふいん山水館 あさぎりの湯Yufuin Onsen
The Silky Skin Spring of the Morning Mist

As its name "Asagiri no Yu" (Morning Mist Bath) suggests, this source gushes forth in a location overlooking the Yufuin Basin's magical morning mist. It is a private source nurtured by one of Yufuin's most historic establishments, founded in 1911. The alkaline simple spring is gentle on the skin. Its abundant metasilicic acid helps to wash away old skin cells, leaving your skin feeling silky smooth. It is a renowned spring perfect for days when you wish to quietly reset your mind and body at the foot of Mt. Yufu.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline8.5
0714
TEMP64℃
0℃50℃100℃
KEY MINERALS

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

Softens dead skin cells for a silky bathing feel.

A trace component with gentle antibacterial and anti-inflammatory action.

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Onsen Hotel Boston Simple Spring
Simple SpringInfo pending
Onsen Hotel Boston
温泉ホテル ボストン
Hokkaido Obihiro· 道東温泉ホテル湯源苑
Silky Downtown Moor Spring

Struck in the 1980s from a deep well in downtown Obihiro, this spring carries plant-derived humic matter from beneath the Tokachi Plain. Its pale-brown water clings to the skin in fine bubbles within seconds, with a slick, almost webbed-hand smoothness typical of Tokachi's moor springs.

Onsen RyokanTattoo OK (public bath)
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Alkaline9.01
0714
TEMP43.5℃
0℃50℃100℃
KEY MINERALS

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

A trace component with gentle antibacterial and anti-inflammatory action.

Softens dead skin cells for a silky bathing feel.

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Unazukionsen Entaijisou Simple Spring
Simple SpringInfo pending
Unazukionsen Entaijisou
宇奈月温泉 延対寺荘
Toyama Kurobe· 宇奈月温泉Unazuki Onsen
Pristine Piped Gorge Spring

This hot spring embodies the enduring passion of pioneers, delivered from Kuronagi Onsen in the upper reaches of the Kurobe River to Unazuki Onsen, approximately 7km downstream, after arduous wooden pipe laying construction in Taisho 12 (1923). Gushing at an abundant rate of approximately 2,000 liters per minute, its colorless and transparent waters seem to embody the pristine clarity of the gorge itself. With a soft touch that gently envelops the skin, it slowly warms the body to its core. Ideal for those seeking to unwind their mind and body, embraced by nature, at the various inns and public bathhouses throughout the town.

Onsen RyokanDay-use BathPrivate Rental Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline8.2
0714
TEMP98.3℃
0℃50℃100℃
KEY MINERALS
6.2 mg/kg

A trace antibacterial component that keeps skin clean.

A trace component with gentle antibacterial and anti-inflammatory action.

A natural moisturizer that leaves a hydrated feel on the skin.

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Ohara Onsen Seryo Simple Spring
Simple SpringInfo pending
Ohara Onsen Seryo
大原温泉 芹生
Kyoto Sakyo Ward, Kyoto· 大原温泉
Skin-Beautifying Spring of Kyoto's Mountain Village

Opened in 2004, Ohara Onsen in Kyoto's Ohara district offers a colorless, transparent spring nestled in a mountain village near renowned temples like Sanzen-in and Jakkō-in. Its signature feature is a gentle, soft texture that delicately envelops the skin. Immersing yourself in this weakly alkaline, smooth water amidst the ancient capital's tranquility will slowly release tension from your stiff body and mind. This onsen is perfect for those seeking serene moments surrounded by abundant nature, far from the daily hustle.

Onsen RyokanRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
TEMP26℃
0℃50℃100℃
KEY MINERALS
8.2 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

Softens dead skin cells for a silky bathing feel.

A natural moisturizer that leaves a hydrated feel on the skin.

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Kita Onsen Simple Spring
Simple SpringInfo pending
Kita Onsen
北温泉
Tochigi Nasu· 北温泉 相の湯Nasu Onsen-go
Tengu Valley Brimming Spring

This is the water of a bathing retreat in a valley near the source of the Yosasa River, at the very end of the Nasu hot spring area. Legend says a great tengu found the springs here around 770, and the site once served as a training ground for mountain ascetics. Ai no Yu is drawn into a Meiji-era bathhouse whose name recalls that it was once the only mixed bath. Rising naturally at 85.3 L/min and brimming over the tub's edge, it suits those who want to lose track of time at a mountain toji retreat.

Onsen RyokanPrivate Rental Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral6.9
0714
TEMP50.1℃
0℃50℃100℃
KEY MINERALS

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

Softens dead skin cells for a silky bathing feel.

A trace component with gentle antibacterial and anti-inflammatory action.

