Shimoda Onsen is a hot spring resort located on the Izu Peninsula in Shizuoka Prefecture. Its hot springs are simple hot springs, and have a wide range of effects. As indications by the type of hot spring, it is effective for autonomic nervous instability, insomnia, depression, and more. In addition, common indications include chronic muscle and joint pain and stiffness, coldness, decreased gastrointestinal function, and mild hypertension. As a result, many people visit Shimoda Onsen seeking healing and health promotion. On the other hand, there are also contraindications for entering the hot springs at Shimoda Onsen. Common contraindications include active tuberculosis, advanced malignant tumors, and severe physical weakness. Furthermore, those with severe heart or lung disease, kidney disease with edema, gastrointestinal bleeding, visible bleeding, or acute exacerbation of chronic disease should avoid bathing. By understanding the hot spring quality, indications, and contraindications of Shimoda Onsen, you can enjoy the hot springs with peace of mind when you visit.