Absolutely amazing experience! Highly recommend both of the bathhouse and the dining experience! Order all the add-ons - they were all amazing! Beautiful space, great food, great atmosphere! read more

My husband surprised me for my birthday with a trip to Onsen and while the outside of this place is not in a favorable area, the inside is impressive... once you go pass the restaurant and into the actual onsen part. In terms of the onsen, the space is nicely utilized. I do wish there was changing rooms in the women's space (and I assume the men's don't have one either) because while you need to be comfortable being naked in a Japanese onsen, it was a little intimidating to be around others and having to strip to change. During your booking time, you're in a group with probably 6-7 other couples so your experience is what the entire group makes it and I was happy the people we were with weren't obnoxious in anyway. The cold plunge is more of a cold shower, the steam room is a bit small and standing next to the radiator can hurt, the steam room is a great size. After the onsen experience, we had our dinner and we thought the menu wouldn't keep us full but it actually kept us content and we left with a smile on our face. read more

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Relaxing but the area is small. You really have to wait for your turn to use some of their amenities. Their staff are friendly, decent place to go and relax! read more

Came here on a Sunday and got there with 2 friends for our 6:15 pm reservation. Good: - Logistics were super smooth from the moment we entered the room! The staff were super nice - The food was very tasty, but the portions were on the smaller side overall - The onsen was a bit smaller than expectations and everyone is just in the same central area the whole time. It doesn't feel too crowded but even if you are whispering you can hear a lot since it's so packed - The place is super cutely decorated! That was my favorite part. Bad: - The price is high for the experience since it's $120 for sauna + dinner. read more

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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! read more

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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! read more

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Very small place and packed with too many people as others have voiced. Staff was nice and friendly. I think dinner was alright but pricey for what you get. Good experience but I don't think we will be coming back. read more

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. read more

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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. read more

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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 read more

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Loved the spa- but it's tiny!!! Be aware before you go, Clean, great service! Cold shower, steam room, sauna and jacuzzi. You get a tea and snack in the outdoor area- cute spot. read more

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. read more

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My friend and I were excited to try this place but it was totally not what I expected. This place is extremely misleading. Although it's 4 people per booking slot, there can be up to 15 people sharing the tiny tiny space...! When we got to the locker room, there was absolutely no place to stand, no benches available. I couldn't even look for my locker. It's a very strange and cramped layout. My robe was torn from the sleeve to the armpit. And the ties around the waist were extremely small. When we headed to the Onsen area, there's 3 showers. Most of the time you have to wait until there's one available. The non handicapped stall had such high pressure coming out from the spout, it hurt so bad to shower. I couldn't change the pressure. It was like a really hard hose spraying you. We had no idea that 15 people would be in this area. The pool is very small so most of the time people would force themselves to use the sauna or steam room since there was no room. The "cold plunge" is just a ceiling shower with cold water. They tell you to use whispering voice levels but everyone was practically yelling. I could hear them when in another room with the door closed. Overall I was just stressed and wanted to leave as soon as possible. I came there to relax, and have some peace, but instead I was stressed from how loud it was and how crowded the small area was. Because you have to take your shoes off before the locker room, that means you also have to wear your sandals back out to the shoe area, but your sandals are wet and you're not allowed to take towels with you. Not to mention when you exit (if you book a later time) it is on one of the worst blocks in SF. Homeless and feces everywhere. It's not very safe and comforting coming in or out. For $50, it is so not worth it. read more

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. read more

Onsen - Day Spas Near Me - San Francisco, California

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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. read more

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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. read more

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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! read more

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I went to do the spa only and thought it was better than I was expecting. There is a sauna, steam room, warm plunge pool, and a cold shower. The place is small but even with 14 people in the spa, it felt fine, 10 would have been better. People seemed behaved so it was good - meaning they were relatively quiet and cleaned before and after entering areas (mostly). I can see it not being so relaxing if you got stuck with a group that didn't follow the rules. The food smelled great so maybe next time we will book the dinner spa combo. I will however say that the location is terrible, so you just have to get over it if you want to experience this place read more

