This hidden gem is what we've been waiting for all along. We had no idea there was a portal to gastronomica orgasmica here and our tastebuds are delighted. The dinner set was so delicious I sometimes forgot to take a picture of what was served. The staff accommodating my gluten-free and meat-free diet was top notch and the off-the-cuff prepared substitutions were out of this world. The junmai sake surprised me as I normally don't care for filtered - please do yourself a favor and have a tasty glass!
Appliance Repair
Absolutely loved this place! The collaboration with the Japanese restaurant is a brilliant idea—the food was fantastic. The staff was super friendly and helpful throughout the entire experience. I would definitely recommend visiting to anyone looking to relax. Thank you, guys! Will be back soon for sure.
Ro DeJesus
The space was very small and overcrowded, making it hard to achieve a meditative state. Limiting the number of patrons would improve the experience.
Jered Nelson
Beautiful.
MA (Madda)
Facilities good but small. Area around there is bad and dangerous. Dinner at popup restaurant was ok. Not great not bad.
Nicholas Lee
Beautiful space. Soo relaxing
P I
Nice people. Rough neighborhood. Parking across the street $15. Ride share is best.
Dianne Namgung
This was a fun experience. We did the Onsen followed by set dinner menu. The spa was so relaxing especially because we were sore from workout/a lot of walking previous day. The dinner was beautiful and delicious. It is on the smaller portion size but we had already planned a 2nd dinner later in the night! It was a stop in a very long bar/restaurant hop
A-Jay
Had a wonderful Sunday visit with my girlfriends. It’s kept clean and organised by the staff and it’s the perfect scale for an escape in the city
Had a wonderful, relaxing time at Onsen with my sister. We loved the sauna, steam, cold plunge and heated pool. Clean and welcoming. Stef at the front desk's service was wonderful. Thank you, Stef for making our experience lovely.
Natalie Dunn
We had a reservation at OnSen but unfortunately the power was out that day. The staff, especially Adam, went above and beyond to make sure we were taken care of—they even helped us book at another bathhouse nearby so we wouldn’t miss out. This was our first outing together in several months since having our baby, and their understanding and kindness meant so much to us. Even though we didn’t get to experience OnSen this time, the thoughtful service alone has us excited to come back at the next opportunity. We highly recommend OnSen for their outstanding hospitality and customer care.
Marion Lang
“We allow and encourage people to interact with their friends and their fellow bather. We ask that people keep their voices calm and to speak softly.”
This is true, and the noise level is unpredictable. Ive had relaxing experiences where people were polite and quiet, and other experiences where people were loud, having full volume conversations. There doesn’t seem to be any guidance or enforcement about noise levels from staff.
Would not recommend if you expect the opportunity to have quiet and meditative moments—your ability to do so will depend on other patrons, not the staff.
Kyle Buttner
Incredible space, lovely staff, all around great experience.
Taylor
Wonderful small Onsen tucked away in the TL. I really enjoyed the all male day. It was clean, had the essentials, and I enjoyed the vibe. Other than Kabuki, this has to be my favorite Onsen in SF.
If I was being picky maybe I’d recommend to have ambient and atmospheric music as opposed to what was playing, which had more of a driving beat and interrupts the feeling of flow and relaxation that some are seeking out in these spaces. I had to try and ignore it, because I’m not trying to dance along to a song at an Onsen, but just relax.
Bath great 😌 Food amazing 🤤
This hidden gem is what we've been waiting for all along. We had no idea there was a portal to gastronomica orgasmica here and our tastebuds are delighted. The dinner set was so delicious I sometimes forgot to take a picture of what was served. The staff accommodating my gluten-free and meat-free diet was top notch and the off-the-cuff prepared substitutions were out of this world. The junmai sake surprised me as I normally don't care for filtered - please do yourself a favor and have a tasty glass!
Absolutely loved this place! The collaboration with the Japanese restaurant is a brilliant idea—the food was fantastic. The staff was super friendly and helpful throughout the entire experience. I would definitely recommend visiting to anyone looking to relax. Thank you, guys! Will be back soon for sure.
The space was very small and overcrowded, making it hard to achieve a meditative state. Limiting the number of patrons would improve the experience.
Beautiful.
Facilities good but small. Area around there is bad and dangerous. Dinner at popup restaurant was ok. Not great not bad.
Beautiful space. Soo relaxing
Nice people. Rough neighborhood. Parking across the street $15. Ride share is best.
This was a fun experience. We did the Onsen followed by set dinner menu. The spa was so relaxing especially because we were sore from workout/a lot of walking previous day.
The dinner was beautiful and delicious. It is on the smaller portion size but we had already planned a 2nd dinner later in the night! It was a stop in a very long bar/restaurant hop
Had a wonderful Sunday visit with my girlfriends. It’s kept clean and organised by the staff and it’s the perfect scale for an escape in the city
Restaurantji Recommends
Had a wonderful, relaxing time at Onsen with my sister. We loved the sauna, steam, cold plunge and heated pool. Clean and welcoming. Stef at the front desk's service was wonderful. Thank you, Stef for making our experience lovely.
We had a reservation at OnSen but unfortunately the power was out that day. The staff, especially Adam, went above and beyond to make sure we were taken care of—they even helped us book at another bathhouse nearby so we wouldn’t miss out. This was our first outing together in several months since having our baby, and their understanding and kindness meant so much to us. Even though we didn’t get to experience OnSen this time, the thoughtful service alone has us excited to come back at the next opportunity. We highly recommend OnSen for their outstanding hospitality and customer care.
“We allow and encourage people to interact with their friends and their fellow bather. We ask that people keep their voices calm and to speak softly.”
This is true, and the noise level is unpredictable. Ive had relaxing experiences where people were polite and quiet, and other experiences where people were loud, having full volume conversations. There doesn’t seem to be any guidance or enforcement about noise levels from staff.
Would not recommend if you expect the opportunity to have quiet and meditative moments—your ability to do so will depend on other patrons, not the staff.
Incredible space, lovely staff, all around great experience.
Wonderful small Onsen tucked away in the TL. I really enjoyed the all male day. It was clean, had the essentials, and I enjoyed the vibe. Other than Kabuki, this has to be my favorite Onsen in SF.
If I was being picky maybe I’d recommend to have ambient and atmospheric music as opposed to what was playing, which had more of a driving beat and interrupts the feeling of flow and relaxation that some are seeking out in these spaces. I had to try and ignore it, because I’m not trying to dance along to a song at an Onsen, but just relax.
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