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Tsurutsuru no Yu Gero Onsen Minoriso Simple Spring
Simple SpringInfo pending
Tsurutsuru no Yu Gero Onsen Minoriso
つるつるの湯 下呂温泉 みのり荘
Gifu Gero· 下呂温泉(幸田ポンプ所)Gero Onsen
Silky Waters of the Heron

Gero Onsen counts among Japan's three famous springs, and legend holds that when its waters once vanished, a white heron alighted on the Masuda riverbank to reveal a new gush sent by the healing Buddha Yakushi. The Gero Onsen Koda pump station source gathers several centrally managed wells and sends them to inns across the Koda district. Its pH 9.4 alkaline water glides softly over the skin and lingers as a light, refreshed feeling afterward, soothing travelers who seek gentle rest.

Onsen RyokanPrivate Rental Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Alkaline9.4
0714
TEMP56℃
0℃50℃100℃
KEY MINERALS
17.0 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

A natural moisturizer that leaves a hydrated feel on the skin.

Gentle antibacterial action that conditions the skin.

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Gero Kanko Hotel Simple Spring
Simple SpringInfo pending
Gero Kanko Hotel
下呂観光ホテル
Gifu 下呂市· 下呂温泉(幸田ポンプ所)Gero Onsen
Silky Waters of the Heron

Gero Onsen counts among Japan's three famous springs, and legend holds that when its waters once vanished, a white heron alighted on the Masuda riverbank to reveal a new gush sent by the healing Buddha Yakushi. The Gero Onsen Koda pump station source gathers several centrally managed wells and sends them to inns across the Koda district. Its pH 9.4 alkaline water glides softly over the skin and lingers as a light, refreshed feeling afterward, soothing travelers who seek gentle rest.

Onsen RyokanPrivate Rental BathRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Alkaline9.4
0714
TEMP56℃
0℃50℃100℃
KEY MINERALS
17.0 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

A natural moisturizer that leaves a hydrated feel on the skin.

Gentle antibacterial action that conditions the skin.

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Yama no Kami Onsen Yuukaen Simple Spring
Simple SpringInfo pending
Yama no Kami Onsen Yuukaen
山の神温泉 優香苑
Iwate Hanamaki· 山の神温泉(福の湯) 他 1 件Hanamaki Minami Onsenkyo
Silky Riverside Waters

Hanamaki Minami Onsenkyo strings seven spas along the Toyosawa River south of Hanamaki. Yama no Kami Onsen, midway along it, takes its name from a shrine to the mountain deity. Fuku-no-yu is one of its wells, pumping a generous 226 liters a minute at about 42°C. Clear, faintly sulfurous and alkaline at pH 9.3, the water has a silky, clinging feel, made for unhurried soaks to the sound of the river.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Alkaline9.3
0714
TEMP42.2℃
0℃50℃100℃
KEY MINERALS
8.9 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

13.0 mg/kg

A trace component with gentle antibacterial and anti-inflammatory action.

7.5 Bq/kg

A rare radioactive spring where trace radiation absorbed via inhalation and skin is expected to stimulate cells (the "hormesis effect").

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Arimaonsen Takayamasou Hanano Radioactive Spring
Radioactive SpringSimple SpringChloride SpringInfo pending
Arimaonsen Takayamasou Hanano
有馬温泉 高山荘 華野
Hyogo Kobe· ラドン泉, 1号 他 1 件
The Silver Spring of Healing

This Radon-sen No. 1 source plays a key role as one of the "Ginsen" (Silver Springs) that color the history of Arima Onsen, one of Japan's three ancient hot springs. In contrast to the reddish-brown "Kinsen" containing iron, Ginsen is characterized by its clear, smooth feel. The water from this source is said to gently stimulate cells and vitalize the body as it's absorbed through breathing.

Onsen RyokanRoom with Open-air BathTattoo OK (public bath)
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral6.94
0714
TEMP14.6℃
0℃50℃100℃
KEY MINERALS
637 Bq/kg

A rare radioactive spring where trace radiation absorbed via inhalation and skin is expected to stimulate cells (the "hormesis effect").

2.8 mg/kg

A trace antibacterial component that keeps skin clean.

A natural moisturizer that leaves a hydrated feel on the skin.

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Namari Onsen Fuji San Ryokan Simple Spring
Simple SpringInfo pending
Namari Onsen Fuji San Ryokan
鉛温泉 藤三旅館
Iwate Hanamaki· 鉛温泉 桂の湯+下の湯(混合泉)Hanamaki Minami Onsenkyo
The Gentle Waters of the White Monkey Legend on the Toyosawa River

Namari Onsen, said to have opened some 600 years ago, is the single-inn spa of the Hanamaki Minami hot spring area. Legend tells of a white monkey bathing in water welling up at the foot of a katsura tree, remembered in the names of the Katsura-no-yu source and the naturally gushing Hakuen-no-yu rock bath. Fuji San Ryokan, founded in 1841, uses several sources bath by bath. This analysis covers a blend in which the cooler Shimo-no-yu is added to the hotter Katsura-no-yu to reach a comfortable temperature, feeding baths such as Shiraito-no-yu overlooking the Shiraito Falls. The weakly alkaline water feels smooth and invites deep relaxation to the sound of the river.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline8.2
0714
TEMP48.2℃
0℃50℃100℃
KEY MINERALS
3.0 mg/kg

A trace antibacterial component that keeps skin clean.

