Onsen Etiquette for Women: What to Expect Before Your First Visit

Most onsen in Japan expect you to bathe naked in gender-separated water, wash your body before entering, and keep long hair tied up and away from the water. There is no dress code beyond that, no rule about body hair, and no formal ban on entering during your period, though most facilities discourage it and many women choose to skip a soak that day regardless. Tattoos, small towels, and what to do with your belongings are the other three things that trip people up before a first visit.

Do you really have to be naked

Yes, in the vast majority of traditional onsen, the bathing area itself is nude, separated by sex, with a curtain or sign in Japanese marking which side is which (look for the character 女, meaning woman, or a red curtain, though colors are not universal). Swimsuits are not worn in the water. This surprises a lot of first-time visitors more than anything else on this list, but it is the standard everywhere from small ryokan baths to large public bathhouses.

What you carry in is a small hand towel, sometimes called a modesty towel. You use it to rinse off before entering, and many women hold it loosely in front of themselves while walking between the changing room and the tub. Once you are in the water, the towel usually stays folded on your head or set aside on the edge of the bath rather than dipped in the water itself, since soap and towel residue in the shared bath is considered unclean.

A growing number of newer facilities, spa resorts, and some outdoor mixed areas allow swimsuits or a special bathing garment. If a swimsuit-friendly option matters to you, check the facility’s own rules before you go rather than assuming either way.

What about body hair

There is no rule, written or unwritten, requiring you to shave or trim before entering an onsen. Japanese women vary in what they do, the same as anywhere else, and nobody is checking. If you feel more comfortable trimming beforehand, that is a personal choice, not an etiquette requirement. The one practical note: some public bath towns post signs asking bathers not to shave inside the bathing area itself, since it clogs drains and leaves hair in shared water. If you want to shave, do it before you arrive or in a private changing area, not at the edge of the communal tub.

Can you use an onsen during your period

Most onsen facilities, including many ryokan, ask that women not enter the communal bath during their period. This is posted as a house rule in some places and simply assumed in others. The concern is shared water, not judgment, and it is treated the same way a public swimming pool might handle the same situation.

Tampons are not considered a workaround, and staff generally will not check or ask directly, but the expectation still stands as a matter of consideration for other bathers. If your period falls during a trip you have planned around hot springs, a few practical options exist. Many ryokan offer a private bath, sometimes called a family bath or reserved bath, that you can book for an individual or a couple rather than sharing the main communal pool. Day-use facilities in onsen towns sometimes offer similar private options for an extra fee. If a private bath is not available, the shower area is still usable on its own, and a foot bath, common in many hot spring towns as a free public feature, lets you get some of the experience without the shared soak.

What to do with tattoos

Many traditional onsen still turn away visitors with visible tattoos, a policy that started around concerns about organized crime association rather than tattoos themselves. This has loosened somewhat in recent years, particularly at facilities used to international visitors, but it has not disappeared. Small tattoos can often be covered with a waterproof patch or bandage; larger ones may need a private bath or a tattoo-friendly facility, which some booking sites and tourism offices in onsen areas list specifically. If you have visible tattoos, checking the specific policy of the ryokan or public bath ahead of time saves an awkward conversation at the door.

The washing step nobody skips

Before getting into the water, everyone rinses off at the row of low shower stations along the wall of the changing and washing area. This is not optional and not a quick splash. Most bathers sit on a small stool, use the provided or brought soap and shampoo, and rinse thoroughly before walking to the tub. Skipping this step is one of the few things that will draw a pointed look from other bathers or staff, because the communal water is meant to stay clean for everyone using it after you.

Hair goes up, always, whether with a hair tie you bring or a rubber band sometimes provided at the entrance. Letting hair fall into the water is considered careless rather than scandalous, but it is noticed.

Situations that make it concrete

If you are visiting a hot spring town built around public bathhouses, such as Kinosaki in Hyogo, the same nude, gender-separated rules apply at each of the town’s public baths, and the modest per-visit cost or an all-day pass covers entry to multiple baths in one outing, letting you try more than one bathing style without committing to a single ryokan’s private facilities.

In Kurokawa Onsen in Kumamoto, a different system exists: a small wooden pass, the nyuto-tegata, lets you use three different outdoor baths across the town’s ryokan, each with its own layout and water temperature, and each following the same basic etiquette around nudity, washing first, and tying up hair. Buying one gives you a low-pressure way to sample a few different baths in an afternoon rather than guessing at a single spot.

If you are traveling with a period, a booking site or the ryokan’s front desk can usually tell you in advance whether private bath reservations are available and how far ahead they need to be arranged, which matters more at smaller inns with only one or two private baths than at large hotels with several.

What to check locally before you go

Rules differ enough from one onsen to the next that it is worth confirming a few specifics directly: whether swimsuits are permitted anywhere on site, whether tattoos need to be covered or banned outright, whether a private or family bath can be reserved separately from the main bath, and what hours the baths are open, since many onsen have separate morning and evening bathing windows rather than staying open all day. Signage at the entrance is often in Japanese only at smaller, more traditional facilities, so if you are uncertain, asking at the front desk before undressing is far easier than working it out once you are already in the changing room.