KASUMI
Finnish sauna. Cold plunge.
Private studio.
COMING LATE 2026
THE RITUAL
Heat. Cold. Silence.
The ancient practice of contrast therapy, refined for the modern mind. Each 60-minute session follows a deliberate protocol designed to unlock what the Japanese call Totonoi — a state of complete mental clarity.
Heat
15–20 minutes in a proper Finnish sauna at 180–200°F. High heat, real humidity. Throw water on the stones for löyly — the burst of steam that opens your pores and deepens the experience.
Your heart rate climbs. Endorphins flood.
Cold
2–3 minutes submerged in 38–42°F water. Instant vasoconstriction. A rush of norepinephrine and dopamine. Every thought falls away. There is only breath and cold.
The body contracts. The mind sharpens.
Rest
10–15 minutes reclined in our zero-gravity chair. Sound-proofed. Temperature-neutral. Weightless. This is where the magic happens — parasympathetic activation. Complete mental clarity.
The nervous system recalibrates. You float.
Repeat the cycle 2–3 times within your 60-minute session for optimal results.
YOUR SANCTUARY
Private. Refined. Intentional.
Each suite is a self-contained environment designed for complete immersion. No shared spaces. No distractions. No compromises. Just you, the heat, the cold, and the silence that follows.
Completely Private
Sound-proofed suite. Keyless entry. Your own sauna, plunge, and rest area.
Premium Self-Care
Dyson Supersonic hair dryers. Dermatologist-approved skincare. Organic towels and robes.
Curated Hydration
Sparkling mineral water. House-blended electrolyte solutions. Ceremonial-grade matcha and herbal teas.
Infinity Rest Chair
Zero-gravity positioning. Temperature-regulated. The pinnacle of the Totonoi experience.
Marina District, San Francisco
$90 per 60-minute private session
Founding member pricing available to waitlist early access.
JOIN WAITLIST
Join the Founding Circle
Kasumi opens late 2026. Founding members receive priority booking, exclusive pricing, and early access to our Marina location. We're selecting a limited cohort of members who understand the value of recovery.