The Art of Japanese Onsen, Reimagined for You.
Step into your sanctuary of self ritual and wellness. Soak in warmth. Thoughtful rituals. Deep restoration.
A sanctuary of warmth, stillness, and renewal.
A return to balance, from within.
Crafted to Heal, Designed to Honor
Each treatment at Onsei is a gentle invitation to slow down, reconnect, and let your body and mind return to balance.
Soak Into Stillness
Mon-Sun: 8 AM – 22 PM
We create space for you to reconnect through stillness.
True calm begins when you're finally allowed to feel slow again
Thoughtfully Designed Spaces
Countless Moments of Stillness
Endless Ways to Reconnect
Explore our services to match your needs and rhythm.
Onsen Signature Package
60 minutes – A fusion of bamboo warmth & shiatsu points to ease tension and calm the mind.
Massage
Add On 30 minutes – Gentle exfoliation with green tea & rice scrub for smoother, glowing skin.
Reflexology
90 minutes – Extended session for deeper muscle release and full-body balance.
Face Accupressure & Head Massage
Add On 30 minutes – Targeted pressure points to release tension, improve circulation, and refresh your mind.
Bamboo Shiatsu Massage
120 minutes – Ultimate detox and rejuvenation with warm bamboo therapy.
What Clients Says
From the moment I stepped into Onsei, I felt like I was transported to Japan. The space is calming, beautifully designed, and the staff made me feel completely at ease. I tried the Onsei Flow Massage and honestly, it melted away weeks of tension. The onsen soak before the treatment was the perfect way to start. I left feeling lighter, calmer, and completely recharged.
Isabel Valencia
This is unlike any spa I’ve visited in Jakarta. From the minimal, serene interior to the thoughtfully curated treatments, everything felt intentional. I tried the Japanese Lymphatic Drainage massage and it was deeply therapeutic. You can tell they really understand the body here. I loved every second and can’t wait to bring my friends.
Sheline Claudia
The Japanese onsen experience at Onsei was beyond what I imagined. The warmth of the bath, the scent of hinoki wood, and the silence… it all worked together to quiet my busy mind. I followed it with their reflexology treatment, and the therapist was incredibly skilled. I haven’t felt this relaxed in years. Definitely coming back soon.