5.3 Bq/kg

A rare radioactive spring where trace radiation absorbed via inhalation and skin is expected to stimulate cells (the "hormesis effect").

A natural moisturizer that leaves a hydrated feel on the skin.

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Sengokuharaonsen Senkyourou Acidic Spring
Acidic SpringSulphate SpringChloride SpringVerified
Sengokuharaonsen Senkyourou
仙郷楼
Kanagawa Hakone· 大涌谷温泉 蒸気造成混合泉
Owakudani's Earthly Pulse

Originating from the fumaroles of Owakudani, born from the eruption of Hakone volcano approximately 3,000 years ago, this artificially developed hot spring began to be supplied to Sengokuhara and Gora by Hakone Onsen Kyokyu Co., Ltd. in Showa 5 (1930). Its renowned milky white waters, blended with naturally gushing spring water, offer a pleasant sensation that tightens the skin and a powerful restorative warmth that penetrates deep into the body's core. After bathing, you'll feel surprisingly refreshed and light. It's a perfect companion when you seek to feel the Earth's energy and achieve deep relaxation and rejuvenation for your mind and body.

Onsen RyokanPrivate Rental BathRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Acidic2.1
0714
TEMP60.6℃
0℃50℃100℃
KEY MINERALS
7.5 mg/kg

Tightens the skin and balances sebum.

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

14.2 mg/kg

A trace component with gentle antibacterial and anti-inflammatory action.

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Matsunoyama Onsen Izumiya Chloride Spring
Chloride SpringInfo pending
Matsunoyama Onsen Izumiya
松之山温泉 和泉屋
Niigata Tokamachi· 鷹の湯 混合泉
Salty hot water embracing warmth

Nestled in the scenic town of Matsuyama, this spring has long been cherished for relieving traveler fatigue, boasting robust eagle-like properties. The hypertonic chloride waters envelop the skin, smoothly expelling excess fluids and metabolic waste. The lightness after bathing and deep-penetrating warmth soothe the mind and body, freeing you from daily stress. Ideal for those with chronic stiffness or cold extremities, and perfect for weekend rejuvenation.

Onsen RyokanPrivate Rental BathRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline7.8
0714
TEMP88.7℃
0℃50℃100℃
KEY MINERALS

Undissociated boric acid with antibacterial action that keeps the skin surface clean.

9514 mg/kg

Salinity comparable to seawater. The salt film traps heat for outstanding warmth ("hot bath spring").

35.0 mg/kg

Gentle calming action; often found alongside chloride.

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Tamagawa Onsen Acidic Spring
Acidic SpringCarbon Dioxide SpringFerruginous SpringChloride SpringInfo pending
Tamagawa Onsen
日本の山岳温泉リゾート 新玉川温泉
Akita Semboku· 大噴Tamagawa Onsen
Fierce Acid Spring from the Earth

Obuki is the roaring source at the heart of the steaming geothermal field of Tamagawa Onsen, on the southern slopes of Hachimantai. Its output from a single vent is often said to be the largest in Japan, and the fumarole field around it has long produced mineral deposits and the rare hokutolite stone. Every bath in the spa draws on this one source, served either straight or cut with fresh water. At pH 1.13 the water tingles sharply on the skin while warming the body to the core, and it has welcomed long-stay therapeutic bathers for generations, a spring for those who want to meet nature at full strength.

Onsen RyokanPrivate Rental Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Acidic1.13
0714
TEMP97.3℃
0℃50℃100℃
KEY MINERALS
142 mg/kg

Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.

59.5 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

68.0 mg/kg

Undissociated boric acid with antibacterial action that keeps the skin surface clean.

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Kinosaki Onsen Senshi Chloride Spring
Chloride SpringInfo pending
Kinosaki Onsen Senshi
城崎温泉 泉都
Hyogo 豊岡市· 城崎温泉 集中管理混合泉
The Town-Wide Salt Spring

Kinosaki Onsen's centrally managed mixed spring gathers water from several wells into a large storage tank, where its temperature is steadied before it flows through a looped pipe beneath the streets to the town's public bathhouses and inns. Managed as a shared resource by the Yushima property ward of Kinosaki, this faintly salty water wraps the body in warmth that lingers long after bathing, suiting travellers who stroll from bath to bath in yukata.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral7.3
0714
TEMP62.1℃
0℃50℃100℃
KEY MINERALS
70.0 Bq/kg

A rare radioactive spring where trace radiation absorbed via inhalation and skin is expected to stimulate cells (the "hormesis effect").

2460 mg/kg

Boosts after-bath warmth and warms the body from the core.

8.0 mg/kg

Gentle calming action; often found alongside chloride.

