石風呂
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Meanings
1
stone bathtub
A bathtub made of stone, often found in traditional Japanese settings or hot spring resorts.
The inn's open-air bath had a large stone bathtub.
2
steam bath in a stone chamber
A steam bath taken inside a natural or man-made cavern or stone chamber, historically used for therapeutic purposes.
It is said that people in this area used to cure illnesses by taking steam baths in stone chambers.