What happens at hot springs?

Hot springs are heated by geothermal heat—heat from the Earth's interior. In volcanic areas, water may come into contact with very hot rock heated by magma. Hot springs in active volcanic zones may produce superheated water, so hot that immersion can result in injury or death.



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While clothing may be optional at your desired hot spring, it's always smart to have one on hand! You never know who could be there when you arrive, and it might feel weird or uncomfortable to be nude if you see a family with small children soaking in the pool you want to use.

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Leave No Trace at the Hot Springs Treat it the same way you would while you were hiking or camping outdoors so it can stay clean, beautiful, and continue to be preserved for others to enjoy. What is this? Also, do not bathe or use soap in the hot springs.

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Many will accept small, less noticeable tattoos while refusing guests with larger pieces. For the time being, those with tattoos need to come up with inventive ways to get around the restriction.

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For those opting for tampons, make sure that the string is not clearly visible and change it as soon as you leave the onsen. Wash yourself well and refrain from using another tampon right away — give yourself enough time to cool down first.

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