My first onsen experience nearly ended before it started. I was in Hakone, at a small ryokan with an outdoor rotenburo that overlooked the valley, and I walked confidently into the changing room before realizing I had absolutely no idea what I was doing. There was a basket for clothes, a small towel, a row of washing stations, and a wooden door to the pool. It seemed simple. I also had a small tattoo on my forearm and wasn’t sure if that was going to be a problem.
It wasn’t, as it turned out — but the experience taught me how much I didn’t know. Japanese onsen have a specific set of procedures that everyone around you already knows, and deviating from them in the wrong way is genuinely awkward. This is everything I wish someone had told me before that first session.
What Is an Onsen, and Why Do People Make Such a Big Deal About It?
An onsen is a natural hot spring bath heated geothermally — Japan sits on a volcanic archipelago, and the country has more than 27,000 hot spring sources. The water at different locations contains different mineral compositions: sulfur, sodium, iron, calcium, and others. Onsen regulars often have preferences for specific mineral profiles and the physical effects they produce.
But the cultural significance goes beyond the minerals. Bathing together — unclothed, in a shared space — is a communal practice that strips away status markers. The office worker and the executive are both just soaking. It’s an unusual form of social leveling in a society with clear hierarchies, and it’s been central to Japanese life for centuries.
For visitors, it’s one of the most genuinely immersive experiences available in Japan. You don’t need to speak Japanese. You don’t need any particular skill. You just need to know the procedure.
What Is the Rule About Tattoos?
This is the question everyone asks, and the honest answer is: it depends on the facility.
The traditional policy at most public bathhouses and onsen is no tattoos, full stop. The rule has roots in the association between tattoos and organized crime (yakuza) in Japan, and many onsen have maintained it even as tattoo culture has shifted.
In practice, enforcement varies enormously:
- Large public sento and bathhouses in cities: often strict, with signs at the entrance and staff who will ask you to leave.
- Ryokan with private onsen: usually relaxed or unenforced, especially if you book a private rotenburo (outdoor bath) for your room or as a reserved session.
- Resort onsen: increasingly tattoo-friendly, especially in tourist areas. Some now sell waterproof tattoo cover sheets at the front desk.
- Rural or traditional onsen towns (like Beppu or Kinosaki): vary widely — check in advance or ask at your accommodation.
The practical advice: book private onsen baths when in doubt. Many ryokan offer private rotenburo reservations for ¥1,500–3,000 per hour. This solves the tattoo question entirely, adds privacy, and is often a better experience anyway.
If you want to use a shared bath and have visible tattoos, look for facilities that explicitly state they welcome tattooed guests — this information appears on most accommodation booking platforms now, and some onsen explicitly market themselves as tattoo-friendly.
What Is the Correct Procedure at an Onsen?
The washing step is where most first-timers go wrong — not the bathing itself.
Step 1: Undress completely in the changing room. Everything comes off. The small towel (provided or brought from your room) comes with you into the bathing area but does not go in the water.
Step 2: Wash thoroughly at the washing station before entering the pool. The washing stations are the low stools and handheld shower heads along the wall. Sit on the stool, turn on the shower, and wash your entire body with soap and shampoo. This is not optional — entering the shared pool before washing is a genuine faux pas. The bath is for soaking, not for cleaning.
Step 3: Rinse completely. No soap residue should enter the water.
Step 4: Enter the pool slowly. The water is hot — usually 40–43°C (104–109°F). Ease in gradually, especially if you’re not accustomed to this temperature. The first 30 seconds can feel intense.
Step 5: Keep your small towel out of the water. Fold it and place it on the edge of the pool or on your head. The towel-on-head look isn’t a quirky affectation — it keeps the towel from trailing into the water.
Step 6: Soak for 10–20 minutes, then take a break. Most veteran onsen-goers cycle: 10–15 minutes in the hot water, a few minutes resting outside or at the cold water station, then back in. Staying submerged too long in high-temperature water is uncomfortable and can make you light-headed, especially if it’s your first time.
Step 7: Pat dry before returning to the changing room. The floor in the changing room is typically dry; dripping back through from the bath area is inconsiderate to other guests.
