Japanese Bath House: A Foreigners Guide to Sauna & Sentos

A Japanese bath house (or sentō) has been an essential part of Japanese culture for over a thousand years. Every day, people from all over the country head to the sentō to enjoy their bath.

While this is common in Japan, a sentō is not well known to westerners. With more and more foreigners traveling to Japan, it only makes sense to get the word out about these fantastic Japanese bathhouses. The only problem is that many visitors are nervous about visiting a sento since it is required to be nude around strangers.

The reality is it is not that bad, and once you let your nerves and timidity down, you’ll see that a Japanese bath house is a cultural experience. Here’s everything you need to know about visiting a Japanese sento.

A Guide to Japanese Bath Houses and Sentos

1. What is a Japanese Sento (Japanese sauna)?

Sento Bath Tutrle Symbol
Outside Mannen-Yu with their pin. The symbol of their sento is the turtle!

The short answer is a sento is a Japanese public bathhouse usually separated by sex and open to all.

2. Why Do People Go to Japanese Sentos?

Inside Japanese Sento Hasunuma Onsen
Hasunuma Onsen

Back in the day, most Japanese didn’t have baths in their home, so they went to public bathhouses to bathe a few times a week. These sentos were essentially in every neighborhood so the local residents could bathe and socialize.

Of course, now with modern times, most people have baths in their house but still enjoy the sento bathing experience. Both sentos and onsens are very important to Japanese culture. Still, sadly due to the accessibility of baths, modern culture, and rising costs, sentos around Tokyo and all of Japan are closing.

3. What is the Difference Between a Japanese Sento and an Onsen?

If you’ve researched Japan, you’ve likely heard of a Japanese onsen. They are well known around the world and can be a highlight of any trip to Japan.

There’s honestly not a huge difference between a sento and an onsen, but there is a difference. Sentos are public Japanese bath houses with artificially heated water. Sentos come in many shapes and sizes; you may find jacuzzies, saunas, and cold water baths, depending on where you go.

An onsen is a natural hot spring formed underground. The water is heated by geothermal energy. So if you find yourself in an outdoor bath, you are most likely at an onsen.

It’s important to note the difference so you don’t arrive at a sento expecting a natural geothermal hot spring from the earth.

4. What Do you Need to Bring to Enjoy Japanese Sentos?

Soap Inside Japanese Sento

Not much! You’ll be naked! However, you will want a drying towel for your body, and many people also bring a small wash towel. These are not provided free of charge at the sento but are typically available if you forget yours for a small fee.

Of course, if you have plans after your sento experience, you’ll want to bring the things you need after you typically get done bathing. Underwear, clothes, make-up… stuff like that!

5. What Amenities are Available at the Sento?

Almost all sentos will have a hairdryer in the changing rooms, and some may have extra items like Q-tips and hair spray. Inside the actual bathhouse, you can expect to find body wash and shampoo, and many that I visited even have conditioner.

If you are like me and always need conditioner and fash wash when you bathe, bring these items with you. Many sentos have things like razors and deodorant available for purchase as well.

6. Can I Wear my Shoes or Slippers Inside the Sento?

Lockers in Sento
Put your shoes in the locker.

It’s essential to take off your outdoor shoes at the entrance of the sento. There will be a locker provided for your shoes. Removing your shoes at homes and bathhouses in Japan is common practice.

It is also not common to wear slippers inside the sento or changing rooms. Toilet slippers will be provided at the entrance of the toilet room.

7. How Much Do Japanese Sentos Cost?

Sento Front Desk
At Hasunuma Onsen

There are 530 sentos in Tokyo alone. Almost all of them are members of the Tokyo Sento Association and charge ¥470 for admission. Some sentos may have a Japanese sauna, and those typically cost extra. If you want anything else extra, like a towel or drink, make sure to bring some change. As with most of Japan, make sure to bring cash to pay. Most sentos will not be able to accept credit card.

Note* Some sentos you will pay directly at the traditional attendant’s booth, while some have a ticket vending machine where you will purchase the ticket and then hand it to the attendant.

8. Can You Wear a Bathing Suit in the Japanese Sento?

Inside Sento
Towel worn only for photography purposes

No. Bathing suits are not allowed in sentos. It is customary to be fully naked inside the bathhouse. Foreigners should comply with this Japanese custom. Trust me, no one cares that you are naked or will be “looking” at you. This has been a cultural norm for hundreds of years, and the Japanese are used to bathing naked, amongst others. Don’t worry, in a Japanese sento, everyone is equal – every social status, shape, size, and age!