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Irori no Oyado Hanashiki no Yu Sulphate Spring
Sulphate SpringChloride SpringInfo pending
Irori no Oyado Hanashiki no Yu
囲炉裏の御宿 花敷の湯
Gunma Nakanojo, Agatsuma District· 元の湯(花敷共有泉)
Riverside Blossom Spring

Motonoyu is the shared source of Hanashiki Onsen, welling up beside the confluence of the Shirasuna and Nagasasazawa rivers and managed by the local Iriyama Hanashiki property association. Legend says Minamoto no Yoritomo named the spa after mountain flowers reflected on the water, like a carpet of blossoms. The clear water carries a faint hint of sulfur, soothes the skin and lets warmth linger long after bathing, ideal for unhurried soaks to the sound of the mountain stream.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline7.9
0714
TEMP43℃
0℃50℃100℃
KEY MINERALS
12.2 mg/kg

A trace component with gentle antibacterial and anti-inflammatory action.

A natural moisturizer that leaves a hydrated feel on the skin.

488 mg/kg

Soothes the skin and gently improves circulation.

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Tenchi no Yado Oku no Hosomichi Chloride Spring
Chloride SpringInfo pending
Tenchi no Yado Oku no Hosomichi
天地の宿 奥の細道
Hyogo 北区· 極楽泉源Arima Onsen
The Taiko's Wish-Fulfilling Spring

Gokuraku Gensen is a source for the iconic "Kinsen" (gold spring) of Arima Onsen, one of Japan's three ancient hot springs. It was once called "Negai no Yu" (Spring of Wishes) and its history is tied to Toyotomi Hideyoshi, who had its waters channeled to his private bathhouse. The rich water, which turns a reddish-brown when exposed to air, has been cherished by therapeutic bathers for centuries. Its high salt concentration envelops the skin, providing long-lasting warmth after bathing. Steeping in this historic spring, you can feel the deep warmth that once soothed samurai warlords, offering a true escape from daily fatigue.

Onsen RyokanPrivate Rental BathRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral6.94
0714
TEMP98.1℃
0℃50℃100℃
KEY MINERALS

Undissociated boric acid with antibacterial action that keeps the skin surface clean.

7930 mg/kg

Salinity comparable to seawater. The salt film traps heat for outstanding warmth ("hot bath spring").

4336 mg/kg

Salt forms a thin film on the skin, retaining heat after bathing. Helps with poor circulation.

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Kusatsuonsen Ichii Acidic Spring
Acidic SpringChloride SpringSulphate SpringSulphur SpringInfo pending
Kusatsuonsen Ichii
ホテル一井
Gunma Kusatsu· 万代鉱 他 1 件Kusatsu Onsen
The Strongest Spring from the Mine

The Bandaiko source, which unexpectedly erupted from within the Bandai Sulfur Mine in 1970, now stands as Kusatsu's primary hot spring, boasting the largest output and supporting the town. Named with the wish for 'eternal prosperity' (万代), this powerful source was born in the mountains, far from the Yubatake (Kusatsu's central hot-water field). Its colorless, transparent waters deliver a stimulating tingle that awakens both mind and body, while its robust warmth permeates to the very core. This energetic spring is a perfect companion for those seeking liberation from daily routines and a crisp mental and physical rejuvenation.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Acidic1.7
0714
TEMP94.6℃
0℃50℃100℃
KEY MINERALS
43.2 mg/kg

Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.

25.1 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

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Yakumo Onsen Obokooso Carbonated Spring
Carbonated SpringChloride SpringInfo pending
Yakumo Onsen Obokooso
八雲温泉おぼこ荘
Hokkaido Yakumo, Futami District· 鉛川 第3号井 他 1 件
Carbonated Salt Waters of the Namarikawa Hills

Yakumo Onsen lies in forested hills along the Namarikawa River on the Oshima Peninsula. Water from Namarikawa Well No. 3 is rich in bicarbonate and chloride and carries over 410 mg/kg of free carbon dioxide. It carries a faint scent of iron and is concentrated enough for mineral crystals to float on the surface. Slightly salty, it warms the body to the core while leaving the skin moist and smooth, suiting those who want a long, unhurried soak in mineral-rich water to the sound of the river.

Onsen RyokanRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral6.3
0714
TEMP47.2℃
0℃50℃100℃
KEY MINERALS
47.2 mg/kg

A trace component with gentle antibacterial and anti-inflammatory action.

1243 mg/kg

A "beauty spring" that gently emulsifies dead skin cells, leaving skin smooth after bathing.

A natural moisturizer that leaves a hydrated feel on the skin.

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Matsunoyama Onsen Ponshu Hotel Suimu Chloride Spring
Chloride SpringInfo pending
Matsunoyama Onsen Ponshu Hotel Suimu
松之山温泉 Ponshu Hotel 睡夢
Niigata Tokamachi· 鷹の湯 混合泉
Salty hot water embracing warmth

Nestled in the scenic town of Matsuyama, this spring has long been cherished for relieving traveler fatigue, boasting robust eagle-like properties. The hypertonic chloride waters envelop the skin, smoothly expelling excess fluids and metabolic waste. The lightness after bathing and deep-penetrating warmth soothe the mind and body, freeing you from daily stress. Ideal for those with chronic stiffness or cold extremities, and perfect for weekend rejuvenation.

