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What Are Contraindications for Onsen? | Conditions & Diseases That Prohibit Bathing

Published May 6, 2026·1min read

Contraindications are medical conditions or states where hot spring bathing may worsen symptoms or cause serious harm. Japanese onsen facilities are legally required to post contraindication lists.

Q & A

Frequently Asked Questions

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Where can I check the contraindications?
They are listed on the spring analysis certificate (onsen bunsekisho) or the bathing precaution notice posted in the bathing area. You can also ask facility staff.
Are all hot springs off-limits during pregnancy?
General contraindications include pregnancy (especially the first and third trimesters). Some people in their second trimester enjoy mild simple thermal springs for a short time after consulting their doctor. Always follow your physician's guidance.

Types of Contraindications

General Contraindications (All Spring Types)

  • Acute illness (especially with fever)
  • Active tuberculosis
  • Malignant tumors
  • Serious heart disease or severe arteriosclerosis
  • Respiratory or renal failure
  • Hemorrhagic disorders
  • Severe anemia
  • Pregnancy (especially first and third trimesters)

Spring-Specific Contraindications (Examples)

  • Acidic springs: sensitive skin/mucous membranes, eye diseases
  • Sulfur springs: severe cases of chronic dermatitis
  • Radioactive springs: during radiation therapy, pregnancy
  • Iodine springs: those with thyroid conditions should confirm with a doctor
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References

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