Japan Onsen Etiquette: A First-Timer's Complete Guide

Published: 2026-09-17 / Updated: 2026-09-17 ・ 5 min read

Japan Onsen Etiquette: What First-Timers Need to Know

The core rule of Japan onsen etiquette is simple: wash your entire body thoroughly before entering the bath, and never let your towel or hair touch the water. Almost every other custom—undressing completely, staying quiet, and handling tattoos—flows from that one principle of keeping the shared bathwater clean.

This guide walks through the process from the changing room to the bath itself, so visitors who have never used a Japanese hot spring can walk in with confidence.

Before You Go: What to Bring

Most onsen and public bathhouses (sento, 銭湯) rent or sell what you need, but it helps to bring:

• A small hand towel (many ryokan provide one in the room; larger facilities sometimes sell one at the front desk)
• A larger bath towel for drying off afterward, if your accommodation doesn't supply one
• Hair ties, if you have long hair
• Any toiletries you prefer, though shampoo and body soap are usually provided at the washing stations

You do not need swimwear. Traditional onsen bathing is done nude, and swimsuits are generally not allowed in the bath itself, though a small but growing number of facilities now offer swimsuit-permitted areas. If this matters to you, check the individual facility's official website before visiting.

Step-by-Step: The Onsen Bathing Process

1. Check In and Find the Right Entrance

At a ryokan (旅館) or day-use onsen, staff will usually explain where the baths are. Baths are separated by gender, marked with curtains (noren, のれん) — red or pink typically for women, blue for men — though colors can vary, so also look for the characters 女 (women) and 男 (men) on the curtain or door.

Some ryokan offer private baths (kashikiri-buro, 貸切風呂) that can be reserved for a household or couple, which sidestep questions of shared nudity entirely. These are worth asking about at check-in if you'd prefer more privacy.

2. Undress Completely in the Changing Room

The changing room (datsuijo, 脱衣所) has baskets or lockers for your clothes. Remove everything, including underwear, and place your belongings in a basket or locker. Bring only your small hand towel and, if provided, a locker key into the bathing area.

3. Wash Before Entering the Bath

This is the step first-timers most often skip, and it's the one that matters most. Before getting into the shared bath, sit on one of the low stools at the washing stations (kake-yu, かけ湯 area), and rinse and wash your entire body with the shower or hot water provided. Shampoo, conditioner, and body soap are usually available. Rinse thoroughly so no soap enters the bath.

A quick splash is not enough — take a few minutes to wash properly, as you would at home before soaking.

4. Enter the Bath Quietly

Once clean, you can enter the bath (or baths, if there are multiple pools of different temperatures). Ease in slowly, as onsen water is often hotter than a typical home bath, sometimes noticeably so. Keep your small towel out of the water; most people either leave it on the side or fold it and place it on top of their head, which is a common and accepted habit.

Onsen are generally quiet spaces. Loud conversation, splashing, or swimming is considered inconsiderate to other bathers.

5. Rinse Off (Optional) and Dry Before Returning to the Changing Room

Some bathers give themselves a final rinse after soaking, though it isn't required at every facility. What is important is drying off with your towel before stepping back into the changing room, so you don't drip water everywhere.

Common Mistakes First-Time Visitors Make

• Wearing a swimsuit into a traditional bath. Unless a facility specifically states it allows swimwear, assume it does not.
• Skipping the pre-wash. This is the single biggest etiquette mistake, and staff will sometimes politely intervene if they notice.
• Letting a towel touch the water. Keep it on your head or on the side of the bath.
• Taking photos in the bathing area. Cameras and phones are essentially never allowed near the baths, for obvious privacy reasons.
• Jumping in with wet or long hair loose. Tie hair up so it doesn't touch the water.
• Assuming all baths are unisex or mixed. Mixed-gender baths (konyoku, 混浴) do exist at some traditional, often rural facilities, but they are the exception, not the rule.

Tattoos and Onsen: What to Expect

Policies on tattoos vary significantly from one facility to another. Historically, tattoos have been associated with organized crime in Japan, and many onsen and public baths still refuse entry to visibly tattooed guests. However, attitudes are gradually changing, and a growing number of facilities now allow tattoos outright, or permit them if covered with a waterproof patch or bandage of a certain size.

Because there is no single nationwide rule, the only reliable approach is to check the specific onsen or ryokan's official website, or contact them directly, before your visit. Some accommodations with private baths (kashikiri-buro) are a straightforward workaround, since these are booked exclusively for one group.

A Few Extra Points of Etiquette

• Age and children: Family baths or private baths are often the easiest option for parents bathing with children of a different gender once the children are older; ask the facility about their age policy for shared baths.
• Drinking alcohol before bathing: It's generally advised not to drink heavily before entering a hot bath, both for comfort and safety.
• Hydration: Bathhouses often have a rest area with vending machines or a lounge; taking a break and rehydrating between soaks is common practice, especially if you plan to bathe more than once.
• Onsen versus sento: Onsen use naturally heated mineral spring water, while sento (銭湯) use regular heated tap water; etiquette for washing, nudity, and quiet behavior is essentially the same at both.

Planning Your Visit

Onsen towns across Japan, from Hakone to Kusatsu to Beppu, are accessible by train and bus from major cities, and travel times vary widely depending on your starting point, so check current routes and schedules before you go. For general travel planning and updated information on transport passes, the Japan National Tourism Organization is a reliable starting point, and rail operators such as JR East and JR Central publish their own route and pass information for regions they serve.

Opening hours, entry fees, and tattoo or swimwear policies can all change without notice, so it's worth checking each facility's own website close to your travel date rather than relying on older guides.

FAQ

Q. Do I need to wear a swimsuit in a Japanese onsen?

A. No, traditional onsen bathing is done nude. Some newer facilities offer swimsuit-permitted areas, but this isn't the norm, so check the facility's website if unsure.

Q. Can people with tattoos use onsen in Japan?

A. It depends entirely on the facility. Many still refuse entry to visibly tattooed guests, though a growing number allow tattoos or accept a covering patch. Check each facility's official policy before visiting, or consider booking a private bath.

Q. What should I bring to an onsen if I don't have my own towel?

A. Many ryokan provide a small towel in the room, and larger day-use facilities often sell or rent towels at the front desk, so it's rarely a problem to arrive without one.