Traditional Japanese hot springs, known as Onsen, maintain strict regulations for visitors regarding nudity, tattoos, and cleanliness. Patrons are required to bathe completely nude, and those with tattoos are generally prohibited from entering unless they are covered. Prior to entering the baths, a thorough cleaning process is mandatory and closely monitored. These rules are in place to maintain the purity and cultural significance of the Onsen experience. Visitors are advised to be aware of these customs to avoid discomfort or causing offense. The regulations aim to preserve the traditional atmosphere and hygiene standards of these communal bathing facilities.