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♨️ Onsen 101 · Japan Travel

Japanese Onsen — How to Bathe, the Etiquette, and the Tattoo Question

Nervous that an onsen means stripping down in front of strangers, unsure how to act without embarrassing yourself? This page takes you from anxious to confident — from how to bathe step by step, to the etiquette the Japanese live by, to tattoos and picking the right onsen town for you.

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An Onsen Isn't as Scary as You Think —You Just Need a Few Rules

An onsen (温泉) is a natural hot spring that bubbles up from underground, rich in minerals, and it has been at the heart of how Japanese people unwind for hundreds of years. Soaking in hot water out in the open air, surrounded by snow or green forest, is one of those experiences that travellers come home raving about as a must-do. But honestly, almost everyone is nervous about the same thing the first time — do you really have to be 100% naked in front of other people? And how do you act without embarrassing yourself?

Here's the thing: once you know the rules, it's far easier than it looks. This page takes you from anxious to confident — how to bathe, step by step, from walking in to walking out; the etiquette the Japanese take seriously; the water types and their reputed benefits; the tattoo question that worries so many people; and 8 famous onsen towns to match to the kind of trip you want.

♨️ Worried about the naked part? Yes, a communal onsen really is bathed naked — but the baths are always separated by gender, you get a small towel to cover up while walking, and everyone in the bath is focused on relaxing, not on looking at each other. If you're still not comfortable, the answer is to reserve a private bath (kashikiri) or a ryokan with an onsen in the room — you get the full onsen feeling with none of the awkwardness.
🩱
Naked Is Normal
No swimsuits or underwear in the water — everyone is undressed the same way.
🚹🚺
Men & Women Split
Blue noren (青) = men · red (赤) = women. You can't go in the wrong side.
🚿
Always Wash First
Sit and scrub yourself clean at the shower station before getting into the bath, every time.
🧖
Small Towel Stays Dry
The little towel is for drying off and modesty — rest it on your head or the edge, never in the water.
How to Bathe, Step by Step

From Walking In to Walking Out —6 Easy Steps

Read it once and you'll know exactly what to do. The order is the same everywhere, so follow it and you'll blend in like you've been doing this your whole life — no need to feel self-conscious.

STEP 1
Pay, Pick the Noren, Take Off Your Shoes

Pay the entry fee, then read the noren curtain at the entrance carefully — blue (青) is the men's side, red (赤) is the women's side, and you absolutely can't go in the wrong one. Take off your shoes and stash them in the shoe locker before you go in.

STEP 2
Undress Completely in the Changing Room

In the changing room, take off everything and put it in a basket or locker — no swimsuits or underwear in the bath. The only thing you take in with you is the small towel (tenugui), and just that one piece.

STEP 3
Sit and Wash Yourself Clean First

Head to the shower station, sit on the low stool, lather up, shampoo, and rinse off completely before anything else. This is the single most important rule, because the bath is water everyone shares — wash off all the suds before you get in.

STEP 4
Get In — Keep Towel and Hair Out of the Water

Lower yourself in slowly and rest the small towel on your head or the edge of the bath — never dip it in. If your hair is long, tie it up so the ends don't touch the water. Soak still and relaxed — no swimming, no jumping.

STEP 5
Soak in Rounds, Rest and Drink Water

Soak for about 10–15 minutes at a time, then get out to sit and rest and drink water before going back in. Don't push a single soak too long, because the hot water can make you light-headed or faint easily.

STEP 6
Towel Off Before the Changing Room

Before you head back into the changing room, use the small towel to wipe yourself down so you're not dripping — that keeps the changing-room floor from getting soaked — then dry off properly with your big towel at your locker.

💡 First-timer tip: if you're tense about getting the order wrong, just watch the Japanese people around you and copy them. Everyone follows the same sequence, and nobody is staring at you — they're all here to relax, not to catch you out.
Know the Water

An Onsen Isn't Just "Hot Water" —Every Bath Is Different

Japanese hot springs are classified by the minerals dissolved in them, so the colour, smell, and feel vary noticeably — start noticing it and the whole thing gets a lot more fun.