Are There Other Rules to Know?
A few that come up often:
Men and women bathe separately at nearly all public onsen and most ryokan. Rotemburo (outdoor baths) at some ryokan are rotated between men and women at different times of day, or reserved as private units.
No swimming, splashing, or loud conversation. Onsen etiquette is quiet and contemplative. You can whisper and have a calm conversation, but treating the bath like a pool party is not appropriate.
Photograph nothing. Obviously — but worth stating.
Rinse off if you’ve been sweating. After hiking, a long train journey, or sightseeing, a quick shower before entering the pool is expected regardless of whether you feel particularly unclean.
Enter and exit slowly. Sudden movements disturb other bathers. The pace is deliberately unhurried.
Tie back long hair. Hair should not trail in the water.
What Are the Best Onsen Experiences in Japan?
Hakone is the most accessible from Tokyo — 90 minutes from Shinjuku, with dozens of ryokan along the volcanic ridge. The view category here is Mt. Fuji on clear mornings, which at certain outdoor baths frames the mountain perfectly over the steam. The Hakone Kowakien Yunessun spa complex is the most accessible for visitors who want a less traditional format (swimwear allowed in some pools). For the classic experience, book a ryokan in Gora or Sengokuhara with an in-room rotenburo.
Beppu on Kyushu is Japan’s hot spring capital by volume — over 2,400 spring sources and eight distinct spring types. The Jigoku (Hell) Springs are a tourist circuit of boiling, churning, vividly colored springs that you observe rather than bathe in (temperatures above 90°C). The actual bathing springs are spread across the city’s public sento bathhouses, which charge ¥100–200 for entry. Beppu is a genuine onsen town rather than a resort — local residents use the public baths daily, and the experience is far less curated than Hakone.
Kinosaki Onsen in Hyogo Prefecture is a single town with seven public bathhouses, all walkable in yukata (light cotton kimono provided by your ryokan). The tradition is to check into your ryokan, change into yukata, and spend the evening hopping between baths. It’s one of the most complete traditional onsen experiences available.
Nyuto Onsen in Akita (northern Honshu) is a cluster of remote mountain ryokan with some of the most mineral-rich and visually dramatic outdoor baths in Japan — wooden tubs, mossy stones, steam rising through snow-covered trees in winter. The journey is longer but the payoff for serious onsen enthusiasts is significant.
What Should You Bring to an Onsen?
If staying at a ryokan: Everything is provided — yukata, small towel (tenugui), large bath towel, and usually toiletries. Your room key often controls the private rotenburo reservation system.
If visiting a public bathhouse (sento) or day-use onsen:
- Small towel (you can usually rent or buy one at the entrance for ¥100–300)
- Toiletries: shampoo, conditioner, body wash (some facilities provide these, many don’t)
- A change of clothes or a bag for your street clothes
- Cash — most public bathhouses are cash only, and entry is typically ¥400–800
What not to bring:
- Your phone or camera — leave both in a locker
- Valuables — use the provided lockers
Is It Worth the Awkwardness for First-Timers?
Yes, unambiguously. The awkwardness lasts about five minutes and then dissolves. Within two sessions you’ll understand why Japanese travelers build entire trips around onsen towns, why ryokan guests set alarm clocks to catch the early-morning bath before anyone else arrives, and why spending two hours soaking in mineral-rich water while looking at a mountain is one of the more genuinely restorative experiences travel offers.
The procedure looks complicated in writing. In practice, you watch what the person next to you does, follow along, and it’s intuitive within minutes. No one expects foreign visitors to perform this perfectly on the first try. The culture around onsen is warm and inclusive — the shared vulnerability of the experience levels the playing field in ways that are hard to find elsewhere.
Go. Just wash first.
Build your Japan onsen itinerary with the AI Trip Planner — it can help sequence Hakone, Beppu, or Kinosaki into your existing route.
Related reading: Japan Beyond Tokyo and Kyoto for how to weave Hakone and Takayama into a longer circuit, and the 2-week Japan itinerary for the full structure.