Onsen RyokanPrivate Rental Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline7.8
0714
TEMP88.7℃
0℃50℃100℃
KEY MINERALS

Undissociated boric acid with antibacterial action that keeps the skin surface clean.

9514 mg/kg

Salinity comparable to seawater. The salt film traps heat for outstanding warmth ("hot bath spring").

35.0 mg/kg

Gentle calming action; often found alongside chloride.

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Kinosaki Onsen Yamashiroya Ryokan Chloride Spring
Chloride SpringInfo pending
Kinosaki Onsen Yamashiroya Ryokan
城崎温泉 山しろや旅館
Hyogo 豊岡市· 城崎温泉 集中管理混合泉
The Town-Wide Salt Spring

Kinosaki Onsen's centrally managed mixed spring gathers water from several wells into a large storage tank, where its temperature is steadied before it flows through a looped pipe beneath the streets to the town's public bathhouses and inns. Managed as a shared resource by the Yushima property ward of Kinosaki, this faintly salty water wraps the body in warmth that lingers long after bathing, suiting travellers who stroll from bath to bath in yukata.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral7.3
0714
TEMP62.1℃
0℃50℃100℃
KEY MINERALS
70.0 Bq/kg

A rare radioactive spring where trace radiation absorbed via inhalation and skin is expected to stimulate cells (the "hormesis effect").

2460 mg/kg

Boosts after-bath warmth and warms the body from the core.

8.0 mg/kg

Gentle calming action; often found alongside chloride.

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Hakone Suishouen Chloride Spring
Chloride SpringCarbonated SpringVerified
Hakone Suishouen
箱根・翠松園
Kanagawa Hakone· 小涌谷温泉Hakone Onsen
Meiji-Era Kowakudani Spring

Kowakidani Onsen, once known as 'Kojigoku' (Small Hell) due to its fumaroles, was renamed in 1873 following Emperor Meiji's visit. This mixed spring, combining multiple sources developed since the late Meiji era, stands as one of Hakone's most iconic hot springs. Its waters envelop the skin in a comforting salt veil, delivering restorative warmth deep into the body's core. This mellow, historically rich spring is highly recommended for those seeking deep relaxation and a profound reset from daily life.

Onsen RyokanRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline7.9
0714
TEMP60℃
0℃50℃100℃
KEY MINERALS

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

Softens dead skin cells for a silky bathing feel.

A trace component with gentle antibacterial and anti-inflammatory action.

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Kusatsu Onsen Hotel Sakurai Acidic Spring
Acidic SpringChloride SpringSulphate SpringSulphur SpringInfo pending
Kusatsu Onsen Hotel Sakurai
草津温泉 ホテル櫻井
Gunma 草津町· 万代鉱 他 2 件Kusatsu Onsen
Scalding Strong Acidic Spring

The Mandaiko source, originating from traces of past mining development, is deeply intertwined with Kusatsu Onsen's unique yumomi culture and its long history of toji (therapeutic bathing). Its highly acidic waters, among Japan's most potent, deliver a distinctive tingling sensation, awakening both mind and body and offering a sense of rejuvenation. The high-temperature blessings penetrate deep into the core, leaving you with a surprisingly light and refreshed feeling after your bath. We invite those seeking a genuine toji experience, a true escape from daily life to restore their mind and body, to discover the profound power of this spring.

Onsen RyokanRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Acidic1.75
0714
TEMP94.6℃
0℃50℃100℃
KEY MINERALS
43.2 mg/kg

Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.

25.1 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

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Date Onsen Chloride Spring
Chloride SpringInfo pending
Date Onsen
伊達温泉
Hokkaido Date City· 伊達温泉 2号井
Farm-Born Salt Spring

The spring began in 1975, when a local farmer bored for hot water to warm his greenhouses and his own bath. Redrilled in 1999 to about 1,520 m, Well No. 2 now yields 73.6°C water: nearly colorless and clear, yet unmistakably salty, a dense sodium- and calcium-bearing chloride spring with a plain, sturdy character.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline7.7
0714
TEMP73.6℃
0℃50℃100℃
KEY MINERALS
65.2 mg/kg

Undissociated boric acid with antibacterial action that keeps the skin surface clean.

6156 mg/kg

Salinity comparable to seawater. The salt film traps heat for outstanding warmth ("hot bath spring").

3492 mg/kg

Salt forms a thin film on the skin, retaining heat after bathing. Helps with poor circulation.

