Onsen Etiquette for Skiers & Snowboarders
Your legs are cooked. Your toes went numb somewhere around lunch. Somewhere nearby, a pool of volcanic hot water is steaming quietly into the snow, waiting for you.
The onsen (natural hot spring bath) is the best après in Japan, and we will fight anyone who says otherwise. It's also the bit of the trip that makes first-timers nervous, mostly because of one word: naked. Let's get the awkward stuff out of the way first.
Do you really have to get naked?
Yes. Completely. Nobody cares.
Swimmers stay in your bag, and so does your dignity. Men and women bathe separately, everyone is in their birthday suit, and the locals have seen every shape of human there is. Within about ninety seconds you'll stop thinking about it, which is roughly when your shoulders start to melt.
Still can't face it? Book a kashikiri (a private bath you hire by the hour) at your hotel or ryokan, which is also the easy answer for couples and families. Or dip your feet in an ashiyu (free street-side foot bath) and work up to the main event.
What about tattoos?
It depends on the bath.
Tattoos were long linked to the yakuza (Japan's organised crime gangs), so some onsen still turn them away. Plenty don't, especially in ski towns full of inked Aussies and Kiwis, and the rules are loosening every year. Small tattoos can often go under a skin-coloured cover sticker. Big sleeves are safest in a tattoo-friendly bath or a private one. When in doubt, ask your hotel to ring ahead. Nobody minds the question, and it beats the walk of shame back to the change room.
The rules
Shoes off at the door. Find the right curtain: 男 means men and 女 means women, and some places swap sides overnight, so check every time. Strip off, then wash before you soak: sit on the little stool, scrub everything and rinse off every bubble. The small towel goes on your head or the edge, never in the water. Tie long hair up. Leave the phone in the locker, keep the volume down, and don't swim, dive or do your best whale impression. The water is usually north of 40°C, so ease in, and get out when your face goes the colour of a tomato. Dry off before you drip back into the change room, then grab a bottle of coffee milk from the fridge. That last one isn't a rule, but it should be.
What's in the water?
Onsen water bubbles up from deep underground and picks up whatever minerals it passes on the way. Every bath has an official analysis sign on the wall, usually in dense Japanese, so point your phone's translate app at it. Or just use your eyes and nose:
| If it looks or smells like... | It's probably... |
|---|---|
| Crystal clear, nothing much | A simple spring, gentle and easy |
| Milky white or blue, rotten eggs | Sulphur, the classic mountain onsen |
| Rusty orange or brown | Iron, which stains towels and looks wild |
| Clear, but tastes salty | Chloride, which keeps you warm for hours |
| Tiny bubbles on your skin | Carbonated, soft and fizzy |
Strong sulphur and acidic springs can sting on sensitive skin or fresh shaving nicks. If it tingles too much, rinse off and find a milder pool.
Can men and women bathe together?
Rarely. Konyoku (mixed baths) survive in a few old mountain spots, and Tsurunoyu in Nyuto Onsen is the famous one, with its milky outdoor pool under a thatched roof. Some let women wear a bath wrap, so check the rules before you go. Everywhere else, couples split at the curtains and reunite in the lounge, smelling faintly of eggs.
Onsen FAQs
Can kids come?
Yes, and local kids are everywhere. They follow the same rules, including the wash first. Babies still in nappies usually can't use the shared baths, so a private bath is the move with little ones. Planning a family trip? Our family ski trip to Japan guide has the rest.
What if I'm on my period?
Most women skip the shared baths and book a private one for those days. Policies vary, so ask quietly at reception.
Is an onsen the same as a sento?
Not quite. An onsen uses natural hot spring water, while a sento (public bathhouse) heats ordinary tap water. The manners are identical, and a sento is usually cheaper.
Where to soak
Some ski towns are basically onsen with lifts attached. Nozawa Onsen has thirteen free public bathhouses dotted through the village, Zao Onsen comes with steaming sulphur baths and snow monsters, and Kusatsu pumps so much scalding water that it runs it through wooden channels in the middle of town just to cool it down. Our list of the best onsen ski resorts in Japan has the full lineup, and the Southern Tohoku road trip strings a few together.
Want a hot spring on tap? Book a ryokan, a traditional inn where the bath is half the point and dinner is the other half.
The Japow verdict
Wash first, strip off, towel on your head, phone in the locker and voice down. Check the tattoo rules, follow your nose to the sulphur, and don't overthink it. Ten minutes in, you'll wonder why every country doesn't do this. Then go find dinner, which is the other best part of the day. Izakaya 101 will point you to it.