
Yunomori Onsen Sukhumvit
Authentic Japanese onsen on Sukhumvit 26
Editor’s Take
Yunomori is one of those Bangkok institutions that somehow never gets old. The onsen circuit — hot pools, cold plunge, repeat — is the perfect antidote to a Bangkok day. The thermal water is legit (not just heated tap water), and the combination of Japanese bathing culture with Thai massage is inspired. The Sukhumvit 26 location is walkable from Phrom Phong BTS. Go on a weekday afternoon to avoid crowds. The 450-baht entry for the onsen alone is one of Bangkok's best wellness bargains.
About
Yunomori brought authentic Japanese onsen culture to Bangkok with real thermal spring water sourced from Wat Wangkanai. The Sukhumvit 26 facility in A-Square features multiple temperature pools with different mineral compositions, each designed to detoxify and relax. Beyond the baths, the spa menu combines Japanese onsen tradition with Thai massage techniques — a fusion that works surprisingly well.
Treatments & Services
Signature: Onsen Bathing Circuit + Thai Massage
Highlights
- ✓Real thermal spring water from Wat Wangkanai
- ✓Multiple temperature pools and mineral baths
- ✓Combined onsen and Thai spa menu
- ✓Sukhumvit 26 location near BTS Phrom Phong
- ✓Bangkok's most established onsen
Best For
Anyone wanting authentic Japanese onsen bathing without the flight to Tokyo
Contact & Info
Address
A-Square, 120/5 Soi Sukhumvit 26, Khlong Tan, Khlong Toei, Bangkok 10110
Open in Google Maps →Phone
+66 2 259 5778Hours
Daily 09:00-23:00
Languages
English, Thai, Japanese
Similar Venues

Kaizen Private Onsen
Private onsen rooms combining Japanese bathing culture with Thai spa massage on Sukhumvit 26. Modern Japanese design, sauna, steam room, and full spa menu.
Book now →
Oasis Spa Sukhumvit 31
Set in a tranquil compound along Sukhumvit 31, Oasis Spa offers extensive massage and spa treatments in a Lanna-inspired Thai setting with late-night hours until midnight.
Book now →
CORAN Boutique Spa
A World Luxury Spa Awards winner on Sukhumvit Soi 15, combining Japanese-style meticulous service with 50+ treatments spanning Ayurveda, aromatherapy, and Thai techniques. Treatments start from just 500 THB.
Book now →
Totonoi Sauna & Onsen
Authentic Japanese sauna culture brought to Bangkok by Japan's leading sauna event organizers. Purpose-built facility in Thonglor with public zones, private VIP onsens, and an on-site restaurant.
Book now →