Tenzan Onsen is a day-use hot spring in Hakone, Kanagawa, set in a forested valley with multiple outdoor baths, cave baths, and cedar-lined soaking pools. The alkaline mineral waters are known for skin health and muscle relaxation.
The onsen is foreigner-friendly, welcoming tattooed visitors without restrictions and offering information in English. With its natural setting, easy access from Hakone-Yumoto, and walk-in entry system, it is a convenient choice for international travelers.
