Thermal bathing spans commercial natural thermal and mineral springs, hot-spa bathing, and sauna exposure. The available evidence covers a $46.33 billion estimated global sector in 2022, a large Japanese older-resident survey, and long-term observational sauna research in Finnish men.
Key Thermal Bathing Statistics
The most useful headline figures are:
- In 2022, 31,290 revenue-earning thermal/mineral springs establishments operated across 130 countries worldwide.
- In 2022, thermal/mineral springs businesses generated an estimated $46.33 billion worldwide.
- In 2022, Asia-Pacific had an estimated 22,689 thermal/mineral springs establishments.
- In 2022, Europe had an estimated 6,492 thermal/mineral springs establishments.
- From 2019 to 2022, the estimated global establishment count fell from 34,860 to 31,290.
- Global thermal/mineral springs revenue fell from $65.67 billion in 2019 to $39.93 billion in 2020.
- In 2022, China’s estimated thermal/mineral springs market was $10.17 billion.
- In 2022, Japan’s estimated thermal/mineral springs market was $8.59 billion.
- In 2022, Japan had an estimated 17,257 onsen, using the sector’s commercial-establishment definition.
- In the 2011 Beppu survey, 9,252 residents aged 65 and older provided valid responses for analysis.
- In the 2011 Beppu survey, 2,931 respondents reported hot-spa immersion lasting 10–19 minutes.
- In the 2011 Beppu survey, 2,918 respondents reported at least 40 years of hot-spa bathing.
- The Finnish sauna cohort included 2,315 men aged 42–60 years from eastern Finland at baseline in 1984–1989.
- During a median 20.7-year follow-up, the Finnish cohort recorded 929 deaths from any cause.
- Compared with one weekly sauna session, four to seven weekly sessions had an adjusted sudden-cardiac-death hazard ratio of 0.37 in the Finnish cohort.
- Compared with sessions under 11 minutes, sessions over 19 minutes had a sudden-cardiac-death hazard ratio of 0.48 in the Finnish cohort.
- During sauna exposure, moderate bathing can raise heart rate to about 100 beats per minute.
- At 80–90°C, reported sweat secretion during sauna exposure is 0.6–1.0 kilograms per hour.
Contents
- Global thermal bathing market scale and establishments
- Thermal bathing revenue trends by region and country
- Japan hot-spring bathing participation and habits
- Sauna bathing statistics and cardiovascular outcomes
- Sauna session frequency, duration and physiology
- Thermal bathing industry recovery and future development
Global Thermal Bathing Market Scale and Establishments
The Global Wellness Institute’s Global Wellness Economy Monitor 2023 estimates the commercial natural thermal/mineral springs sector rather than counting every natural spring or every heated bathing facility. Its figures include bathing, spa services, treatments, recreation, food and beverage, lodging, and other establishment revenue.
| 2022 geography | Estimated establishments | Estimated revenue |
|---|---|---|
| Asia-Pacific | 22,689 | $20.85 billion |
| Europe | 6,492 | $24.49 billion |
| Latin America-Caribbean | 1,179 | Not supplied |
| North America | 395 | $1.14 billion |
| Middle East-North Africa | 469 | Not supplied |
| Sub-Saharan Africa | 66 | Not supplied |
The worldwide estimate was 31,290 revenue-earning establishments in 130 countries and $46.33 billion in revenue in 2022. The estimated per-capita figure was $5.82, which is sector revenue divided by population, not individual consumer spending on bathing.
Source: Global Wellness Economy Monitor 2023. GWI excludes undeveloped free-access springs and facilities using artificially heated rather than naturally sourced thermal/mineral water, and its establishment count is not a census of natural springs.
The estimated world establishment total declined from 34,860 in 2019 to 31,290 in 2022. Historical figures were revised as data availability improved, so the change should be read as a reported series comparison rather than a perfectly fixed census.
Thermal Bathing Revenue Trends by Region and Country
The global revenue series shows a sharp pandemic-era contraction followed by partial recovery. These are nominal US-dollar estimates for the full qualifying establishment sector, not bathing admissions alone.
| Period | Estimated world revenue |
|---|---|
| 2019 | $65.67 billion |
| 2020 | $39.93 billion |
| 2021 | $45.39 billion |
| 2022 | $46.33 billion |
The sector’s estimated revenue declined 39.2% from 2019 to 2020, a shock the source largely attributes to pandemic closures and restrictions. From 2020 to 2022, revenue grew at an estimated 7.7% average annual rate, though exchange rates and reopening timing affect that comparison.
Country estimates illustrate the concentration of the market:
- China’s 2022 market was estimated at $10.17 billion, including multiple services and affected by pandemic restrictions.
- Japan’s 2022 market was estimated at $8.59 billion, including multiple services and lodging rather than only onsen bathing fees.
- Germany’s 2022 market was estimated at $6.79 billion across qualifying establishment revenue.
- Russia’s 2022 market was estimated at $4.46 billion across qualifying establishment revenue.
- The United States’ 2022 market was estimated at $1.04 billion across qualifying establishment revenue.