My partner surprised me with an onsen and dinner experience yesterday and I was so happy he did! I am giving a blended review of both experiences, starting first with the onsen. It's $50 for about 2 hours for 1 person. There is a wet sauna, dry sauna, and hot tub available for use. I loved their saunas and the hot tub was just ok. The water was not hot enough and the main room was also a little chilly. Although there were about 10 or so guests there, it didn't feel crowded, and everyone was very nice. It was a great experience but could be leveled up with some small changes, overall, I give the experience a 4 or 5 star review! Specifically, there wasn't towels or robes in my locker when I arrived. I felt like the spa area's bathroom needed more attention than it got and a few other small complaints, but those were the main ones. Details that could be tightened up to just make the experience feel more lux. Pearl Spa used to offer a day pass option for $40 before COVID, but now they no longer do. This experience is probably the closest to that, and it's co-ed! A body scrub or massage would have been amazing to add on. I would 100% come back for the onsen. I can tell the owner(s) care deeply about the ambiance and small details of the restaurant and spa. Service was amazingly professional from everyone, so please don't think my review is taking away from your wonderful staff. The reason for the 3 star review is because of the dinner! I'm sorry but it wasn't what we preferred at all. Had I seen the menu beforehand, candidly, I don't think we would have stayed. They have rotating chefs, I think?, and the menu we had was prefixed with 3 courses. I do not feel like I got good value for what we paid ($60/person), mainly because the portions were really small. I think if the food aligned with my palate more, I think the portion sizes would have bothered me less? Who knows. The dinner just felt pretentious? I feel like that word is way too harsh, but it's all I can think of at the moment. First course was a small piece of salmon with creme fresh and a cilantro sauce. It was legit just 1 piece of salmon and the pieces of honeydew served weren't ripe or sweet. The sauce served with the salmon honestly just didn't taste like anything and pooled on the plate. It was a lot of great ideas with meh execution and tiny portions, so it just felt a little lame. Second course was a risotto, again, a really really small portion. I think there were clams or mussels in it. Not very flavorful but cooked well? Third course was a dessert with cooked peaches and mango, some kinda cheese cake foam thing, and some shaved salted egg. It was probably the best dish, but god honestly, I just wanted a darn real slice of cake. Maybe we were just starving from soaking and sweating away in the sauna, so our appetites were just bigger than normal, but I couldn't help but notice the table next to us had meh reactions to the food too. I love fancy food, unique concepts, pretentious / boujee dishes. TBH...$60 / person really isn't that much if I just liked the dinner better. Compared to what others have gotten as prefixed options, I just kinda felt let down... Since I didn't like it, it therefore felt like too much money... I'd love to come back and try everything again. I love the concept and want to support this business. I just wish I could see the menu beforehand so I can decide if this is an onsen only night or a duo-experience night. Edit to add: I did want to make one more comment. My partner and I were celebrating an anniversary. For that celebration, our waitress brought my partner a shot of alcohol. Since I don't drink...I got nothing, and I thought that was really weird... read more

This is such a beautiful and welcoming space. My time in the spa was very calming and restorative. One word of warning- the neighborhood isn't the best. I was staying next to Union Square and walked the 12 minutes to the spa through the Tenderloin. There were unhoused people sprawled in the street, passed out and people openly shooting up. It would've been very walkable, but I'm not sure I'd try that again. The pictures of the place on the website gave no clue about the surroundings outside. Not their fault, just an FYI for other out of town visitors. read more

First time enjoying bathhouse/steam room/ sauna. The area is relaxed. Booked in advance, and for two hours, you can check out the sauna, steam, hot tub, cold plunge.. any order. I got to check out the awesome bidet toilet. I feel so much better and relaxed. They had cold ice cold water, and hot peppermint tea. It was good. Attendants were on point, and constantly checking and collecting dirty cups and making sure the area is clean. I wish I took pictures, but too relaxed to! read more

