Onsen Etiquette: A Gentle First-Timer's Guide (2026)
Updated: 2026-07-30
Quick answer
Hi, I'm Miya — I help newcomers settle into life in Japan, and an onsen (hot spring) is one of my favourite things to send people to. If you've been nervous about going, let me put you at ease: the etiquette is simpler than it looks, and once you know the handful of basics, a soak becomes the most relaxing afternoon you'll have all month.
The whole thing comes down to a few kind habits: wash thoroughly before you get in, keep the water clean and calm for everyone, and go gently. Do that and you'll fit right in — nobody expects you to be perfect, only considerate.
What an onsen actually is
An onsen is a bath filled with natural, mineral-rich hot-spring water. You'll find them as grand resort baths, small neighbourhood spots, and open-air 'rotenburo' baths with a view. A very similar place called a 'sento' is a public bathhouse using ordinary heated water — the manners are almost identical, so everything here works for both.
Baths are almost always split by gender: look for the noren curtains at the entrance, usually red or 女 for women and blue or 男 for men. If you're unsure which is which, that's a great moment to have a translation app open on your phone.
Before you go in: shoes, lockers, and undressing
At the entrance you'll take off your shoes and put them in a shoe locker or shelf. Pay or scan in, then head to the changing room for your gender. There you undress completely — onsen are enjoyed without a swimsuit — and leave your clothes and belongings in a basket or locker.
You'll carry just two things into the bathing area: a small towel (for washing and modesty) and, if you like, a bigger towel that you leave in the changing room to dry off with afterwards. That's it — keep it simple.
The one rule that matters most: wash first
This is the heart of onsen etiquette, so I'll be clear about it. Before you ever step into the shared bath, you wash your body at the seated shower stations along the wall. Sit on the little stool, use the soap and shampoo provided, and rinse off every trace of suds.
The reason is lovely, really: everyone shares the same clean water, so you arrive at the bath already clean. Rinse the stool and area for the next person when you finish. Get this part right and you've mastered the most important thing.
In the water: gentle do's and don'ts
Ease in slowly — the water is hot, often around 40–42°C, and there's no rush. Keep your small towel out of the bath; most people fold it and rest it on their head or set it at the edge. Long hair goes up and out of the water too.
Keep things calm and quiet: no swimming, splashing, or diving, and no soap in the shared bath. If the heat gets to you, step out, cool down, sip some water, and go back in. Listen to your body — a few shorter soaks beat one long dizzy one.
About tattoos
Worth knowing before you travel out: some traditional onsen still ask guests with tattoos not to enter the shared baths, a rule rooted in old customs rather than anything about you. Attitudes are relaxing, especially at newer or tourist-friendly places.
If you have tattoos, you have easy options: look for a 'tattoo-friendly' onsen, cover a small one with a waterproof patch, or book a private family bath ('kashikiri') where you have the room to yourselves. A quick check of the venue's website on your phone saves any awkwardness at the door.
After your soak
When you're done, a light pat-dry with your small towel before stepping back into the changing room keeps the floor dry for everyone. Many people leave the mineral water on their skin rather than rinsing it off — it's part of the treat.
Then comes my favourite ritual: rehydrate. A cold drink from the vending corner, a rest on a bench, maybe a bottle of milk if the place has that old-school charm. Give yourself time before heading back out; you'll feel wonderfully loose and warm.
Turn it into an easy day trip
Some of the best onsen sit an hour or two from the city in hot-spring towns, and they make a perfect, low-effort day out. You'll lean on your phone the whole way: train routes and last-train times, a map from the station, reviews to pick a bath, and that translation app for the curtains and signs.
That's why I like people to be connected before they set off. With Rakuten Mobile you can apply online with just your residence card, and eSIM-capable phones can be running the same day — so you can plan a soak on a whim and just go. Check current terms on the official page before you apply, and I'll be right here for the mobile part.