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    Onsen

    4.0 (108 reviews)
    ModerateDay Spas
    Open 10:00 am - 10:00 pm

    By appointment only

    Updated 2 months ago

    Onsen Photos

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    Recommended Reviews - Onsen

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    NY strip supplement - delicious! Perfectly rare and served with an incredible sauce.
    Mike P.

    Managed to book the last reservation slot for Claws of Mantis' pop-up at Onsen and I'm SO glad we did. Not sure if I should leave this review for the Day spa or the restaurant, but the meal alone was incredible and a delicious homage to Vietnamese home cooking. It's a tasting menu so you do just get whats on the menu but there are supplements which we (obviously) partook in. Highlights: Amberjack crudo with Asian pear: loved the savory sweet balance for this starter. Wasn't too hungry before this but this stimulated the appetite Purple daikon salad: perfectly pickled with the right amount of bitterness from the whipped tofu. An unexpected gem. Charred cabbage with pork jowl: favorite bite of the night!! Everything was perfectly balanced and hit all of the flavor and texture notes of a 3 star Michelin restaurant: smoky, sweet, crispy, unctuous, savory, all finished with a bite of pickled cabbage for sour. Could've eaten 14 of these easily. New York strip supplement: really really tasty steak served rare with with Crying Tiger sauce on top - always a treat Sablefish - they we're out of the pineapple which I think really would've made this, but it is an owed to the sweet-and-sour catfish soup which I loved as a kid Dessert was a mango pandan pudding with citrus on top which I felt was a perfect end to all of the somewhat heavy flavors consumed in our meal. Loved it! We came here because my girlfriend has been following the chef's Instagram for about 10 years and I'm happy to say that this was a super memorable experience. I loved every dish and all the sake pairings. Would definitely come back on his next rotation! --- Sweet: delicious pork jowl and steak! All dishes were hits Bitter: wish we could have tried the onsen!

    fall kakiage
    Michelle Z.

    Had an amazing experience here! Booked the 2 hour soak + dinner experience. The timing is super flexible so you can arrive anytime for the soak and also start dinner anytime. The inside of the spa is very relaxing, with a heated pool, steam room, sauna, and cold shower. It's all in one area so it makes for a very communal experience. The ambiance was very calm and quiet when I went even though there were a lot of people. The experience feels very luxurious, with robes, towels, and even toner provided in the women's locker room. It was my first time doing a sauna/cold plunge and it was a great experience! I also loved the dinner portion; the set menu was creative. We also ordered 3 items off the add on menu and it was a very filling meal. They added a candle to my dessert since it was birthday! I love how the concept is pop up chefs so you'll get a new menu if you come back. The staff were super friendly from the beginning until the end, and the service during dinner was extremely attentive. It exceeded my expectations by far and I will definitely recommend to friends!

    Andrea Z.

    Made reservations for a Saturday afternoon at 12pm with a friend. Arrived a little bit late but was still able to enjoy the spa just needed to end at my original reservation time of 2pm. Spa included use of towels, sandals and robes, toiletries (soap, shampoo, conditioner, mouthwash, lotion and toner). Steam room was nice, lots of hot steam with space for about 6 people to sit comfortably in a tiled steam. Sauna was electric, nice, hot and dry, felt a bit more spacious in this area. Probably enough for 8 to ten. Hot tub in the center of the onsen, was solid wish the water was a little hotter but really nice to soak in between a quick cold shower and the hot tub or sauna. Three showers are available which you need to wash before and after the use of the spa. Overall enjoyed the experience, there were probably 10 other guests enjoying the onsen so felt a bit crowded at times but otherwise a great relaxing experience.

    Love these simple-yet elegant aesthetics...
    Kay O.

