Private Onsen Rooms in Bangkok — Bonsai & Sakura

Bonsai · Sauna Room

Ice bath, mineral salt Japanese hot onsen, Himalayan salt-wall sauna room.

3,190+ THBper room / 60 min

Add-on: 1,000+ THB / 15 min

Sakura · Steam Room

Ice bath, mineral salt Japanese hot onsen, and steam room.

3,190+ THBper room / 60 min

Add-on: 1,000+ THB / 15 min

Each room is entirely private for the length of your booking — no shared bathhouse, no communal schedule. A hot mineral-salt onsen bath is paired with a separate ice bath for contrast bathing (alternating hot and cold), plus either a Himalayan salt-wall sauna (Bonsai) or a steam room (Sakura). Sessions run from 60 minutes and extend in 15-minute increments; both rooms comfortably hold up to three guests. New to hot-cold contrast bathing, or wondering whether it's right for you? Our Contrast Therapy, Ice Bath & Sauna page covers how a session is structured, and our Journal guide to contrast therapy goes deeper on the reported benefits and who should check with a doctor first.

Prefer to make it a habit? Each bundle pairs a Private Onsen room with the treatment below, at a lower per-visit rate the more you book. Passes are valid for 1 year from the date of purchase.