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Onsen Ryokan Yumoto Chloride Spring
Chloride SpringInfo pending
Onsen Ryokan Yumoto
温泉旅館ゆもと
Akita Oga· 湯本温泉Oga Onsen-go
Oga's Ancient Hot Salt Spring

Temple records say this spring has flowed for more than 600 years, and the lords of the Akita domain and the travel writer Sugae Masumi are said to have bathed here. Travertine thousands of years old has been found nearby. Rich in sodium (1,794 mg), chloride (2,970 mg), calcium (318.9 mg) and bicarbonate (996.3 mg), it builds mineral crust on the tub edges. It is like a seasoned master of the old healing-bath tradition.

Onsen RyokanPrivate Rental Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral7
0714
TEMP53.5℃
0℃50℃100℃
KEY MINERALS
52.9 mg/kg

Undissociated boric acid with antibacterial action that keeps the skin surface clean.

Softens dead skin cells for a silky bathing feel.

2970 mg/kg

Boosts after-bath warmth and warms the body from the core.

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Kusatsu Onsen Itouyen Hotel Kusatsu Acidic Spring
Acidic SpringChloride SpringSulphate SpringInfo pending
Kusatsu Onsen Itouyen Hotel Kusatsu
草津温泉 伊東園ホテル草津
Gunma 草津町· 万代鉱
Scalding Strong Acidic Spring

The Mandaiko source, originating from traces of past mining development, is deeply intertwined with Kusatsu Onsen's unique yumomi culture and its long history of toji (therapeutic bathing). Its highly acidic waters, among Japan's most potent, deliver a distinctive tingling sensation, awakening both mind and body and offering a sense of rejuvenation. The high-temperature blessings penetrate deep into the core, leaving you with a surprisingly light and refreshed feeling after your bath. We invite those seeking a genuine toji experience, a true escape from daily life to restore their mind and body, to discover the profound power of this spring.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Acidic1.75
0714
TEMP94.6℃
0℃50℃100℃
KEY MINERALS
43.2 mg/kg

Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.

25.1 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

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Kusatsuonsen Tenojiya Sulphur Spring
Sulphur SpringAcidic SpringChloride SpringSulphate SpringInfo pending
Kusatsuonsen Tenojiya
草津温泉 ての字屋
Gunma Kusatsu· 宝泉の湯 他 1 件
The Rock-Born Treasure Spring

Housen-no-Yu, a precious spring at Kusatsu Onsen, one of Japan's three most famous hot springs, has naturally gushed from bedrock for approximately 1200 years. Distinct from major sources like Yubatake and Bandaiko, this rare water gently envelops the skin with its sulfurous aroma. Its crisp quality offers a sensation of purifying both mind and body. After bathing, your skin will feel wonderfully silky, and the restorative warmth from deep within will invite deep relaxation, supporting overall rejuvenation. It is highly recommended for those seeking to escape daily life and reset themselves with a truly special hot spring experience.

Onsen RyokanRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Acidic2
0714
TEMP45℃
0℃50℃100℃
KEY MINERALS
43.3 mg/kg

Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.

The source of the distinctive sulfur smell. Dilates blood vessels via skin and inhalation to strongly boost circulation.

8.4 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

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Hakonekowakien Tenyuu Chloride Spring
Chloride SpringVerified
Hakonekowakien Tenyuu
箱根小涌園 天悠
Kanagawa Hakone· 小涌園供給温泉Hakone Onsen
The Bountiful Spring of Kowakidani

The Kowakien Kyokyu Onsen is a steam-generated spring developed since 1949 to supply the Hakone Kowakien resort area. It utilizes geothermal heat from former fumarolic activity along the Kurumazawa stream, a tributary of the Jakotsu River, blending multiple sources and natural spring water. This source is widely distributed to the various facilities of the Hakone Kowakien resort, operated by Fujita Kanko, forming the foundation of the entire resort.

Onsen RyokanRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral7.4
0714
TEMP76.5℃
0℃50℃100℃
KEY MINERALS
19.5 mg/kg

A trace component with gentle antibacterial and anti-inflammatory action.

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

Softens dead skin cells for a silky bathing feel.

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Hamaton Betsu Onsen Wing Chloride Spring
Chloride SpringCarbonated SpringInfo pending
Hamaton Betsu Onsen Wing
はまとんべつ温泉ウィング
Hokkaido Hamatombetsu, Esashi District· 浜頓別温泉
Kuccharo Lakeside Warmth

Rising near Lake Kuccharo, a famed stopover for migrating swans close to the Sea of Okhotsk, Hamatombetsu Onsen has long warmed this northern lakeside town. Sodium-rich, with chloride and bicarbonate in near balance, it offers both smoothness and lasting warmth, and its unusually high metaboric acid adds a distinctive character to this quiet lakeside spring.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline8.01
0714
TEMP47.5℃
0℃50℃100℃
KEY MINERALS

Undissociated boric acid with antibacterial action that keeps the skin surface clean.

2849 mg/kg

A "beauty spring" that gently emulsifies dead skin cells, leaving skin smooth after bathing.

2260 mg/kg

Gentle warming effect that helps you stay warm after bathing.