    It was definitely a beautiful vibe and I was so excited to check this place out for my birthday that I didn't notice. The pictures were angled and it was one giant jacuzzi like pool, that fit maybe 20 people in the bathhouse at the same time as my girlfriends and myself. There was also a steam room and a sauna, which both seemed very nice, hot and relaxing, but I didn't want to mess up my hair, so I didn't explore either of these two other rooms. lol It was very relaxing and quaint, but you literally have to whisper since you're sitting in different parts of the bathhouse with other people. Lol, We liked hanging out more in the restaurant portion where we could drink our sake and at least have our own conversations. The lady that served us gave us a recommendation of the glass of socket so we could get a little bit more than 4 cups a piece. We also got a beer that was a perfect pairing by her recommendation. Everything was incredibly relaxing and very clean and organized. I also loved how there were separate bathing areas with dividers and soap available to shower before/after you go into the bathhouse, but my main issue was I thought it was like the Palo Alto bath house with multiple pools. I didn't realize it was one giant Jacuzzi like pool for essentially 20 people in a two hour timeslot. Parking is nonexistent over here so I'm glad we took an Uber over from the hotel where we parked our car at. I will also say the only locker available to me was the one on the very far bottom which was rather hard and cumbersome for me to reach over and get since I just recently had surgery on my back. Since we were the last group within the timeslot. There were quite literally no other lockers available. I didn't want to bother anybody that worked there, so I didn't say anything, but it was rather cumbersome for me to get my things in/out of the locker. Nevertheless, it was very relaxing, and we had a great time, but I think I would just go back to the restaurant section and not the bathhouse portion.

    pork belly with yuzu kosho aioli yaki
    Sarah C.

    we got a dinner reservation separate from the onsen experience, so we had to sit at the bar. the set menu was $60/pax and we added $10 for a duck dish. service was great! overall I felt the food wasn't really worth the price -- most of the dishes were pretty simple and bland, and we were still hungry afterwards. kudos to the creativity but I think some dishes were more for acquired tastes - seasonal pickles - roasted beets, sake kasu 'cheese', soy balsamic, thai basil - charred cabbage, chive & tofu dressing, ikura - hamachi, aguachile, rau ram, cilantro, wasabi - chicken broth, shiitakes, green onion - onsen egg, kitty rice, katsuobushi - duck tsukune with egg yolk jam (our $10 add-on) - pork belly with yuzu kosho aioli yaki - sea bass, thai curry yaki - king trumpet, smoked oyster tare yaki - black sesame ice cream, honey meringue, graham cracker the onsen was $50/pax, and I would say it's quite worth the 2 hours as you can rotate between the dry sauna, steam, cold plunge, and onsen. there's free hot tea and iced water, as well as showers and locker rooms.

    peach mango compote and cheesecake mousse
    Wesley L.

    Amazing experience with the bathhouse and dinner combination. Currently doing guest chefs. A 2 hour bathhouse experience prior to a set menu dinner. Loved having a nice meal after a long soak. Overall will definitely come back. kinilaw ajo blanco- so many different textures with the tuna, the soup, and chips. You would think it would not work but It all fits together so nicely salted egg focaccia- amazing soft bread. I am always a sucker for garlic confe. Had to make sure the bread soaked up all the oil on the plate summer risotto- Nice soft and creamy risotto. Nice and light and was great to have with the fish grilled branzino- perfectly cooked fish that was soft and tasted amazing with the sauce. Had a nice acidic touch but somethings that acid was a bit much peach mango compote and cheesecake mousse- A nice warm dessert and was nice to have all those different textures come together. Felt it was a bit heavy on the cinnamon but otherwise it was good

    Caili C.

    I came to check out the Onsen with my partner during the co-ed weekend hours. The restaurant has not reopened yet but we really enjoyed this spa which feels like an oasis in the city. The moment you step in, it feels super serene and you're given towels, a robe and slippers to change into. The locker rooms have the basic amenities and hair dryers to change for the main area which has shower stalls, a hot spring, steam room, sauna and a cold shower. The main area including the shower stalls are communal. While it is a smallish space, we enjoyed cycling through the rooms and there are a few lounging chairs to rest in. Overall the 2 hour time slot for the small space feels about the right amount of time to fully enjoy the facilities and there is water and hot tea to hydrate in the main area. I do wish they had an actually cold plunge pool rather than just a cold shower but it does feel very clean and renovated for now so that is a plus. Definitely make a reservation through Tock ideally a week in advance as time slots especially on weekends sell out quickly.

    Makena L.