Only con is finding parking and the location(tenderloin). The entire place is nicely renovated and looks practically new. Very aesthetic. The quiet rules are leniently enforced. People were certainly talking but it was not disturbing the experience. The space is limited but counteracted by a limited number of people per timeslot. The customer service of the attendants are amazing. They take care of your from beginning to end. I'm excited to see what the bar will look like. read more

The moment my cousin and I checked in, the staff made us feel welcomed and gave us the intro and rundown of where things were and what accommodations they had available (steam room, cold plunge, sauna, and onsen). Lockers and bathroom were clean. You're provided with your own robe, rubber sandals, and two towels. Three showers total with one being accessible for those that need that the space and additional accommodations. $50/person fee for two hours total at the Onsen. Came on a Tuesday where it's women-only and bathing suit was optional. Funny thing was, I think I spooked a customer, who was mature/older lady, because of my Irezumi style back tattoo. Each time I happened to be around her, she would deliberately stand up and go somewhere else. When we happened to go to the sauna or steam room at the same time, and she saw I was right behind her and sat down, she would stand back up and exit the room. Lol. I don't want to ding any stars to the venue based on customer biases and treatment towards me because it's not the business establishment's fault. So if you plan to go here and you have giant ass full back, sleeve, or whatever tattoos, and you happen to come across some traditional or square bear people who don't surround themselves too much with people with tattoos, don't be surprised how they act lol. I would come back again even though I know it's in the TL. read more

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My boyfriend and I came to our reservations about 20 minutes early just in case because of parking and you have to sign a waiver. It's a street parking so I recommend taking a Lyft/uber to the onsen so you don't have to worry. The location is a bit sketch as it is located in the TL so just beware of that. When we walked inside, it was a restaurant that isn't opened yet so it was interesting to see. We got checked in by the front desk who was very thorough in explaining to us the locker rooms and the etiquette of the Japanese bath house. They provide you slippers, a robe and two towels that you have to return at the end of the reservation. All reservations are $50 for 2 hours per person. I will say 2 hours is a bit long to be soaking yourself so I wished they offered 1-1.5 hours but you can leave early if you want. In the onsen, there's the giant warm "pool" and it is communal so you can see maybe 8/10 people always wandering around. They have a steam room, sauna and a cold water plunge shower head and private showering stalls. It was really relaxing and you can talk to others as well. They provide hot tea and water so make sure you stay hydrated so you don't faint from sweating. I like that in the women's locker room, they provide toner, lotion, hair dryer and cotton swabs. My boyfriend said the men's locker room didn't have a sink so he did have to walk back to the communal area to use the sinks there. Overall very relaxing and it'll be a nice treat to come back once in a while! read more

Loud. Everyone is talking. Work conversations about Tech, AI, Apple, Google, VC funding etc. Groups of friends dominating the small space and hogging benches. So annoying and the opposite of relaxing. The policy to be quiet is not enforced at all. When I complained the attendant said "it's usually more zen" and that I should try them again sometime. This is not a relaxing experience. read more

This was for the spa and bath. I came in from out of town and wasn't sure what I was getting into. But wow! What a great experience. Beautiful bath and grotto that was extremely clean. Very serene and enjoyable. Will be back. read more

Small but beautiful facility. Very clean. Hot pool is sparkling. Sauna surprisingly large, not quite hot enough. Hot pool also not quite hot enough. Steam room is a little small and steam generator is a little aggressive. Nice towels, robes, toiletries. Could use another deck chair or two. Wish they offered 2 1/2 or 3 hour sessions instead of 2 hr. 2 hr isn't long enough. Haven't tried the food, yet, but the small restaurant space is charming. Neighborhood is an atrocity. Lyft in and out. Don't try walking thru that. read more

Nice experience once you are inside , though the area is quite small and the location/ neighborhood is not great. We enjoyed the soak, sauna , steam and the cold plunge showers. They could add more lounge chairs, for resting in between. read more

