Visiting an onsen is one of Japan.s, most memorable travel experiences: hot spring water, quiet bathing rooms, outdoor rotenburo baths, mountain inns, seaside views, and a slower rhythm than sightseeing in the city. It can also feel intimidating the first time because the rules are different from a swimming pool, spa, or hotel bath in many countries.
The core idea is simple: wash your body before entering the shared bath, keep towels out of the water, respect the facility.s, rules, and treat the space as quiet and communal. This guide explains the full flow so you can enjoy an onsen without worrying about every small detail.
Quick answer: the basic onsen steps
Remove your shoes where required, enter the correct changing room, undress fully, wash and rinse your body at the shower area, tie up long hair, enter the bath slowly, keep your towel out of the water, relax quietly, dry lightly before returning to the changing area, and follow the facility.s, rules about tattoos, swimwear, photography, and mixed bathing.
Most mistakes come from treating an onsen like a pool. In a standard public hot spring bath, you do not wear swimwear unless the facility specifically says so, you do not soap yourself in the bath, and you do not put towels into the shared water.
Before you enter: shoes, payment, and changing rooms
Many Japanese bathing facilities begin with a shoe area. You may need to remove your shoes at the entrance and place them in a locker or shelf. This fits a wider Japanese habit of separating outdoor shoes from clean indoor spaces. For more background, see our guides to why Japanese people take off shoes and Japanese bathroom slippers.
After paying or checking in, look for the correct changing room. In many facilities, the curtains are color-coded and marked in Japanese and sometimes English. If you are unsure, ask staff before entering. Do not wander into a changing area to check.
Place your clothes and belongings in a locker or basket. Bring only the small towel and any allowed toiletries into the bathing area. Valuables should be stored according to the facility.s, system, not left loose in an open basket.
No swimwear unless the facility says so
In a standard onsen or sento-style public bath, people bathe nude. Swimwear is usually not worn because the bath is for soaking after washing, not swimming. There are exceptions: some mixed-gender outdoor baths, hotel spa zones, water parks, or tourist-oriented facilities may require or allow swimwear. The facility.s, rule is what matters.
If you are uncomfortable bathing nude, consider a private bath, a room with an open-air bath, or a facility that clearly offers swimwear areas. Do not wear swimwear into a normal bath “just in case. It may be against the rules and can confuse other guests.
Wash before entering the bath
This is the most important rule. The large bath is for soaking, not washing. Before entering, sit at a shower station or washing area, wash your body thoroughly with soap, shampoo if needed, and rinse completely. Make sure no soap remains on your body before entering the hot spring water.
Many washing stations have a small stool, basin, shower hose, mirror, and provided soap or shampoo. Sit while washing if stools are provided. Standing and spraying water around can annoy people nearby. Keep your shower area tidy and rinse the stool and basin after use.
If you are staying at a ryokan, your room may have towels and instructions. At public baths, towel rental or purchase rules vary. Check before entering so you do not realize too late that you have no towel.
What to do with the small towel
The small towel is for modesty while walking and for drying sweat or water from your face. It should not go into the shared bath water. Many people fold it and place it on their head, leave it beside the bath, or keep it on a nearby rock or edge where allowed.
Do not wring the towel into the bath. Do not wash it in the bath. If it accidentally touches the water briefly, do not panic, but avoid making it a habit. The etiquette exists to keep the shared water clean.
Hair, soap, and cleanliness
Long hair should be tied up so it does not touch the bath water. Even clean hair in shared water can feel unpleasant to other bathers. If you have hair products, rinse well before soaking.
Never bring soap, shampoo, or shaving foam into the bath itself. Use those only at the washing area. If you shave, check whether the facility allows it and clean the area carefully afterward.
People often rinse once more before entering the bath, especially if they have been using shampoo or body soap. This extra rinse is a good habit and shows respect for everyone sharing the water.
Entering the bath
Hot spring water can be hotter than visitors expect. Enter slowly. Splash a little water on your body first if locals are doing so, especially around your legs and shoulders. Sit on the edge briefly if needed, then lower yourself in gradually.
Do not jump, swim, splash, or dunk your head. Onsen baths are for quiet soaking. Keep conversation low, avoid taking up too much space, and be aware of people entering or leaving.
If you feel dizzy, overheated, or uncomfortable, leave the bath slowly and sit somewhere safe. Do not force yourself to stay because you think there is a correct amount of time. Hydration matters, especially after travel, alcohol, or a long day of walking.
Indoor baths and outdoor rotenburo
Many onsen have indoor baths and outdoor baths called rotenburo. The basic rules are the same: wash first, no towels in the water, no swimming, and keep voices down. Outdoor baths may have stone paths, cold air, rain, snow, or slippery surfaces, so move carefully.