    So relaxing and aesthetic! We made reservation for 4 at 10 am. It was we lovely inside and renovated nicely. There is one pool, one sauna, one steam, one cold plunge shower. Water and hot tea is offered inside. There are no talking rules lightly enforced; when I went, people were talking at a high-whisper to low-talk level. There are nice showers with body wash, shampoo, and conditioner. They also provide towels, robes, and slippers. There is body lotion and toner in the bathroom. There's also lockers for your things. Service there is very nice! There's also a bar at the front where you can sit and order drinks or light snacks after your soak. For only $50 for 2 hours, I would go again.

    Restaurant
    Matty E.

    Who would've thought a carefully curated Japanese bathhouse would be tucked away in the heart of the Tenderloin! Every corner of this onsen feels like it was purposefully chosen, from the black-and-white tile in the steam room to the MUJI-esque tin jugs of cool ice water. It's a really beautiful and extremely clean spa. Whoever designed the space did so thoughtfully and without cutting any corners. Admittedly, the biggest downside of this onsen is that it does feel a bit small. There is only one main room, with a hot tub in the center and a steam room and sauna on either ends. There are also only three showers and three lounge chairs, so sometimes there's a bit of a waiting game. But at a spa, time should never feel rushed! Highlights included the traditional robe they give you to change into as well as the unlimited refills of warm mint tea. Little details like this go a long way in sending the message that the spa is well-maintained and thoughtfully designed. Hoping to come again and combine the experience with the restaurant. For those coming on a co-ed day (like I did), make sure to bring a bathing suit. Robe, towels, and sandals are provided. Lotion, mouthwash, and a hair dryer are provided in the men's locker room, but you'll need to bring your own deodorant/hair products/toothbrush and toothpaste.

    Salmon crudo
    Giovanna R.

    Amazing place! Will def be back. Loved the spa + dinner experience! Service was amazing, both spa and dinner, upon entering and through the dinner service. On this visit they had Aku BBQ for their dinner popup, who are always great -- had them before. My fave dish was the salmon!

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    11 months ago

    If you can come here mid week between 2-4 when no one is really there then you're winning!! Staff is super nice

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    5 months ago

    Great experience, clean and welcoming . Lovely staff, great ambiance - has a lovely sun roof with natural lighting

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    Ask the Community - Onsen

    When will Onsen be reopening? (website says "temporarily closed"

    Open now.

    Is there any vegan options?

    Yes

    Don’t See Your Question? Ask Away!

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    Pearl Spa & Sauna - Waiting area

    Pearl Spa & Sauna

    4.8(1.3k reviews)
    0.8 miJapantown, Lower Pacific Heights
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    Was staying across the street at the Hotel Kabuki and saw Pearl and looked it up. Around 11pm on a…read moreSunday night found 2 openings for a Korean Body scrub (7:30am and 9am). I booked the 9am and got there about 8:25, which gave me time to get oriented/tour facility and do a soak to prep. The reviews were accurate. I glad I was solo, made it easier being comfortable being nude. Lots of amenities to glam up before leaving. It was calm and quiet when I arrived, and got busier as I was leaving. Staff was great, and made me feel comfortable and welcomed. They explained everything and answered questions with a smile. The place was super clean and staff actively removed used towels/swept throughout my stay. A good scrub, felt like a symboloc ritual for shedding the old for the new. I now have baby soft skin!

    Absolutely loved my spa day here. Came around 9:40am for a 1030am appointment…read more We did a 90 mins milk and honey treatment. After the body scrub they wrap your body in a foil while they shampoo your hair and apply a face mask. The spa is small but has the essentials: sauna room, steam room, cold plunge, and jacuzzi. Upstairs there's a clay ball room and the salt room. My absolute favorite was the clay ball room. I was so relaxed after my 90 mins treatment when I went into the clay room I almost fell asleep. I will definitely come back. Only thing is it is in japantown so parking can be hard. But it was very convenient to go across into Japan Center for lunch afterwards

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    Pearl Spa & Sauna - Waiting room

    Waiting room

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    Room to dry hair and get cleaned up.

