Onsen Etiquette for Beginners: A Calm, Step-by-Step Guide

The rules of an onsen fit on an index card. Wash before you get in. Go in naked. Keep your towel and your hair out of the water. Leave your spot clean for the next person.

That’s most of it. The hard part for first-timers isn’t the rules, it’s the nerves. And those fade faster than you’d expect, usually somewhere around minute three of your first soak.

This guide walks you through the whole routine in order, from the moment you leave your ryokan room to the moment you shuffle back in your slippers.

First, What You’re Actually Walking Into

An onsen is a natural hot spring bath. Japan has roughly 25,000 hot spring sources and around 3,000 establishments using geothermally heated water, so if you’re staying at a ryokan in an onsen town, there’s a good chance the bath downstairs is fed by one of them. Under Japanese law, water has to come out of the ground at 25°C or more to count. Water that’s artificially heated or has minerals added gets a different label: jinkō-onsen, or artificial hot spring.

You’ll see two basic setups:

• Uchiyu: indoor baths, usually in a tiled or wooden room next to the washing area.
• Roten-buro (sometimes called noten-buro): outdoor baths, often with a view. The traditional onsen is an outdoor one.

Most onsen sit inside ryokan or hotels and are only open to guests, though some sell day passes. Hotel and ryokan baths are generally open 24 hours, or close briefly for cleaning. That matters more than it sounds, and we’ll come back to it.

One more thing: ryokan baths don’t usually have an attendant at the entrance. Nobody will check that you’re doing it right. Which is freeing, but it also means you need to know the routine before you walk in.

Which Bath Is Which

Mixed bathing, known as kon’yoku, is banned in public baths. That’s been the direction since the Meiji Restoration, which ended the old tradition of men and women bathing together. The legal exception is the private family bath, which you book for your own group.

The Bathing Routine, Step by Step

1. Walk down in your yukata

Your ryokan will give you a yukata (a light cotton robe) and indoor slippers. Wear them to the bath. Nobody dresses up for this, and you’ll see other guests padding down the hall in exactly the same outfit. Left side over right when you wrap the yukata; the reverse is how bodies are dressed for funerals, so it’s the one yukata mistake worth avoiding.

Leave your phone, jewelry and anything valuable in your room. Bath areas aren’t the place for them, and phones near naked strangers are a hard no.

2. Pick the right curtain

Men’s and women’s areas are marked by noren, the fabric curtains hanging over each entrance. The kanji to know: 男 for men, 女 for women. Colors often help (blue for men, red for women is common), but read the character rather than trusting the color. Some ryokan swap the men’s and women’s sides at certain hours so everyone gets to try both baths, so check again if you go back later.

3. Undress completely in the changing room

Take off your slippers where others have left theirs, then head inside. You’ll find baskets or lockers. Everything comes off: yukata, underwear, all of it. Swimsuits aren’t allowed in onsen baths or showers. The only place you’d wear one is a modern mixed pool, which is a different thing.

Leave the big towel in your basket. Take only the small towel into the bath hall.

4. Wash, properly, before you touch the water

This is the rule that matters most. The bath is for soaking, not cleaning, so you scrub up first at a wash station.

Each station has a low stool, a faucet or handheld shower, a rinsing basin, and usually free soap and shampoo. Sit down (standing and spraying is how you splash your neighbor), wash your body and hair thoroughly, and rinse off all the suds.

Then rinse the stool and the basin, and splash away any soap around your spot. The next person will thank you silently.

5. Put your hair up

Hair shouldn’t touch the bath water. If yours is long enough to reach, tie it up or clip it before you get in.

6. Ease in, and park the small towel

Get in slowly. The water can be hotter than a home bath, and lowering yourself gradually is just sensible. Your small towel never goes in the water. Fold it and set it on your head, which is what plenty of locals do, or leave it on the edge of the bath.

7. Soak quietly

No swimming, no diving, no dunking your head. Keep conversation low. Short soaks with breaks are smarter than one marathon session, especially in the hottest pools. Drink some water before and after, and skip the bath if you’ve had a lot of sake at dinner.

8. Finishing up

Here’s the question everyone asks: do you shower again afterward? Many onsen bathers don’t. They skip the rinse so the minerals stay on their skin. It’s your call. If the water is strongly sulfurous and you don’t want to smell like it at breakfast, a quick rinse is fine.

Before you walk back into the changing room, wipe yourself down with the small towel so you’re not dripping on the floor. Then dry off properly with the big towel, put your yukata back on, and head to your room.

The Towel Question, Settled

Two towels, two jobs.

• The small towel comes into the bath hall with you. You can use it as a washcloth, hold it in front of you as you walk if you like, rest it on your head while you soak, and use it to dry off before going back to the changing room. It stays out of the bath water.
• The big towel stays in your basket and is for drying off properly once you’re out.

Towels are provided, so you don’t need to pack them. Just don’t take them home or grab a stack. If you’re doing a day trip to a public bath house, bringing your own small towel is a good idea in case they charge for one.

