Tokainaka Onsen
東海中温泉とうかいなかおんせん
Wild Onsen
Kyushu & Okinawa·Kagoshima
Day Use
Yes¥0
Bathing & Water
Natural onsen water
Uses natural hot spring water
Outdoor BathYes
Open-air outdoor bath
Bathing Arrangements
Mixed BathingYes
Shared bathing area for all genders
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Last updated June 9, 2026