    Kabuki Springs & Spa

    Kabuki Springs & Spa

    4.1(1.3k reviews)
    0.9 miLower Pacific Heights, Japantown
    $$

    Nobody asked for a Kabuki vs OnsenSF comparison, but here…read moreyou go. 1. $$$ Price Kabuki is $49/pp 2.5 hrs OnsenSF in the tenderloin is $50/pp 2 hours 2. Environment & Ambience: Kabuki has a much wider space, calming music, great ambience, wonderful smells and decor. OnsenSF is a dining space when you enter and spa in the back. Everything looks modern and nice, relaxing environment despite being located in the tenderloin. 3. Hot Tub: Kabuki has a rectangle shaped hot tub as opposed to OnsenSF's square shaped tub. 4. Cold plunge: Kabuki has a cold plunge that's perfect for people who don't need it to be extremely freezing. OnsenSF has a cold shower with many heads in place of a cold plunge. Both are enjoyable experiences 5. Steam Room: Kabuki's steam room is also rectangular as opposed to OnsenSF's square room. Kabuki's steam room also has a shower to rinse off excess salt and sweat before entering the common area. 6. Showers: At Kabuki, there's also a line of stools for the seated handheld showers where you can fill a tub of water and pour it over yourself in addition to the traditional shower stalls, where OnsenSF only has the traditional showers if I recall correctly. 7. Sauna: The sauna was great because you could adjust the heat by moving up the wooden bleachers. There was also plenty of space to stretch out and lie down. There were wooden half-cylinder blocks to place under the neck and back to promote blood flow. My partner's favorite standout was the salt scrub they have that's free to take at the refreshments table. You use it to scrub away dead skin in the shower and steam room. My favorite was the bowl of towels buried in ice cubes that helped me keep a cool head in the hot tub and sauna room. I will say that the thing that makes OnsenSF stand out is their dining pop-ups, but there's plenty of dining options on Fillmore and in Japantown. I would definitely go back to Kabuki again. The experience was incredibly relaxing. Highly recommend.

    Possibly the best bathhouse in the Bay Area…read more Kabuki Springs is tucked away off a busy street in Japantown and feels like a portal to another dimension, one full of warm water, a quiet atmosphere, and plenty of lemon ginger tea. I was instantly drawn to how intentional everything feels here, from the dark wood of the sauna to the sleek tile in the showers. It feels carefully crafted to be both modern and timeless, with the Japanese motif flowing through all of the design. Personally, I love the dim lighting in the baths; with no windows, it feels like time is suspended. Is it midday, or midnight? Sunny, stormy? Early, late? You can't really tell when you're there, and that feels like the point. It's an escape in its truest, most relaxing sense. Attendants are constant in the baths, which makes it feel far more luxurious than what the price would suggest. Cucumber, lemon, or plain water are all on tap, as are iced hand towels, salt scrubs for the steam room, and hot lemon ginger tea. I loved how cups are encouraged to be reused (I hate seeing the giant pile of single-use cups in the trash at other spas). I'm holding out hope, however, that traditional green tea may make an appearance in the future! I'd recommend attending on one of the single-gender days, as I found that lent itself best to the fully immersive experience. Shower sandals are available, though I found them a bit uncomfortable. Next time I'll be sure to bring my own. As a bathhouse enthusiast, I cannot recommend this place enough. I can't wait to bring my friends here to learn for themselves just how relaxing and rejuvenating the sauna, steam, soak, and plunge rotation can be.

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    Kabuki Springs & Spa
    Kabuki Springs & Spa
    Kabuki Springs & Spa

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    Archimedes Banya - Great place to hang out all day the massage therapist are really good and people seem cool.

    Archimedes Banya

    3.9(732 reviews)
    4.4 miBayview-Hunters Point
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    First time went to unwind and actually really enjoyed the community vibes…read more They offer everything you need to relax, there's honestly not a lot of places like this and I appreciate it. Two things that I can't ignore and hope management reads this. 1. There is room for improvement on the locker room getting so crowded. 2. Do NOT trust the sandals. They are plastic and incredibly slippery when wet. Since they are not sized to the individual, it's dangerous. I slipped out of my sandals and fell down the stairs in the large Russian Sauna. This resulted in multiple abrasions and a large laceration on my forearm and I actually got stitches for the first time. Sandals have to be fixed, there's stairs everywhere here. The people in the sauna were super nice and helped me, luckily, I'm pretty fit, but it could've been really really bad. Credit to the staff for not charging me for my time there, honestly, I would've rather paid and left uninjured. I'm not 100% sure that I would return, it just happened today so maybe in time that will change.