Water typeCharacterSaid to be good forExample towns
SulfurSulfur · 硫黄泉Cloudy yellow/milky white, with an egg-like smellSkin, joints, circulationKusatsu, Noboribetsu
BicarbonateBicarbonate · 炭酸水素塩泉Clear, silky to the touch, leaves skin smooth — "bihada no yu"Smooth, soft skin, relaxationGero
IronIron · 含鉄泉Turns reddish-brown on contact with air — "kinsen" (golden water)Warmth; anemia, by traditionArima
Chloride (salt)Chloride · 塩化物泉Slightly salty, coats the skin and holds warmth for a long timeKeeping warm after the bathKinosaki
Simple/AlkalineSimple/Alkaline · 単純温泉Clear, no strong colour or smell, gentle — good for beginnersGeneral relaxation, gentle on skinCommon in many towns
⚠️ Straight up: the "benefits" listed above are traditional beliefs passed down over time, not proven medical claims. Think of an onsen mainly as a way to relax, de-stress, and ease tired muscles. If you have a health condition, check with a doctor first.
6 Ways to Soak

Onsen Come in Many Forms —Try Them All at Least Once

It's not just one big communal bath. Each style has a completely different feel — some are free, some you book all to yourself. Pick the one that suits you.

An open-air rotenburo bath surrounded by nature in Kurokawa onsen town 🌿 Open-Air Bath1
Rotenburo Open-Air Bath
Rotenburo · 露天風呂

An outdoor bath set against a natural view — green forest, a stream, or snow drifting down in winter. This is the dream onsen image most people picture: soaking in hot water while you breathe in cool air and take in the scenery. As good as it gets.

✨Feel: Nature views + open air, most beautiful in winter
📍Where to find it: Almost every rural onsen town; especially Kurokawa
Choose an Onsen Town →
The historic Arima onsen district, home to traditional indoor baths 🏠 Indoor Bath2
Indoor Bath (Uchiyu)
Uchiyu · 内湯

A bath inside the building — warm, sheltered from wind and rain, ideal on a bitterly cold or rainy day. Many are built from fragrant hinoki cypress or natural stone, with a calm, quiet feel. It's the basic bath every onsen has.

✨Feel: Warm, peaceful, shelters you from wind and rain
📍Where to find it: Every onsen; notably the historic baths of Arima
Kobe (Arima) Guide →
A private onsen bath at a ryokan in Hakone, reservable just for you 🔑 Private Bath3
Kashikiri Private Bath
Kashikiri · 貸切風呂

A private bath you reserve by the hour — no sharing with strangers. Perfect for couples, families, anyone with a tattoo, or anyone still shy about being naked. Many ryokan offer one to book, or even an onsen right in your room.

✨Feel: Private, no awkwardness, great for couples/families
📍Where to find it: Many ryokan; book ahead or grab a slot on the day
Ryokan Guide →
Beppu onsen town, famous for its hot-sand bathing (sunaburo) 🏖️ Sand Bath4
Sunaburo Sand Bath
Sunaburo · 砂風呂

Instead of water, you lie down and an attendant buries you in hot sand warmed by the steam of the hot springs below. It feels heavy and warm, like being tucked in. It's a novel experience that Beppu (especially the Takegawara area) is famous for.

✨Feel: Lie back under warm sand — novel, warming all over
📍Where to find it: Beppu, Oita Prefecture, Kyushu
Beppu Guide →
Gero onsen town, with free riverside foot baths 🦶 Foot Bath5
Ashiyu Foot Bath
Ashiyu · 足湯

A foot bath where you don't undress and don't pay (most are free) — just pull off your socks and dip your feet in. They're usually right in the middle of an onsen town, ideal for first-timers not yet ready for a full soak, or to rest your feet between sights.