Source: Global Wellness Economy Monitor 2023. The regional and country figures should not be interpreted as household sauna sales or as prices paid for individual bathing visits.
Japan Hot-Spring Bathing Participation and Habits
The Beppu evidence describes older residents, not all Japanese adults or visitors to commercial facilities. In 2011, Beppu had 34,465 residents aged 65 or older when the survey frame was constructed; questionnaires were mailed to 20,000 residents, 11,146 responses were received, and 9,252 valid respondents were analyzed, including 4,081 men and 5,171 women.
Among the valid respondents, hot-spring water quality could be identified for 3,843 people. The reported immersion-duration categories were:
| Reported immersion duration | Respondents |
|---|---|
| Under 10 minutes | 1,439 |
| 10–19 minutes | 2,931 |
| 20–29 minutes | 1,900 |
| At least 30 minutes | 660 |
These are self-reported category counts from the analyzed Beppu sample, not a national participation rate. The survey also recorded the length of respondents’ bathing habit: 759 reported under 10 years, 1,251 reported 10–19 years, 965 reported 20–29 years, 1,037 reported 30–39 years, and 2,918 reported at least 40 years.
Source: Preventive and promotive effects of habitual hot spa-bathing on the elderly in Japan. The study’s sample is specific to older Beppu residents, and its findings should not be generalized to all ages, countries, or thermal facilities.
Sauna Bathing Statistics and Cardiovascular Outcomes
Sauna research measures a different exposure from natural hot-spring bathing. The Finnish cohort included 2,315 men aged 42–60 years from eastern Finland at baseline in 1984–1989, with a median follow-up of 20.7 years.
During follow-up, the cohort recorded 190 sudden cardiac deaths, 281 fatal coronary heart disease events, 407 fatal cardiovascular disease events, and 929 deaths from any cause. Sauna frequency was self-reported at baseline: 601 men reported one session per week, 1,513 reported two to three sessions, and 201 reported four to seven sessions.
| Sauna frequency at baseline | Sudden-cardiac-death event share | Fatal-CVD event share | All-cause mortality event share |
|---|---|---|---|
| One session weekly | 10.1% | 22.3% | 49.1% |
| Two to three weekly | 7.8% | 16.4% | 37.8% |
| Four to seven weekly | 5.0% | 12.0% | 30.8% |
Compared with one weekly session, the adjusted sudden-cardiac-death hazard ratio was 0.78 for two to three sessions and 0.37 for four to seven sessions. The corresponding 95% confidence intervals were 0.57–1.07 and 0.18–0.75.
Source: Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events. These are observational associations after adjustment, not randomized treatment effects; the cohort was male and region-specific.
Sauna Session Frequency, Duration and Physiology
The same Finnish research also compared session duration. Relative to sessions under 11 minutes, the hazard ratio for sudden cardiac death was 0.93 for 11–19-minute sessions and 0.48 for sessions over 19 minutes; the reported 95% confidence interval for the over-19-minute estimate was 0.31–0.75.
The over-19-minute group contained 528 men at baseline.
The article also summarizes physiological findings from prior literature rather than presenting a universal response for every user. Moderate sauna bathing can raise heart rate to about 100 beats per minute, while more intense warm sauna bathing can raise it to about 150 beats per minute.
At 80–90°C in a typical warm, relatively dry Finnish sauna, reported sweat secretion is 0.6–1.0 kilograms per hour. Mean total sweat secretion during a typical sauna session is reported as about 0.5 kilograms, but sweat loss is not identical to net dehydration and individual duration, hydration, temperature, and response vary.
Source: Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events. The duration findings remain observational, and the physiological ranges come from cited prior studies summarized in the article.
Thermal Bathing Industry Recovery and Future Development
The 2022 market was highly concentrated. Asia-Pacific and Europe together represented 94% of estimated revenue and 93% of establishments, while the top 20 countries accounted for 90% of the global market.
China and Japan together accounted for 40% of global sector revenue and 68% of global establishments in 2022. Japan alone had an estimated 17,257 onsen, equal to about 55% of worldwide establishments under GWI’s commercial-establishment definition.
Recovery was uneven at the end of 2022: most world regions were operating at roughly 75–90% of pre-pandemic levels, while China and Japan were at 48–60%. These ranges describe broad business levels, not a standardized occupancy or revenue metric.
The development data also combines completed openings with forward-looking projects:
- At least 150 new thermal/mineral springs establishments opened worldwide during 2020–2022; the figure excludes upgrades and expansions of existing properties.
- At least 42 new thermal/mineral springs projects had opened or were slated to open in 2023, so this is not solely a completed-opening count.
- More than 200 additional projects were in the future-opening or development pipeline in the 2023 report, with uncertain timing and completion.
- Japan’s hot-springs sector had seen about 3,500 primarily day-visit onsen closures in recent years through the 2022 report; GWI identified multiple contributing factors rather than attributing the closures to the pandemic alone.
Source: Global Wellness Economy Monitor 2023. Forecast-like pipeline figures and broad recovery ranges should remain clearly separated from observed historical revenue and establishment estimates.