In outdoor baths, avoid standing in exposed places longer than necessary. Even when the view is beautiful, remember that the bath is shared. Sit, soak, and enjoy the atmosphere without turning it into a photo spot.
Photography and phones
Do not use phones or cameras in changing rooms or bathing areas unless the facility explicitly allows photography in a private space. This is a privacy issue, not just an etiquette preference. Even if no one is visible, people may feel uncomfortable seeing a phone in the bath area.
If you want memories, take photos of the exterior, your room, the meal, or public areas where photography is allowed. Never photograph other guests without permission.
Tattoo policy caution
Tattoo rules vary widely. Some onsen do not allow guests with tattoos, some allow them if covered, some offer cover stickers, some allow tattoos in private baths, and some are tattoo-friendly. The policy depends on the facility, not on a single national rule.
If you have tattoos, check the official website or contact the facility before visiting. Do this before making a long trip to a remote hot spring. If a facility says tattoos are not allowed, do not argue at the front desk. Choose a private bath or a tattoo-friendly place instead.
Ryokan onsen vs public bath
A ryokan onsen is often part of an overnight stay. You may receive a yukata, towel set, meal schedule, and bath instructions. Some ryokan have gender-separated public baths, private reservable baths, or in-room baths. Rules still matter, but staff may be used to explaining them to guests.
A public bath or day-use onsen may be more local and less tourist-oriented. You may need to bring or rent towels, handle lockers, and follow posted rules with less English support. This is not a problem if you understand the basic flow.
Sento are public baths that may use heated tap water rather than natural hot spring water, while onsen use natural hot spring sources under Japanese definitions. For etiquette, the washing-first and shared-bath manners are very similar.
After-bath manners
Before returning to the changing room, wipe excess water from your body with the small towel. You do not need to be completely dry, but you should not drip water all over the changing room floor. Use the larger towel at your locker or basket area.
Return borrowed items where instructed. Keep sinks and hair-dryer areas tidy. Do not occupy a hair dryer or mirror space longer than necessary if people are waiting.
After bathing, drink water and rest. Many facilities have a relaxation area, vending machines, milk drinks, or simple seating. If you are using vending machines, an IC card may work in some places, but cash is still useful. See our Japanese vending machines guide and Suica and Pasmo guide for payment basics.
Eating, drinking, and alcohol
Avoid entering an onsen when drunk. Hot water and alcohol can be a bad combination, increasing the risk of dizziness or fainting. If you have a large meal, alcohol, or feel unwell, wait and use common sense.
Food is not brought into the bath area. Eat in designated restaurant, room, or rest areas. At a ryokan, bathing before dinner or after dinner can both be enjoyable, but avoid rushing from a heavy meal straight into very hot water if your body feels uncomfortable.
Common mistakes to avoid
- Entering without washing: always wash and rinse first.
- Putting the towel in the bath: keep it out of the shared water.
- Wearing swimwear in a normal onsen: only do this if the facility says it is allowed or required.
- Letting hair touch the water: tie up long hair.
- Using a phone in the changing area: respect privacy completely.
- Ignoring tattoo rules: check the policy before you go.
- Staying too long in hot water: leave slowly if you feel dizzy or overheated.
Useful Japanese manners around the bath
Onsen etiquette connects to broader Japanese ideas of shared spaces, cleanliness, and quiet consideration. You may hear or use simple phrases like “sumimasen if you need to pass someone, or “arigatou gozaimasu when staff help you. Our guides to sumimasen and arigatou explain these everyday words in more detail.
At ryokan meals, you may also hear phrases like “itadakimasu before eating and “gochisousama after finishing. If your hot spring stay includes dinner or breakfast, our itadakimasu guide and gochisousama guide can help you understand the cultural nuance.
FAQ
Do I have to be naked in an onsen?
In a standard gender-separated onsen bath, yes, guests usually bathe nude. Swimwear is only used if the facility specifically allows or requires it.
Can I enter an onsen with tattoos?
It depends on the facility. Check the official policy before you go. Some allow tattoos, some require covers, and some do not allow them in public baths.
Do I wash before or after the bath?
Wash and rinse thoroughly before entering the shared bath. You can rinse again afterward if you like, but the essential rule is washing first.
Can I put my towel on my head?
Yes, many people do this with the small towel. Just keep it out of the bath water.
Can I take photos in an onsen?
Do not take photos in changing rooms or shared bathing areas. Privacy is extremely important. Only take photos where the facility clearly allows it.
What if the water feels too hot?
Enter slowly and leave if you feel dizzy or uncomfortable. Do not force yourself to stay. Rest and drink water afterward.
Are ryokan baths different from public baths?
The setting may be more traditional or guest-focused, but the main etiquette is similar: wash first, no towels in the water, keep quiet, and follow posted rules.
