Like swimwear, it's regarded as potentially polluting. Others are tiny family-run businesses. An onsen may or may not make concessions, allowing "fashion tattoos". I spent two semesters in China Chengdu, Shanghai, and Taipei. Well, they're not really rules - more custom and etiquette. More Japan National Tourist Organisation: Chris Pritchard offers some handy tips to avoid any cultural faux pas.
Outside, there was another pleasantly warm larger pool, tub, bath, and a pretty typical jacuzzi.
Nude woman relaxing at Japanese Hot springs and spa
SOME travellers go to extraordinary lengths to take a bath. Well, they're not really rules - more custom and etiquette. In the lobby of my hotel I bump into two irate Australian women, ejected because of big tattoos. I mean, does it for you? The writer was a guest of Globus Tours.