Here is the moment nobody warns you about.
You have skied since first light. Your legs are gone. There is snow down the back of your neck that has been slowly melting into your soul since about eleven o’clock. You peel off the last frozen layer in a wooden changing room that smells of cedar and sulphur, and a small, kind Japanese grandmother gestures at a door. Beyond it: steam, stone, and a dozen strangers wearing precisely nothing.
This is the part where most Westerners lose their nerve.
Don’t. I’m a bear. I have spent my whole life naked in hot water and I have never once regretted it. Come in. The water’s fine. Better than fine.
The case for the birthday suit
Let’s deal with the elephant, or in my case the bear, in the room. Yes, you take everything off. All of it. No swimming trunks, no clever compromise, no “but back home we—”. The onsen is done in your birthday suit, and I promise you the sky does not fall.
Two things happen once you’re in. First, you realise nobody is looking at you. Genuinely nobody. A Japanese onsen is the least self-conscious place on earth, because everyone is busy doing the thing they came to do, which is dissolve. Second, you realise the towel situation is a con. You get one modesty towel, roughly the size of a tea towel, and it fools absolutely no one. Fold it, put it on your head like everybody else, and get on with your life.
I call this the bare essentials. Strip it back to skin and hot water and the ache leaving your body. It turns out that’s most of what a good day needs.
Wash first. This is not optional.
Before you get anywhere near the big communal bath, you wash. Properly. Sitting down, on a little stool, at a row of taps and hand-showers, scrubbing until you are cleaner than you have been since you were born.
This is the single rule that matters most, so let me be a blunt bear about it: the onsen is not where you get clean. It is where you soak after you are already clean. The bath is shared, unfiltered, and treated as something close to sacred. You do not bring the mountain in with you. Wash the sweat and sunscreen and the day off first, rinse the stool for the next person, and then, only then, lower yourself in.
Do that and you have understood 90% of onsen etiquette. There’s a bit more, and I’ll point you to the grown-up guide in a moment, but wash-first is the whole game.
Why your muscles will write me a thank-you note
I am not a doctor. I am a bear in sunglasses. But the Japanese have been taking the hot-spring cure for well over a thousand years, and they didn’t keep doing it because it was a nice idea.
Here is what a proper soak does after a day on the hill:
- Heat opens you up. Warm water pushes blood to the surface and through tired muscle. The knots you earned on that last mogul run start to let go.
- The water is doing chemistry. Real onsen water is mineral water — sulphur, iron, sodium, magnesium, depending where you are. Different springs feel different on the skin, and the old texts assign each one its own list of ailments it supposedly eases. Believe as much of that as you like. Your legs will believe all of it.
- Weightlessness. For twenty minutes nothing you own weighs anything. After a day of dragging skis and yourself uphill, that alone is worth the trip.
- You sleep like the dead. Warm to the core, then out into the cold mountain air, then bed. There is no better sleep in skiing. I would know. Sleeping is 40% of what I do.
The cleanliness thing runs deep
None of this is a spa gimmick bolted onto a ski holiday. Bathing in Japan is old, and it is bound up with a genuine reverence for cleanliness that goes back to the Shinto idea of washing away impurity. The word onsen just means hot spring, but a country sat on top of a few thousand volcanoes was always going to make something cultural out of all that free hot water.
What that means for you, the nervous first-timer, is that you are not intruding on anything. You are being invited into one of the oldest and most welcoming rituals Japan has. Nobody expects you to have known the rules in advance. Wash, be quiet, be kind, keep the little towel out of the water, and you are one of us.
How it actually goes, start to finish
For the planners among you, here is the whole thing, demystified:
- Shoes off at the entrance. Pay, or show your lift-pass deal if the resort has one.
- Into the changing room, split by gender — blue curtain, red curtain, learn those two kanji fast. Everything into a basket or locker. Everything.
- Take your tiny towel to the washing stations. Sit. Scrub. Rinse yourself and the stool.
- Ease into the bath slowly. It’s hot. Sometimes it’s very hot. More on temperature from a certain monkey I know.
- Soak. Don’t swim, don’t splash, don’t put your head under. Towel on your head or on the side, never in the water.
- When you’re pink and wobbly, get out, pat dry, and go find a cold drink and the best sleep of your trip.
That’s it. That’s the terrifying ordeal.
One bear’s honest opinion
I’ll give you the single thing I actually believe, and I’ll say it plainly.
The naked bit is not the price of admission. It’s the point.
You spend your whole life padded, wrapped, branded, buffered from the world. Skiing is you against a mountain. The onsen is what comes after: no gear, no armour, no phone, no idea what anyone does for a living. Just warm water and worn-out people being quiet together in the steam. Do it once and the shyness burns off in about ninety seconds, and what’s left is the most relaxed you will feel on the entire holiday.
So book the resort with the hot spring at the bottom of the runs. Ski until your legs quit. Then take it all off and get in.
Bare essentials. Trust the bear.
Keep going
- Nervous about getting a detail wrong? Read the grown-up version: Onsen etiquette for skiers — the four rules, tattoos, and where to bathe.
- Want the hot spring at the bottom of the lifts? Here are every Japanese ski resort with an onsen nearby.
- Planning the trip: open the Secret Ski Map and see the whole country at once.
- My friend the snow monkey has opinions about which onsen are best. His three-part guide starts soon — he’s called Yudai and he does not ski.
- And when your legs need a rest day, there’s a small, silly game about hopping between baths. Play Onsen Hop.