✨Feel: Free, no undressing, great for beginners/tired feet
📍Where to find it: In most onsen-town centres; notably Gero, by the river
Gifu (Gero) Guide →
Nyuto Onsen in Akita, famous for its milky white cloudy water 🥛 Milky Water6
Milky Cloudy Water
Nyuto Onsen · 乳頭温泉

Some hot springs run milky white from the dissolved minerals. Nyuto Onsen in Akita is the name onsen lovers bring up — a cluster of historic ryokan deep in the forest, with milky open-air baths and a wonderfully raw, traditional atmosphere.

✨Feel: Milky white water, deep-forest setting, raw and traditional
📍Where to find it: Nyuto Onsen, Akita Prefecture, Tohoku
Akita (Nyuto) Guide →
The Tattoo Question

Can You Go in an OnsenWith a Tattoo?

This is the thing people worry about most. The short answer is "yes, but you have to pick the right place or method" — and there are 3 routes that genuinely work.

🖋️ Why so many onsen ban tattoos: historically, tattoos were associated with the yakuza (Japanese mafia), so many onsen set a no-tattoo rule for the comfort of other guests. The rule isn't about whether your tattoo is beautiful or meaningful — it's purely cultural, and these days it's slowly loosening up.
🩹
Cover It With a Waterproof Patch
Small tattoos can be covered with a waterproof sticker or patch made for the purpose, sold at pharmacies and convenience stores. Some onsen hand them out or sell them at the counter — if it's fully covered, you can usually go in.
✅
Find a Tattoo-Friendly Onsen
Some onsen openly welcome guests with tattoos. Check listings on sites like Tattoo-Friendly Japan, which compile and verify them one by one, so you can book with peace of mind instead of gambling on the day.
🔑
Book a Private or In-Room Bath
The surest route is to reserve a private bath (kashikiri) or a ryokan with an onsen in the room. Soak alone or with your own group, and the tattoo question simply never comes up.
Onsen Etiquette

6 Rules That Help YouFit Right In

Japanese people take communal-bath etiquette seriously, because it's a shared space. Know these six and you'll soak with a clear conscience, without accidentally annoying anyone.

🚫
No Swimsuits
Communal baths are nude — absolutely no swimsuits or underwear in the water (except at certain mixed-gender baths that say otherwise).
🚿
Always Wash First
Sit and lather up, shampoo, and rinse off all the suds at the shower station before every soak. This is the single most important onsen rule.
🧖
Towel Stays Out of the Water
The small towel is for modesty and drying off — rest it on your head or the bath edge, never dip it in the water, since that's considered dirtying the bath.
💇
Keep Hair Out of the Water
If your hair is long, tie it or pin it up so the ends don't dip or float in the bath. Keep the water clean for everyone.
📵
No Photos in the Bathing Area
Don't bring a phone or camera into the bath area and never take photos — everyone is naked, and it's a deeply sensitive matter of privacy.
🤫
Keep It Quiet, No Swimming
An onsen is for relaxing, not a swimming pool. Talk softly, don't swim, jump, or dive, and respect the people who came to unwind.
Map

Famous Onsen TownsAcross Japan on One Map

Onsen towns are scattered from Hokkaido to Kyushu — see at a glance which one is near which major city. Want to dig into each town? Open the guide to 12 onsen towns.

Soak Safely

Before You Get In — 6 Things to Put You at Ease

The water is hotter than you'd expect. Soak with a bit of awareness and you'll relax fully, without going light-headed mid-bath.

💧
Drink Water Before & After
A hot soak makes you sweat and can dehydrate you. Drink enough water both before and after to head off dizziness and faintness.
🍶
Don't Bathe Drunk or Hungry
Never soak after drinking alcohol, and don't go in on a very empty or overly full stomach — it's an easy way to faint in the bath.
⏱️
Soak in 10–15 Minute Rounds
Break it into short rounds of about 10–15 minutes, then get out to rest. Don't push a single soak so long that you feel woozy or your heart races.
🫀
Check With a Doctor If Needed
If you have a heart condition, high blood pressure, or are pregnant, check with a doctor first, and stick to baths that aren't scaldingly hot.
🧴
Bring Your Own Essentials
Onsen usually provide soap and shampoo, but towels are sometimes rented, sold, or BYO (especially at small public baths). Check before you go.
🏙️
Know Sento vs Super-Sento
Onsen = natural hot spring · sento = a town bathhouse using heated tap water (~300–600 yen) · super-sento = a big multi-bath spa complex. The prices differ.
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Read On — Ryokan, Onsen Towns, and Prep

🏯

First-Time Ryokan Guide

What a ryokan is, how you sleep, per-person pricing with meals, kaiseki, wearing a yukata, and the etiquette — your no-confusion guide to a first ryokan night.