If you “try” to wear a bathing suit in the sento, I promise you that you will feel more awkward than being naked. It’s not likely that a Japanese person will say anything to you, but they will not be pleased on the inside.

9. Are Japanese Sentos Separated by Sex?

Separate Gender Entrances For Sento

Both sentos and onsens are separated by sex almost immediately after entering the establishment. A blue curtain typically represents men’s bath entrances, and the women’s entrances are marked with a red curtain. If you get confused, ask the front desk attendant, and they will point you in the right direction.

10. Are Tattoos Allowed at the Sento?

Sentos in Tokyo
Outside Kairyo-Yu

Tattoos are not common in Japan, and it was once thought that if you had a tattoo, you were a member of the notorious Yakuza. Therefore, sentos and onsens banned tattoos from the bathhouse.

However, times are changing, and most sentos owners are aiming to be more accepting of tattoos. Now around 90% of the sentos in Tokyo gladly accept those with tattoos into their premises to create a warm and welcoming environment for everyone.

If tattoos are not allowed, you will know at the entrance as there will be signs.

11. Do I Have to Wash First?

Yes. It’s essential to wash your body first before getting into the Japanese bath house. In every sento, you will see rows of numerous shower heads with stools for washing. Near the showerhead, you’ll likely find soap and shampoo. It’s important to wash your body off here before entering the bath.

It may seem intimidating, but it’s not hard! Just sit (don’t stand) on the stool and turn on the showerhead and begin washing. Remember that you should turn the water off when not using the shower head to avoid wasting it.

It’s not necessary to wash your hair if you don’t want to. Just make sure that if you have long hair that it’s not touching the bathwater. Bring hair ties so that you pull it up into a bun when relaxing.

12. What is the Small Towel For?

Towel in Sento

When enjoying sento, you’ll notice that most people will have a small towel with them. This is for washing or whatever you want it for. Do not put the towel in the water of the bath. When enjoying the bath, the towel should be placed on top of your head.

13. Can I Walk Around with a Towel?

Sento in Japan
Towel worn for photography purposes.

It’s perfectly acceptable to walk around the changing room with a towel; once you enter the bath, it’s pretty normal to be naked from here on out. Remember to place your towel somewhere dry and away from the bathwater when in the bath, so you have it when you get out.

14. When Are Japanese Sentos Typically Open?

When Are Japanese Sentos Typically Open?
Inari-Yu Japanese Sento

Every sento is different, but most open at 3 pm and stay open until 11 or 12.

15. Can I Bring my Phone or Camera into the Sento?

No Camera Sign in Sento

Phones and cameras are not permitted in a Japanese sento or onsen – people are nude and want their privacy. Note that I have photos of myself in the sento in this post, but I was in the sento before opening hours and had special permission from the owners to take photos for the purpose of this article.

16. How Can I find Sentos Around Tokyo and the Rest of Japan?

How Can I find Sentos Around Tokyo and the Rest of Japan?

Typing in “sento” to Google Maps will yield many results for sentos around Tokyo or anywhere else that you are in Japan. You’ll know that you reached the sento when you find the Noren hanging outside the entrance.

This is a curtain that is hung at the entrance of buildings in Japan when they are open. The sento symbol is an oval with three curved lines rising out of it (for heat). See the photo above!

17. Can you Talk in a Sento?

Sento Water

Sentos are a place for conversation and socializing (although not loud ones), and not quite like a Japanese spa house you may be thinking of. However, if you aren’t with a friend and you don’t speak Japanese, chances are you will be conversing with no one. But don’t be surprised if other people are having low-key conversations around you.

18. How Hot is the Water?

japanese bath house water

Some of the sento water can get seriously HOT. In one Japanese bath I was in on the Kumano Kodo I couldn’t stand it for more than five minutes and had to exit. If you start to feel lightheaded, it’s vital to get out of the water and either go in the cooler water for a bit or call it a day.

19. Are Japanese Sentos Intimidating?

 Are Japanese Sentos Intimidating?

Your first sento or onsen experience may be a little intimidating, but you’ll start to relax and feel right at home after a few minutes. They are meant to be relaxing for visitors, and after your nerves calm down about being naked in front of others, you’ll soon fall right into the swing of things. Don’t worry if you don’t do something perfectly the first time, but in saying that, most sento customs are pretty much common sense.

The main things to remember are no bathing suits, wash beforehand, and keep your towel out of the tub.

