Japanese Onsen Etiquette: Do’s and Don’ts Explained

The first time I stood outside an onsen changing room in Japan, I genuinely froze. I had no idea what I was about to walk into, what I was supposed to do, or whether I was seconds away from embarrassing myself in front of a room full of strangers.

No one warned me it would feel this nerve-wracking. But nobody told me how good it would feel either.

If you’re planning your first onsen visit and feeling a little anxious about the rules, this onsen etiquette guide covers everything: what to do, what not to do, and the things I really wish someone had told me before I walked through that curtain.

No swimsuit. Seriously, none.

This is the rule that catches almost every first-time visitor off guard.

In a traditional Japanese onsen, you bathe completely nude. No swimsuit, no shorts, nothing. I know that sounds confronting on paper. It did for me too.

But the moment you’re actually in the water, steam rising around you, mountain views through the window, it stops feeling like a big deal remarkably fast. Nobody is looking at you. Everyone is just there to soak.

The routine is simple. Change in the locker room, leave your clothes in a basket or locker, and head into the bathing area. That’s it.

But if bathing with strangers on your first visit feels like a step too far, a private onsen bath is the perfect solution.

Ryokans like Hakone Kowakien Ten-yu and Yufuin Baien Ryokan offer private hot spring baths where you can enjoy the full onsen experience entirely on your own terms. For many first-time visitors, this is the best way to start.

Find the right door first

This sounds minor until you’re standing at the entrance trying to figure it out in a hurry.

Onsen bathing areas are separated by gender. The curtains at the entrance are colour-coded: blue for men, red for women.

The kanji to know are 男 (otoko) for male and 女 (onna) for female.

Most facilities have both symbols displayed clearly, but in smaller, older bathhouses, it’s sometimes just the kanji on its own.

Wash before you soak

Along the wall of every onsen bathing area, there’s a row of individual stations, each with a stool, handheld shower, soap, and shampoo.

You sit down, wash your hair and body thoroughly, and rinse everything off before you step anywhere near the communal bath.

What I didn’t realise at first is that it’s the soap residue that really matters, not just being generally clean. Get it all off before you move to the bath.

It takes a few minutes and feels a bit unfamiliar the first time, but after a few visits, it becomes one of my favourite parts of the whole experience. A quiet few minutes to slow down before you get in.

Keep your towel out of the bath

Bringing a small towel into the bathing area is optional. Plenty of people don’t bother, and that’s completely fine.

If you do bring one in, just don’t let it touch the water. Leave it folded on the edge of the bath, or hold it.

Some people balance it on their head because there’s nowhere obvious to put it, which makes total practical sense even if it looks a bit funny. You’ll figure out your own system pretty quickly.

Tattoos can be tricky

Some traditional onsens still prohibit tattoos, a policy linked historically to Japan’s yakuza culture.

The rules are slowly shifting, especially in areas that see a lot of international visitors, but it’s not universal.

And it’s worth knowing that most onsens apply all-or-nothing policies regardless of tattoo size, so don’t assume a small tattoo will be overlooked.

Before you go, check the onsen’s website or search their name in Google Maps reviews and look for mentions of tattoos. It usually gives you a clear answer fast.

Waterproof cover stickers are available at most Japanese drugstores if you need them.

Or skip the worry entirely. A ryokan with a private onsen bath means tattoo restrictions simply don’t apply, and you get the full experience without any of the uncertainty.

Keep the noise down

Onsens are quiet places. Not library-silent, but close.

A soft conversation with a friend beside you is fine. Loud laughter, splashing, phone calls, anything that cuts through the atmosphere is going to bother the people around you.

Part of what makes a good onsen experience is the stillness. Think of it less like a pool and more like a warm, peaceful space where everyone has silently agreed to leave the outside world alone for a while.

Tie up long hair

If your hair is long enough to fall into the water, tie it up before you get in.

I forgot this my first time and got a quiet, polite reminder. It was enough to make me keep a hair tie in my bag ever since. The idea is straightforward: keep the shared water clean.

Don’t bring your phone inside

This is a firm rule, not a suggestion. Phones are off-limits inside the bathing area, and not just because of photos, which are strictly prohibited.

Even typing quietly in the corner feels wrong because it disrupts the atmosphere everyone around you came looking for.

It’s one of my favourite things about onsen culture. For thirty or forty minutes, you’re just in the water with no notifications and no scrolling.

I always come out feeling noticeably calmer, and I think leaving the phone behind is a big part of why.

Don’t stay in too long

The water in most onsens sits between 40 and 42 degrees Celsius, which is hotter than it sounds when you’re in it for a while.

Most people soak for around ten to fifteen minutes, get out to cool down, then get back in.

Staying submerged for too long is how you end up lightheaded or dizzy, especially if it’s your first time.

If you start feeling flushed or a little off, get out slowly, sit on the edge for a minute, and drink some water before getting back in.

The bathing area floor is also worth being careful on. The mineral content in the water makes the tiles slippery. Walk slowly, especially when you first get up.

Be careful with alcohol

Hot onsen water and alcohol before you get in raises your risk of thrombosis.

After your soak, alcohol dehydrates a body that’s already lost a fair amount of fluid from the heat. It’s just not a good combination on either side.

What actually works: drink a glass of water before you get in, and then after you’re dried off and dressed, get something cold from the vending machines that are almost always sitting right outside the bathing area.

Coffee milk or fruit milk is the classic post-onsen drink in Japan.

I know that sounds like a strange thing to get excited about, but that first cold sip after forty minutes in 42-degree water is one of the best things.

A few more things worth knowing

Jewelry: Sulfurous onsen water can tarnish silver and dull gold quickly. Leave rings, necklaces, and bracelets in your locker. I learned this the hard way with a silver ring I was attached to.

Grooming: The bathing area isn’t a personal bathroom. Shaving, clipping nails, that kind of thing belongs back at your locker, not in a shared space.

Don’t stare: Everyone around you is nude. The unspoken agreement is simple: eyes on the water, the steam, or the view. It’s the kind of mutual respect that makes communal bathing feel easy rather than awkward.

For women: Most onsens ask that you skip the bath during your period out of consideration for shared water.

After eating: Give yourself at least thirty minutes between a big meal and getting into the bath. Hot water and a full stomach is an uncomfortable combination that catches people off guard more than you’d expect.

Before you leave the bath

When you’re done soaking, give yourself a quick wipe-down at the edge of the bath before you walk back into the changing area.

You don’t need to be fully dry, just not dripping across the floor. The big towel for a proper dry-off is waiting at your locker.

If you used a stool or bucket at the washing station, rinse it off and leave it tidy. It takes ten seconds, and it’s one of those small habits that makes the whole shared space feel like it’s being looked after.

Ready to experience it yourself?

Onsen etiquette looks like a long list written out like this. In practice, it comes down to one thing: the water is shared, so everyone keeps it clean, keeps it quiet, and lets everyone else have the experience they came for.

Once you’ve done it once, none of this feels like rules anymore. It just feels like the way things are done.

If you’re planning your first onsen stay, a ryokan is by far the best way to do it. The bath is there at your own pace, meals are included, and the whole rhythm of a ryokan stay makes the onsen feel like part of something rather than a standalone activity you have to figure out.

Browse our guides to the best ryokans with private onsen in Japan and start planning your stay.