What Not to Do

The short list of things that will actually get you looks:

• Getting into the bath without washing first
• Wearing a swimsuit, underwear or anything else
• Dipping your towel in the water
• Letting your hair float in the bath
• Leaving soap, hair or a mess at your wash station
• Swimming, splashing or putting your head under
• Bringing a phone or camera into the bath area
• Talking loudly, especially late at night
• Taking towels back to your room or home with you

That’s it. You won’t be scolded for picking the wrong stool.

How to Handle the Nerves

Almost every first-timer from the US, UK, Canada or Australia feels some version of this. Here’s what helps.

Nobody is looking at you. This sounds like something people say, but it’s genuinely true in an onsen. Bathing nude is ordinary in Japan, and people are there to relax, not to inspect strangers. The fastest way to feel normal is to act normal.

Go when it’s quiet. Because ryokan baths are usually open around the clock, you can pick your moment. Bath times can get crowded, typically in the evening after dinner. Very late at night or early in the morning, you may have the whole place to yourself, which is a gentle way to learn the routine.

Book a private bath. If communal bathing is a real barrier, a kazokuburo solves it. You reserve a time slot and bathe with your partner, family or alone. Popular or specialty baths can need reservations or carry an extra fee, so ask when you book, especially in peak seasons.

Watch first. Sit at a wash station, take your time, and see how others move through the room. You’ll pick up the rhythm in a couple of minutes.

Ask about tattoos and kids before you go. Policies vary between properties, so check the tattoo rules and whether young children can use the shared baths when you book. Families with small kids often find a private bath simply easier.

Mind your skin. If you have a skin condition or sensitive skin, mineral-rich water may not agree with you. Start with a short dip and see how you feel.

A Quick Word on Water Types

Not all onsen water is the same, and part of the fun is noticing the difference. The main types you’ll come across:

• Sulfur (iō-sen): the classic rotten-egg smell. Strong, distinctive, and the one most people picture.
• Sodium chloride (natoriumu-sen): salty water.
• Hydrogen carbonate (tansan-sen): often described as smooth on the skin.
• Iron (tetsu-sen): tends to have a reddish-brown tint.

Onsen have been used in Japan for at least 1,300 years, originally for healing and religious purposes. There’s even a word, tōji, for the old practice of bathing for long stretches to treat ailments. Treat that as history and tradition, not a prescription. Most people today go simply because it feels great.

Where to Put This Into Practice

You’ll recognize an onsen by the ♨ symbol on signs and maps. Onsen towns like Kusatsu, Hakone, Beppu and Arima are among the most popular, while Gero, Yudanaka and Kinosaki are known for their traditional architecture. These towns tend to sit in mountains or countryside, and often mix ryokan, hotels and public bath houses within walking distance of each other.

If you’re nervous, a ryokan with its own bath is the easiest start: you can go at odd hours, in your yukata, and retreat to your room in seconds. Once you’ve got the routine down, a public bath house in an onsen town is a nice next step. Some towns even have unusual options like sand bathing.

Your Pre-Bath Checklist

• [ ] Phone, jewelry and valuables left in your room
• [ ] Yukata on, left side over right, slippers on
• [ ] Small towel in hand
• [ ] Long hair tie or clip ready
• [ ] Glass of water before you go
• [ ] Correct noren checked (男 men, 女 women)
• [ ] Fully undressed, big towel left in the basket
• [ ] Washed and rinsed, seated, at a wash station
• [ ] Stool and basin rinsed for the next person
• [ ] Towel on your head or on the edge, never in the water
• [ ] Dried off with the small towel before re-entering the changing room
• [ ] Private bath reserved in advance if you want one

Get through it once and the second bath feels completely different. By the third, you’ll be the one quietly showing a nervous newcomer where the shampoo is.

Frequently Asked Questions

Do you wear clothes or a swimsuit in an onsen?

No. You go in completely nude, both in the bath and at the wash stations. Swimsuits are only worn at modern mixed pools, which aren't traditional onsen. You can carry a small towel to hold in front of you as you walk, but it stays out of the water.

Are onsen always separated by gender?

Shared public baths are separated, with noren curtains marking the men's and women's entrances, and mixed bathing is banned in public baths. The exception is the private family bath (kazokuburo), which you reserve for your own group, so couples and families can bathe together there.

Should I shower again after soaking in an onsen?

It's optional. Many bathers skip a final rinse so the minerals stay on their skin. If the water is strongly sulfurous or your skin feels irritated, a quick rinse is perfectly fine. Either way, dry off with your small towel before walking back into the changing room.

What is not allowed in an onsen?

Getting in without washing first, wearing swimwear, putting your towel in the water, letting your hair touch the water, swimming or splashing, using a phone or camera, and leaving a mess at your wash station. Towels provided should also stay at the bath rather than going home with you.

Can I use an onsen if I'm not staying at the ryokan?

Sometimes. Most onsen are inside ryokan or hotels and reserved for guests, but some offer day passes, and onsen towns often have public bath houses open to visitors. Check with the property before you go.

How we research: this article is based on the property's official information, reference sources and an analysis of publicly available guest reviews. We have not been paid by the property. Prices, plans and policies change, so confirm details on the official site before booking.