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Tajimayaryokan Sulphur Spring
Sulphur SpringAcidic SpringChloride SpringSulphate SpringInfo pending
Tajimayaryokan
草津温泉 田島屋旅館
Gunma Kusatsu· 湯畑源泉Kusatsu Onsen
The Cure-All Spring

The Yubatake source, naturally gushing from Kusatsu Onsen's iconic Yubatake (Kusatsu's central hot-water field), holds a distinguished history. During the Edo period, it was ranked as the highest-ranking Ozeki in the Onsen Banzuke, recognized alongside the Shirahata source as one of Kusatsu's two major hot springs. Its powerful, pH2 water, permeated with a sulfurous aroma, imparts a refreshing, tightening sensation upon the skin. A soak in this historic, renowned hot spring cleanses the body and mind, offering deep relaxation and rejuvenation from daily fatigue. It is a must-visit for those seeking to feel the energy of a historic hot spring and desire a complete refresh.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Acidic2
0714
TEMP52.3℃
0℃50℃100℃
KEY MINERALS
49.1 mg/kg

Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.

The source of the distinctive sulfur smell. Dilates blood vessels via skin and inhalation to strongly boost circulation.

10.1 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

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Kinosaki Onsen Ryokan Tsubaki no Chloride Spring
Chloride SpringInfo pending
Kinosaki Onsen Ryokan Tsubaki no
城崎温泉 旅館 つばき乃
Hyogo 豊岡市· 城崎温泉 集中管理混合泉
The Town-Wide Salt Spring

Kinosaki Onsen's centrally managed mixed spring gathers water from several wells into a large storage tank, where its temperature is steadied before it flows through a looped pipe beneath the streets to the town's public bathhouses and inns. Managed as a shared resource by the Yushima property ward of Kinosaki, this faintly salty water wraps the body in warmth that lingers long after bathing, suiting travellers who stroll from bath to bath in yukata.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral7.3
0714
TEMP62.1℃
0℃50℃100℃
KEY MINERALS
70.0 Bq/kg

A rare radioactive spring where trace radiation absorbed via inhalation and skin is expected to stimulate cells (the "hormesis effect").

2460 mg/kg

Boosts after-bath warmth and warms the body from the core.

8.0 mg/kg

Gentle calming action; often found alongside chloride.

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Kyukakamuon Nyuto Onsen Kyogo Carbonated Spring
Carbonated SpringSulphur SpringSimple SpringInfo pending
Kyukakamuon Nyuto Onsen Kyogo
休暇村 乳頭温泉郷
Akita Semboku· 乳頭の湯 他 1 件Nyuto Onsen-go
The Silky Spring of the Beech Forest

This spring rises on a plateau wrapped in old-growth beech forest at the foot of Mt. Akita-Komagatake, the gateway to Nyuto Onsen. Unlike the milky sulfur springs that dominate the area, it is a brownish bicarbonate water that leaves the skin slippery and smooth, with a faint tart taste and a hint of iron. It is warmed in the deep-snow winter months, and invites a side-by-side comparison with the area's white sulfur waters while you take in fresh green or autumn leaves.

Onsen RyokanTattoo OK (public bath)
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral6.9
0714
TEMP49.5℃
0℃50℃100℃
KEY MINERALS
1541 mg/kg

A "beauty spring" that gently emulsifies dead skin cells, leaving skin smooth after bathing.

25.1 mg/kg

A trace component with gentle antibacterial and anti-inflammatory action.

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

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Oku Yugawara Onsen Kamata Sulphate Spring
Sulphate SpringInfo pending
Oku Yugawara Onsen Kamata
奥湯河原温泉 加満田
Kanagawa Yugawara· 湯河原温泉 湯河原第77号
Oku-Yugawara Gorge Gypsum Spring

Yugawara Onsen is an ancient spa sung of in the Man'yoshu poetry anthology, and Oku-Yugawara, its innermost reach, is a quiet retreat wrapped in the Fujiki River gorge and deep greenery. Yugawara No.77 is a private source here, a calcium sulfate spring once called a gypsum spring. Its main components are 939.0 mg/kg of sulfate and 398.0 mg/kg of calcium; the water is clear and mild in taste and smell, yet carries a faint toasty note typical of sulfate springs. Soft and weakly alkaline, it clings gently to the skin and has long been valued for soothing cuts and skin troubles, suiting bathers who want a calm soak amid the greenery.

Onsen RyokanPrivate Rental Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline7.5
0714
TEMP42℃
0℃50℃100℃
KEY MINERALS
939 mg/kg

Soothes the skin and gently improves circulation.

398 mg/kg

Gentle astringent action that conditions the skin.

A natural moisturizer that leaves a hydrated feel on the skin.

