Solaniwa Onsen Osaka Bay Tower
Osaka City, Osaka
Solaniwa Onsen Osaka Bay Tower is a large day-use hot spring in Osaka City, Osaka. Opened in 2019 inside the Osaka Bay Tower complex, it features nine types of baths, outdoor rotenburo, seven saunas, and a 3,000 m² rooftop garden. The natural hot spring water is drawn from 1,000 meters underground and is known for relieving muscle fatigue, joint pain, and nerve discomfort.
The onsen is foreigner-friendly but tattoos must be covered in public baths. Private outdoor baths are available for tattooed guests. Services include English-speaking staff, multilingual signage, online reservations, and credit card payment, making it accessible for international visitors seeking both comfort and cultural immersion.