I had such a relaxing time at Onsen! I came for a 2-hour spa day and left feeling completely refreshed. The space includes a steam room, a Himalayan salt sauna, a cold plunge shower, and a cozy hot tub--plus complimentary iced water and tea, which was a lovely touch. I visited on a co-ed day (swimsuits required), and everything felt clean, calm, and respectful. The environment is peaceful with beautiful Japanese-inspired decor that adds to the soothing vibe. Just a heads-up: the name Onsen might make you think of a natural hot spring, but this is more of a curated spa experience--still 100% worth it! I'd absolutely come back again when I need a little reset. read more

I really love the space and for the price of $50, I think it's absolutely worth it. The changing room is a little small but gets the job done and the tub is nice and spacious. me and my best friend grabbed some iced water and tea to kind of balance out how we were feeling in the warmth!! The steam room was Hella hot. It was 113°. I wish we could've handled more of it but overall, a very beautiful, clean, and aesthetic place to spend two hours either alone or with some friends :) read more

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Went on an only women day, and it was very peaceful. The vibe was top notch. Aesthetically really cool. The spa facilities looked well maintained and clean. Overall it was nice. read more

The space itself and the staff were nice. The experience was unfortunately ruined a bit because of another trio of guests -- they were talking the entire two-hours as though they were the only ones using the hot tub (and totally oblivious to the instructions about being "mindful of maintaining a quiet and respectful atmosphere"). There was nothing quiet about them. I would've appreciated some sort of enforcement on behalf of the staff, asking them to quiet down. read more

This place is beautiful and clean! It deserves 5 stars! I want to come back BUT there was an employee there who needs to be let go! I was waiting for my friend to get out of the changing room to leave and this employee was throwing a full tantrum! I was sitting at the place where you take off/put on your shoes. She went into the employee stock room. She kept screaming how much she hated it there! How she couldn't wait for the day she didn't have to come back. And how everyone is in their 30s and she's only 19. The door is made out of fabric. So I heard EVERYTHING!!! She came out and kept talking under her breath. She then threw the slippers from the basket to the slipper stocking area. It was SUPER uncomfortable and not the best situation to be in after a relaxing/peaceful experience. Again, the experience was 10/10! But that girl was awful! She had a double nose piercing and was wearing a Ed hardy jacket if management sees this. read more

They're rebooting the business, and while I was excited, it wasn't as serene as expected. The sauna and steam room were too hot for me to stay in long, and some visitors were louder than I anticipated for an Onsen. Although appointments are limited, the space still felt cramped. On the plus side, I appreciated the clean robe, towel, and the cold water and hot tea. The restaurant isn't open yet, and outside food or drinks aren't allowed. read more

Omg! It's so good to be back in this space!!!!! We used to go here all the time before the pandemic. We love it all- the steam punk shower, the lighting, the plants, the bricks, the signage. Thank you for bringing this back into our lives!!! read more

Go! A sento in the center of the Tenderloin. Adam and his team of thoughtful, kind attendants is right on. What a spot! So beautifully design. The steam was perfect -- and the sauna was rightfully piping hot. Perfecto! read more

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

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

4.5 stars to be exact. Great vibes, great decor, extremely relaxing, great service. The only con, which is fine, is the area. That's an S.F. problem, not Onsen problem. Haven't tried dinner but will next time. Very great overall Japanese experience. read more

My friends and I made a reservation here two weeks in advance only for them to cancel it the night before. When I wrote to express my confusion, they sent me an AI-generated email with a screenshot saying their policy is "We strongly discourage groups of five or more booking the communal bathhouse." It's a creative use of the term "strongly discourage" to mean not allowed. A discouragement is typically a recommendation... Would've gladly followed any actual policies, like if their website had said, "No reservations for groups of 5+." I'm happy to lend them this revision to not waste the time of future guests. Earlier notice or some accountability would've been nice too but no acknowledgement whatsoever. Can't support these bad business practices and happy to take our business elsewhere. read more