Tenzan Onsen - A Tattoo-Friendly Hot Spring in Hakone Onsen, Kanagawa

Nestled in the forested hills of Hakone, Tenzan Onsen (天山湯治郷) offers a tranquil escape that masterfully blends traditional Japanese bathing culture with the healing power of nature. This beloved day-use facility embraces the ancient concept of "toji" (hot spring cure), inviting visitors to heal body and spirit through immersion in mineral-rich alkaline waters while surrounded by cascading waterfalls, towering cedars, and meticulously designed rock formations.

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Unlike many traditional establishments, Tenzan extends a conditional welcome to tattooed visitors, making it a valuable find for international travelers eager to experience authentic Japanese onsen culture. With its rustic wooden architecture, multiple outdoor bathing pools, and extended evening hours, Tenzan provides a glimpse into the therapeutic ritual that has defined Japanese wellness for centuries.

Conditionally Tattoo-Friendly: Tenzan permits visitors with tattoos under specific guidelines – solo tattooed travelers or groups with only one tattooed member are welcome, but the establishment asks that tattooed guests enter separately and avoid gathering in groups within the bathing areas.

• Natural Outdoor Bathing: Seven distinct open-air baths nestled among lush forests, waterfalls, and artistic rock formations
• Unique Bathing Environments: Milky alkaline pools, atmospheric cave bath, and cedar-lined soaking tubs at various temperatures
• Evening Bathing Experience: Open until 11:00 PM, allowing for magical starlit soaking experiences
• Cultural Authenticity: Traditional Japanese bathing experience with a welcoming approach to international visitors
• Therapeutic Waters: Alkaline mineral springs (pH 9.3) known for beautifying skin and relieving muscle tension
• Atmospheric Setting: Perfect blend of traditional architecture and natural elements creating a quintessential Japanese onsen atmosphere

Stepping into Tenzan is like entering a secret mountain retreat where nature and traditional bathing culture harmoniously intersect. The facility separates into gender-specific bathing areas, each offering a unique collection of pools nestled among natural rock formations and verdant scenery. The women's section features six baths of varying temperatures, while men enjoy five distinct pools – each thoughtfully designed to create different sensory experiences.

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The milky, opaque waters (42-45°C) contain a rich mineral composition including sodium, calcium and chloride that locals believe soothes skin conditions, eases muscle tension, and improves circulation. A highlight for many visitors is the atmospheric cave bath where a statue of Daikoku (the Japanese god of wealth) keeps watch over bathers, while the cedar-lined pools infuse the air with a subtle forest fragrance. After cycling through the hot baths, guests can invigorate their circulation in the refreshing cold plunge pools or relax in the stone igloo-like steam room before retreating to tatami lounging areas for post-bath relaxation.

• Adult Admission: ¥1,450 
• Child Admission (Ages 1+): ¥700
• Towel Rental: ¥200
• Private Bath Rental: Available upon request (inquire at reception)
• Massage Services: ¥4,500 (40-minute treatment)

• Monday: 9:00 – 23:00
• Tuesday: 9:00 – 23:00
• Wednesday: 9:00 – 23:00
• Thursday: 9:00 – 23:00
• Friday: 9:00 – 23:00
• Saturday: 9:00 – 23:00
• Sunday: 9:00 – 23:00

No reservations are required for day use at Tenzan Onsen – simply arrive during operating hours and purchase your entry ticket at the front desk. The facility welcomes walk-in visitors, though arriving earlier in the day is recommended during peak seasons and weekends.

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🌐 Website: tenzan.jp/english  

📞 Phone: +81 460-864-126  

📍 Address: 208 Yumoto Chaya, Hakone-machi, Kanagawa Prefecture, Japan