Etiquette & CustomsBy Clever Tourists · Published
Soaking in a Japanese natural hot spring (onsen) or neighborhood sento is one of Japan's most restorative rituals, but the strict cultural protocol can feel intimidating for first-time visitors. From washing thoroughly before entering the mineral pools to understanding tattoo restrictions, here is everything you need to know to bathe with confidence.
In Japan, communal onsen baths are solely for soaking and relaxation, never for washing. Before taking a single step into the hot mineral spring, sit down at one of the wash stations lined with stools, basins, and shampoo pumps.
Scrub your body completely from head to toe, rinse away every trace of soap and suds, and tidy your station before stepping into the baths. Entering the mineral water unwashed or with soapy residue is the single biggest faux pas an international traveler can make.
You are given a small modesty towel (tenugui) upon entry. While you can hold this towel in front of your body when walking between wash stations and pools, it must never touch or soak in the communal hot spring water.
Fold the damp towel neatly and balance it on top of your head while soaking, or place it on a clean rock ledge along the perimeter of the bath. If your towel accidentally slips into the pool, wring it out immediately at the wash station, never back into the bath.
Historically associated with the yakuza syndicate, tattoos remain widely prohibited in municipal public baths and traditional ryokan onsen across Japan. However, policies have modernized significantly in major travel hubs like Tokyo, Kyoto, and Beppu.
If you have discrete ink, skin-colored waterproof tattoo stickers or rash guards are readily accepted. For travelers with extensive or full-body tattoos, book a traditional ryokan with a private en-suite hot spring bath (rotenburo) or reserve a private family bath (kashikiri-buro) for complete privacy without restriction. Note that while onsens restrict ink, shrines and temples do not — see our guide to What Is the Dress Code at Temples and Shrines in Japan and South Korea? for clothing, tattoo, and shoe rules at sacred sites.
Onsen waters are volcanically heated and typically range from 40°C to 43°C (104°F to 110°F). Ease your body into the water gradually rather than splashing in, and avoid prolonged submersions that induce lightheadedness. Take breaks on wooden benches beside the bath.
Keep footwear strictly outside the changing room, tie long hair above the water line, and pat your body dry with your modesty towel before stepping from the wet bath area back onto the tatami or woven bamboo mats in the locker room.
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