Ryokan Guide →
🗾

12 Onsen Towns Across Japan

Pick the onsen town that fits you — near Tokyo, beautiful in the snow, the best water, or quiet and rural — with how to get to each.

Onsen Towns →
♨️

Hakone Guide

The closest onsen town to Tokyo — Lake Ashi, Owakudani, the museums, onsen stays, and how to get there.

Hakone Guide →
🌋

Beppu Guide

The town with the most hot-spring water in Japan — the 8 "hells" (jigoku) tour, sand baths, and every kind of onsen in one place.

Beppu Guide →
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Full Japan Travel Guide

Every region and city, with links into city guides, hotels, and attractions across Japan.

Japan Guide →
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Japan Travel Prep

Visa · eSIM · IC cards · JR Pass · yen · power plugs · Japanese etiquette — everything before you fly.

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Frequently Asked Questions

Questions AboutBathing in an Onsen

Do you really have to be 100% naked in an onsen?
Yes — a traditional communal onsen is bathed naked, and you cannot wear a swimsuit or underwear in the water. But the baths are always separated by gender, and you're given a small towel to cover yourself while walking around (just don't dip it in the water). If being naked in front of others isn't for you, the alternatives are to reserve a private bath (kashikiri) or stay at a ryokan with an onsen in the room.
Can you go in an onsen if you have a tattoo?
Many onsen still turn away guests with tattoos, because tattoos were historically associated with the yakuza. But there are three ways around it: (1) cover a small tattoo with a waterproof sticker or patch sold at pharmacies; (2) choose an onsen that declares itself tattoo-friendly — sites like Tattoo-Friendly Japan list verified ones; and (3) book a private kashikiri bath or a ryokan with a bath in the room, where it's a non-issue.
How is an onsen different from a sento?
An onsen uses natural hot-spring water from underground that contains minerals, as defined by Japan's Onsen Law. A sento is a public bathhouse in town that uses heated tap water, costing roughly 300–600 yen (Tokyo sets it at 550 yen). A super sento is a large spa complex with multiple baths, saunas, restaurants, and massage, and costs more — usually from around 1,000 yen upward.
Can women bathe in an onsen during their period?
By etiquette, it's best to skip the communal bath on heavy-flow days, since it's shared public water and nothing can be worn in it. If you really want to soak, the courteous options are to reserve a private bath (kashikiri) or choose a ryokan with an onsen in the room, so you can relax without any worry.
Do mixed-gender onsen still exist?
Most onsen in Japan clearly separate the men's and women's baths — look at the noren curtain at the entrance: blue (青) is the men's side, red (赤) is the women's. Mixed-gender baths (konyoku) are now very rare, found only in some rural areas or certain outdoor baths, so in general you don't need to worry about ending up in one.
How long should you stay in an onsen?
Soak in rounds of about 10–15 minutes, then get out to rest and drink water before going back in. Don't push it for too long at once, because the hot water can make you dizzy or faint. Drink water before and after, don't bathe drunk or on a very empty stomach, and if you have a heart condition, high blood pressure, or are pregnant, check with a doctor first.
Ready to Soak?

Pick the Right Onsen Town
and Hit the Road

You know how to bathe and the etiquette — now just choose a town: near Tokyo, beautiful in the snow, the best water, or quiet and rural. Browse the 12 onsen towns, then book a well-placed stay before they fill up.

🗾 See 12 Onsen Towns 🏨 Search Onsen Stays →
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