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Do ga Shima New Ginsuei Sulphate Spring
Sulphate SpringInfo pending
Do ga Shima New Ginsuei
堂ヶ島ニュー銀水
Shizuoka Nishiizu· 仁科・堂ヶ島5号・仁科・堂ヶ島16号混合泉
Gypsum Spring of the Dogashima Coast

On the Dogashima coast of western Izu, famed for sculpted rocks and sea caves, two Nishina sources are blended at the town's distribution station and piped in. Calcium makes up about 70 percent of the cations and sodium about 30, while sulfate exceeds 90 percent of the anions: a classic Izu gypsum-type sulfate spring. Alkaline at pH 8.8 yet moderately rich at 2.290 g/kg, the 52.4°C water wraps a body chilled by Suruga Bay breezes, an honest water to sink into as the sea turns gold at sunset.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHMildly Alkaline8.8
0714
TEMP52.4℃
0℃50℃100℃
KEY MINERALS
1472 mg/kg

Soothes the skin and gently improves circulation.

468 mg/kg

Gentle astringent action that conditions the skin.

A natural moisturizer that leaves a hydrated feel on the skin.

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Sengakukan Carbon Dioxide Spring
Carbon Dioxide SpringInfo pending
Sengakukan
泉岳舘
Gifu Gero City· 泉岳舘泉
The Fizzing Spring of Hida-Osaka

At the foot of Mt. Ontake, Yuya Onsen in Hida-Osaka is said to have served bathers for some three centuries, and locals still repeat the saying that carbonated spring water beats stomach medicine. Pumped from underground at around 12°C, the cold mineral water is rich in carbon dioxide and tastes like soda. Its iron content sends fine brown flakes drifting through the bath and gives the water a smooth, slightly slick feel. Carbon dioxide springs are rare in Japan, making this one a true local character.

Onsen RyokanPrivate Rental BathRoom with Open-air Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHAcidic5.7
0714
TEMP12.2℃
0℃50℃100℃
KEY MINERALS

Bubbles cling to the skin and dilate blood vessels — the "heart spring." Warms the body even at lukewarm temperatures.

13.7 mg/kg

A trace component with gentle antibacterial and anti-inflammatory action.

Softens dead skin cells for a silky bathing feel.

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Kyowa Onsen Carbon Dioxide Spring
Carbon Dioxide SpringInfo pending
Kyowa Onsen
協和温泉
Hokkaido Aibetsu, Kamikawa District· 協和温泉(長寿湯、協和湯 混合泉)
Sparkling Cold Mineral Spring in Mushroom Country

Kyowa Onsen opened in 1969 in Aibetsu, a town known for mushrooms. Its two sources, Chojuyu and Kyowayu, rise from the same spot and carry more than 1,800 mg/kg of free carbon dioxide, a rarity in Hokkaido. Because boiling would drive off the gas and alter the minerals, the inn pours the source straight from the tap into a small tub and adds hot water to reach bathing temperature, letting it flow without recirculation. The iron-tinged, yellowish water leaves fine bubbles on the skin for a smooth feel.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHAcidic5.8
0714
TEMP9.5℃
0℃50℃100℃
KEY MINERALS

Bubbles cling to the skin and dilate blood vessels — the "heart spring." Warms the body even at lukewarm temperatures.

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

Softens dead skin cells for a silky bathing feel.

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Ryuno Yu Onsen Ferruginous Spring
Ferruginous SpringInfo pending
Ryuno Yu Onsen
龍乃湯温泉
Hokkaido Asahikawa· 龍乃湯温泉
Dragon-Dream Iron Spring

Local lore says this spring was found after a dream of the dragon god of a nearby shrine declaring that hot water lay beneath Higashiasahikawa. Clear at the wellhead, its abundant iron oxidizes in air, turning the bath an ochre hue with a distinctly squeaky, metallic feel on the skin.

Onsen Ryokan
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHNeutral6.4
0714
TEMP9.4℃
0℃50℃100℃
KEY MINERALS
23.2 mg/kg

An iron-rich spring whose water turns yellow-brown to red-brown when exposed to air. Strong heat retention.

A trace component with gentle antibacterial and anti-inflammatory action.

A natural moisturizer that leaves a hydrated feel on the skin.

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Nakabusa Onsen Sulphur Spring
Sulphur SpringInfo pending
Nakabusa Onsen
中房温泉
Nagano Azumino· 蒸し風呂1号と小鍋立との混合泉
Silky Sulfur Waters in the Heart of the Northern Alps

Nakabusa Onsen is a lone mountain inn in the Northern Alps, where legend says the general Sakanoue no Tamuramaro healed his wounded soldiers; a bathhouse opened here in 1821 alongside alum mining. With nearly 30 naturally flowing sources, each tub offers a different spring. This mixed spring feeds the Oyu bath, combining Mushiburo No. 1 and Konabetate and cooling the water by heat exchange and air rather than adding water. The alkaline water is silky enough to make the floor slippery, with a faint sulfur scent and valley views from the open-air tub.

Onsen RyokanPrivate Rental Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Alkaline9.2
0714
TEMP77℃
0℃50℃100℃
KEY MINERALS
12.8 mg/kg

Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.

A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.

Gentle antibacterial action that conditions the skin.

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