20. How Does a Typical Sento Experience Go?

walking in to the japanese sento
Outside Mannen-Yu

A typical sento experience will go something like this:

  • Step 1: Enter the sento and remove your shoes. There will be lockers to place your shoes. Some sentos also have umbrella holders, leave the umbrella here.
  • Step 2: Pay for the sento either with the attendant or at the vending machine
  • Step 3: Enter either the mens or women’s changing rooms. Undress completely and get ready for sento! Put your belongings in the provided lockers.
  • Step 4: Enter the bathhouse with your bathing items. Find yourself a shower spot with a stool.
  • Step 5: Wash yourself before entering the bathtub. If you have long hair you can wash it or tie it up so it’s not in the bathwater.
  • Step 6: Enjoy the sento! Some sentos will have multiple baths ranging in temperature. You may also find that there is a Japanese sauna or outdoor bath as well.
  • Step 7: When you are done dry your body off and get ready to leave the sento.
  • Step 8: It is typical to enjoy a glass of cold milk, cold coffee, beer, or other refreshments after sento. You can find these for purchase outside the changing rooms where you entered.
Coffee milk after the sento - perfect!
Coffee milk after the sento – perfect!

21. Why Should You go to Sento as a Foreigner?

Sento Mascot
Outside Hasunuma with the Sento Mascot, Yuppokun

Part of the fun about traveling in Japan is immersing yourself in a completely new and different culture. Japanese bath houses (sentos AND onsens) are both unique to Japan, so to travel to Japan and not visit one would be a mistake.

I’ve been to over ten different onsens and sentos, and once you get over the fear of getting naked in front of strangers your first time, each one after that is a relaxing experience.

Additionally, as mentioned before sento numbers are down, and sadly many are closing shop. As tourists, it’s crucial to support and give back to the community you are visiting, and going to sento does just that. Every sento I’ve been to is happy to see foreigners walk through their doors and eager to share their culture!

Plus, don’t you want to sit and contemplate your fun travel day around Japan in a relaxing environment?

22. What Sentos Should You Visit While in Tokyo?

I visited four different sentos while in Toko, and each one was unique in its own way.


The owners, husband and wife Nobuyoshi Takeda and Satsuki Takeda

This sento is tucked away in the back of Koreatown down a quiet street. Like most sentos in Tokyo, Mannen-Yu is family run by Nobuyoshi-san and Satsuki-san. The inside is modern and sparkling clean. The owners told me the sento has just been refurbished. There is a hot bath, tepid bath, and cold bath on both the men’s and women’s sides.

Hasunuma Onsen

Hasunuma Onsen
Owners, husband and wife Kazuyuki Kondo and Yoshi Kondo

Hasunuma Onsen is gorgeous and brings you back to a different era in Japan. This is another 3rd generation owned family sento and onsen. Here you can find a carbonated spring, cold bath, sauna, and hot spring bath (be careful – it’s really hot)! This onsen is on the way to Haneda Airport, so it’s an excellent place to stop before or after your flight.


The owners, husband and wife team Nobuaki Yamato and Keiko Yamato

Kairyo-Yu is an extremely modern sento that matches the style of nearby Shibuya station. Upon entering this sento you feel as though you’ve stepped into another world. The artwork on the walls depicts scenes from Shibuya and is relaxing to look at as you enjoy your bath. There’s also a cold bath and sauna here.


Owner, Shunji Tsuchimoto

This sento is one of the oldest ones in Tokyo. Built in 1930, Inari-Yu is a timeless Japanese bath where you can soak in the warm waters while admiring a painting of Mt. Fuji on the wall.

This sento has retained the charm and character of its early 1900s look, but the bathroom has been completely renovated. This is the only sento I visited that still has wooden buckets and a Japanese-style garden with carp.

Above All, Enjoy Your Japanese Sauna Experience!

Japan Travel Planning Resources

About Natasha Alden

Natasha is the co-founder of The World Pursuit. She is an expert in travel, budgeting, and finding unique experiences. She loves to be outside, hiking in the mountains, playing in the snow on her snowboard, and biking. She has been traveling for over 10 years, across 7 continents, experiencing unique cultures, new food, and meeting fantastic people. She strives to make travel planning and traveling easier for all. Her advice about international travel, outdoor sports, and African safari has been featured on Lonely Planet, Business Insider, and Reader’s Digest.

Learn more about Natasha Alden on The World Pursuit About Us Page.

2 thoughts on “Japanese Bath House: A Foreigners Guide to Sauna & Sentos”

  1. Thank you for the in-depth report about Japanese bath houses. I have been to many types of bath houses, like the turkish baths in Paris, or the Korean bath houses in Seattle and Los Angeles. I loved Ten Thousand Waves, a traditional Japanese bath house in the hills of Santa Fe, NM. I think I’ll book one this week now.

Leave a Comment