    Came here for a dinner experience as well as a 3 hour soak in the banya experience!…read more Good: - It wasn't busy Saturday at 4:30 pm! We got a lucky break - They added a super beautiful sauna with an amazing view on the top floor, loved sitting here and reliving the feeling of being in Finland Saunas - I love the aromatherapy experience! It's super hard to sit through it all and I didn't make it all the way but I basically got through the last round and the cold plunge after felt so great - The food experience was amazing, I loved the tom yum soup with chicken - it feels great to do 2 hours into your experience - Ample spots to sit and I have only felt the squeeze in the hot tubs Bad: - It can get quite packed during peak hours so try to visit when there's less people, otherwise it gets messy and a bit dirty too

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    Archimedes Banya - Excellent art work here lol

    Excellent art work here lol

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    View from the decks

    SenSpa - Bamboo Garden

    SenSpa

    4.4(396 reviews)
    2.3 miPresidio
    $$$$
    Locally owned & operated
    Certified professionals

    This place was AH- Mazing!! Was a little worried from the outside but it did not disappoint…read more 4 seating areas were all ZEN. Exquisite staff and all areas cleaned and stocked. Nora was my massage therapist and she was 10/10! Will def go back next time I'm in SFO!

    The absolute worst. I received a $200 gift card for my birthday but since my husband had really bad…read moreknots, I recommended he utilize it for a deep tissue massage. I called to book him an appointment the day before and told the receptionist that I would prefer someone good and I asked if a male masseuse would be better. She stated that actually the female masseuse would be better if I was comfortable and I appreciated that and said yes I would love the female masseuse for my husband. She the tells me all the accolades the female masseuse that will be working on my husbands back has. Next day, my husband arrives and ends up with Rafael. My husband said Rafael did what he could but unfortunately did not get most of his knots out. When he got home, I massaged his back and was surprised with the amount of knots he still had. It was as if he never got his deep tissue massage. I'm deeply saddened because my husband still ended up paying out of pocket (expensive massage) and he did not feel relaxed after. On top of that, my husband sends me pictures of the locker room that was under construction and said guys were going on and out while he was changing. Very disappointing experience compared to the many other massage spots in SF.

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    SenSpa - Fireplace Lounge

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    Imperial Day Spa

    Imperial Day Spa

    3.7(870 reviews)
    1.0 miWestern Addition
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    After my mom passed away, I wanted to do everything I could to relax and take care of myself. I…read morewent to a spa and got massages a few times a week. I really need to take care of myself. I impulsively booked an appointment for a acupressure massage, jumped into my car and arrived about 30 minutes before my service to take advantage of the facilities. The outside of the facility was nothing to brag about, but the interior of the women's locker room is very nice. The steam room, sauna, jacuzzi and cold plunge were so relaxing. They also have a yellow-red clay room, which was a new experience to me. From their website, "The clay room is a heated sauna where the walls and ceiling are lined with clay. When this clay is heated with infrared light, it releases oxygen that detoxifies the body and helps with any fatigue, inflammation, infection, and menstrual cramps". The Acupressure Massage made me feel a little sore the next day, but by far one of the best massages and such a deal for 90 minute for $150.00 and the use of the day spa included. FANTASTIC.

    First time checking this place out. Not bad for a $100, 45-minute "Swedish massage," though the…read moretechnique was a bit unexpected. Instead of the usual kneading, there was a lot of poking, finger-tracing, and some elbow work. I ended up opting out of the back-walking part. The facilities are a bit tight--the parking lot only has five spots, and the steam and sauna rooms only fit about 4-5 people at a time. The men's and women's areas are separate, which is nice, but the shoe lockers don't actually lock (though you do get a bracelet for your main locker). A few quirks: the water cups are so tiny they are like shot glasses, and they leave the massage room doors open during the session. I think I'll try Kabuki Spa next time to compare.

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    Onsen - spas - Updated May 2026

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