Onsen Etiquette Guide: Rules, Tattoos and What to Expect

Bathing Protocol

Before entering the communal bath, wash your entire body thoroughly at the shower stations lining the bathing room wall. Sit on the provided stool, use the soap, shampoo, and conditioner provided, and rinse completely. No soap should enter the communal bath water. Enter the bath slowly, as water temperature ranges from 40 to 44 degrees Celsius, significantly hotter than Western baths. Your small towel stays out of the water, either folded on your head or placed on the bath’s edge. Swimsuits are not worn.

Tattoos remain prohibited at many onsen and sento public baths due to historical association with yakuza organized crime. Options for tattooed bathers include private rental baths (kashikiri-buro) at ryokan, tattoo-friendly facilities listed on Tattoo Friendly (tattoo-friendly.jp), or covering small tattoos with adhesive patches available at pharmacies. The policy is changing gradually, especially at facilities in international tourist areas.

Types of Baths

Rotenburo outdoor baths provide the quintessential onsen experience, particularly in winter when steam rises from the hot water into cold air. Sento neighborhood public baths charge 480 to 520 yen in Tokyo and offer a more local, everyday experience than tourist onsen. Super sento large-scale bathing facilities combine multiple pools, saunas, jet baths, and relaxation areas for 600 to 2,000 yen. Ashiyu foot baths, free in many hot spring towns, let you soak your feet while remaining clothed. Konyoku mixed-gender baths exist at some traditional onsen but are increasingly rare.

Step-by-Step Bathing Process

Enter the changing room (datsuijo), undress completely, and place clothes in a basket or locker. Take only the small hand towel into the bathing area. Sit on a stool at one of the washing stations and wash your entire body thoroughly with soap and shampoo, rinsing completely. Only then enter the communal bath. The water temperature typically ranges from 40 to 44 degrees Celsius, and entering slowly allows your body to adjust. Do not submerge your towel in the bath water; fold it and place it on your head or leave it at the bath’s edge. Soak quietly without splashing. Avoid onsen if you have open wounds, are intoxicated, or have eaten a large meal within the past hour. After bathing, pat dry in the bathing area before returning to the changing room to avoid dripping on the floor. Many onsen provide hair dryers, moisturizer, and other amenities in the changing room.

Private and Mixed-Gender Options

Kashikiri (private reservation) baths offer a solution for couples, families, and tattooed visitors who cannot or prefer not to use communal facilities. Most ryokan and many day-use onsen offer kashikiri for 1,000 to 3,000 yen per 30 to 60 minutes. Some facilities have rotenburo (outdoor baths) with private garden settings. Mixed-gender baths (konyoku) were historically common but have become rare, surviving mainly at remote mountain onsen in Tohoku and Hokkaido. Modern mixed-gender options usually require both genders to wear bath clothing (yuami-gi) rather than bathing nude.

Types of Onsen Water

Japanese onsen are classified by mineral content, with each type claiming different therapeutic benefits recognized under Japanese balneological tradition. Sulfur springs (iou-sen) produce milky white water with a distinctive rotten-egg smell, found at Noboribetsu and Kusatsu. Sodium chloride springs (shio-sen) warm the body for extended periods after bathing, common in coastal areas. Bicarbonate springs (tansan-sen) create a fizzing sensation on the skin like natural carbonated water, found at Nagayu in Oita. Iron springs (tetsu-sen) produce rust-colored water said to benefit blood circulation. Radioactive springs containing trace radon, like Misasa in Tottori, are paradoxically promoted for health benefits. The water temperature varies from lukewarm (nurume, 37 to 39 degrees) to extremely hot (atsume, 43 to 46 degrees), with most facilities offering multiple pools at different temperatures.

This content is for informational purposes only and reflects independent research. Details may change — verify current information before making travel plans.